Low-noise wideband ultrasound detection using polymer microring resonators
Sheng-Wen Huang, Sung-Liang Chen, Tao Ling, Adam Maxwell, Matthew O'Donnell et al.
Polymer microring resonators for low-noise, wideband ultrasound detection are presented. Using a nanoimprinting technique, we fabricated polymer microring resonators with a quality factor of 6000 resulting in high sensitivity to ultrasound. A noise-equivalent pressure of 0.23 kPa over 175 MHz and ... [Appl. Phys. Lett. 92, 193509 (2008)] published Thu May 15, 2008.
Uncertainties caused by source directivity in room-acoustic investigations
Ricardo San Martin and Miguel Arana
Although deviations in the measurement of acoustic parameters should be lower than the subjectively perceivable change in the corresponding parameter measured, this study reflects that directionality of sound sources could cause wide audience areas to break away from this criterion at high frequenci ... [J. Acoust. Soc. Am. 123, EL133 (2008)] published Thu May 15, 2008.
Effect of ocean sound speed uncertainty on matched-field geoacoustic inversion
Chen-Fen Huang, Peter Gerstoft, and William S. Hodgkiss
The effect of ocean sound speed uncertainty on matched-field geoacoustic inversion is investigated using data from the SW06 experiment along a nearly range-independent bathymetric track. Significant sound speed differences were observed at the source and receiving array and several environmental par ... [J. Acoust. Soc. Am. 123, EL162 (2008)] published Thu May 15, 2008.
Infants use prosodically conditioned acoustic-phonetic cues to extract words from speech
Elizabeth K. Johnson
The Headturn Preference Paradigm was used to examine infants' use of prosodically conditioned acoustic-phonetic cues to find words in speech. Twelve-month-olds were familiarized to one passage containing an intended target (e.g., toga from toga#lore) and one passage containing an unintended target ( ... [J. Acoust. Soc. Am. 123, EL144 (2008)] published Thu May 15, 2008.
Human motion analyses using footstep ultrasound and Doppler ultrasound
Alexander Ekimov and James M. Sabatier
Human footsteps generate periodic broadband frequency envelopes of sound due to dynamic friction forces. Also, human body motion when walking is a cyclic temporal process. The individual body parts have different acoustic cross sections and velocities that form unique human Doppler signatures. The p ... [J. Acoust. Soc. Am. 123, EL149 (2008)] published Thu May 15, 2008.
A mechanism stimulating sound production from air bubbles released from a nozzle
Grant B. Deane and Helen Czerski
Gas bubbles in water act as oscillators with a natural frequency inversely proportional to their radius and a quality factor determined by thermal, radiation, and viscous losses. The linear dynamics of spherical bubbles are well understood, but the excitation mechanism leading to sound production at ... [J. Acoust. Soc. Am. 123, EL126 (2008)] published Thu May 15, 2008.
Determination of acoustic attenuation in the Hudson River Estuary by means of ship noise observations
Heui-Seol Roh, Alexander Sutin, and Barry Bunin
Analysis of sound propagation in a complex urban estuary has application to underwater threat detection systems, underwater communication, and acoustic tomography. One of the most important acoustic parameters, sound attenuation, was analyzed in the Hudson River near Manhattan using measurements of ... [J. Acoust. Soc. Am. 123, EL139 (2008)] published Thu May 15, 2008.
Bayesian geoacoustic inversion in a dynamic shallow water environment
Yong-Min Jiang and N. Ross Chapman
This paper presents results for matched field Bayesian geoacoustic inversion of multitonal continuous wave data collected on the New Jersey continental shelf. To account for effects of significant spatial and temporal variation of the water column sound speed, the sound speed profile was represented ... [J. Acoust. Soc. Am. 123, EL155 (2008)] published Thu May 15, 2008.
Measurement of the resonance frequency of single bubbles using a laser Doppler vibrometer
Theodore F. Argo, IV, Preston S. Wilson, and Vikrant Palan
The behavior of bubbles confined in tubes and channels is important in medical and industrial applications. In these small spaces, traditional means of experimentally observing bubble dynamics are often impossible or significantly perturb the system. A laser Doppler vibrometer (LDV) requires a narro ... [J. Acoust. Soc. Am. 123, EL121 (2008)] published Thu May 15, 2008.
Simultaneous Occurrence of Structure-Directed and Particle-Resonance-Induced Phononic Gaps in Colloidal Films
T. Still, W. Cheng, M. Retsch, R. Sainidou, J. Wang et al.
We report on the observation of two hypersonic phononic gaps of different nature in three-dimensional colloidal films of nanospheres using Brillouin light scattering. One is a Bragg gap occurring at the edge of the first Brillouin zone along a high-symmetry crystal direction. The other is a hybridiz ... [Phys. Rev. Lett. 100, 194301 (2008)] published Tue May 13, 2008.
A Design of Asynchronous Quasi-Delay Insensitive Computer
Sufian Sudeng and Arthit Thongtak
This paper proposes the self-timed circuit design. Quasi-delay insensitive circuit is introduced as asynchronous prototype. The designed circuit focuses on asynchronous processor design. The processor employs asynchronous system bus, asynchronous DMA controller and synchronous interfaces. The system ... [AIP Conf. Proc. 1007, 83 (2008)] published Mon May 12, 2008.
Shape-based ultrasound tomography using a Born model with application to high intensity focused ultrasound therapy
Basak Ulker Karbeyaz, Eric L. Miller, and Robin O. Cleveland
A shaped-based ultrasound tomography method is proposed to reconstruct ellipsoidal objects using a linearized scattering model. The method is motivated by the desire to detect the presence of lesions created by high intensity focused ultrasound (HIFU) in applications of cancer therapy. The computati ... [J. Acoust. Soc. Am. 123, 2944 (2008)] published Fri May 9, 2008.
Effect of combined source (F0) and filter (formant) variation on red deer hind responses to male roars
Benjamin D. Charlton, David Reby, and Karen McComb
Studying female response to variation in single acoustic components has provided important insights into how sexual selection operates on male acoustic signals. However, since vocal signals are typically composed of independent components, it is important to account for possible interactions between ... [J. Acoust. Soc. Am. 123, 2936 (2008)] published Fri May 9, 2008.
Frequency and level dependent masking of the multiple auditory steady-state response in the bottlenose dolphin (Tursiops truncatus)
Brian K. Branstetter, James J. Finneran, and Dorian S. Houser
The potential for interactions between steady-state evoked responses to simultaneous auditory stimuli was investigated in two bottlenose dolphins (Tursiops truncatus). Three experiments were conducted using either a probe stimulus (probe condition) or a probe in the presence of a masker (probe-plus- ... [J. Acoust. Soc. Am. 123, 2928 (2008)] published Fri May 9, 2008.
The frequency response of rat vibrissae to sound
Lisa F. Shatz and Craig W. Christensen
The motion of isolated rat vibrissae due to low frequency sound has been modeled and measured with good agreement (within a factor of 2) between the data and the model's predictions. As had been done in previous studies on the response of rat vibrissae to tactile stimulation [Hartmann, M. J., Johnso ... [J. Acoust. Soc. Am. 123, 2918 (2008)] published Fri May 9, 2008.
Carrier-dependent temporal processing in an auditory interneuron
Patrick Sabourin, Heather Gottlieb, and Gerald S. Pollack
Signal processing in the auditory interneuron Omega Neuron 1 (ON1) of the cricket Teleogryllus oceanicus was compared at high- and low-carrier frequencies in three different experimental paradigms. First, integration time, which corresponds to the time it takes for a neuron to reach threshold when s ... [J. Acoust. Soc. Am. 123, 2910 (2008)] published Fri May 9, 2008.
Human listeners attend to size information in domestic dog growls
Anna M. Taylor, David Reby, and Karen McComb
The acoustic features of vocalizations have the potential to transmit information about the size of callers. Most acoustic studies have focused on intraspecific perceptual abilities, but here, the ability of humans to use growls to assess the size of adult domestic dogs was tested. In a first experi ... [J. Acoust. Soc. Am. 123, 2903 (2008)] published Fri May 9, 2008.
The structure of vocal sounds produced with the mouth closed or with the mouth open in treefrogs
Marcos Gridi-Papp
Frogs and toads mostly call with their mouths shut, unlike many other vertebrates. Sound is generated when air crosses the larynx, but there is no direct airflow to the external environment and radiation occurs at the skin. This study directly compares the acoustic output obtained from euthanized fr ... [J. Acoust. Soc. Am. 123, 2895 (2008)] published Fri May 9, 2008.
Broadband backscatter from individual Hawaiian mesopelagic boundary community animals with implications for spinner dolphin foraging
Whitlow W. L. Au and Kelly J. Benoit-Bird
Broadband simulated dolphin echolocation signals were used to measure the ex situ backscatter properties of mesopelagic boundary community (MBC) in order to gain a better understanding of the echolocation process of spinner dolphins foraging on the MBC. Subjects were captured by trawling with a 2-m- ... [J. Acoust. Soc. Am. 123, 2884 (2008)] published Fri May 9, 2008.
Mathematics of pulsed vocalizations with application to killer whale biphonation
Judith C. Brown
Formulas for the spectra of pulsed vocalizations for both the continuous and discrete cases are rigorously derived from basic formulas for Fourier analysis, a topic discussed qualitatively in Watkins' classic paper on the harmonic interval [The harmonic interval: Fact or artifact in spectral analysi ... [J. Acoust. Soc. Am. 123, 2875 (2008)] published Fri May 9, 2008.
Suppression of shocked-bubble expansion due to tissue confinement with application to shock-wave lithotripsy
Jonathan B. Freund
Estimates are made of the effect of tissue confinement on the response of small bubbles subjected to lithotriptor shock pressures. To do this the RayleighPlesset equation, which governs the dynamics of spherical bubbles, is generalized to treat a bubble in a liquid region (blood), which is in turn e ... [J. Acoust. Soc. Am. 123, 2867 (2008)] published Fri May 9, 2008.
Intra- versus intermodal integration in young and older adults
Brent P. Spehar, Nancy Tye-Murray, and Mitchell S. Sommers
The ability to integrate information across sensory channels is critical for both within- and between-modality speech processing. The present study evaluated the hypothesis that inter- and intramodal integration abilities are related, in young and older adults. Further, the investigation asked if in ... [J. Acoust. Soc. Am. 123, 2858 (2008)] published Fri May 9, 2008.
Information transfer analysis: A first look at estimation bias
Elad Sagi and Mario A. Svirsky
Information transfer analysis [G. A. Miller and P. E. Nicely, J. Acoust. Soc. Am. 27, 338352 (1955)] is a tool used to measure the extent to which speech features are transmitted to a listener, e.g., duration or formant frequencies for vowels; voicing, place and manner of articulation for consonants ... [J. Acoust. Soc. Am. 123, 2848 (2008)] published Fri May 9, 2008.
Effect of spectral normalization on different talker speech recognition by cochlear implant users
Chuping Liu, John Galvin, III, Qian-Jie Fu, and Shrikanth S. Narayanan
In cochlear implants (CIs), different talkers often produce different levels of speech understanding because of the spectrally distorted speech patterns provided by the implant device. A spectral normalization approach was used to transform the spectral characteristics of one talker to those of anot ... [J. Acoust. Soc. Am. 123, 2836 (2008)] published Fri May 9, 2008.
Compensation for coarticulation, /u/-fronting, and sound change in standard southern British: An acoustic and perceptual study
Jonathan Harrington, Felicitas Kleber, and Ulrich Reubold
The aim of the study was to establish whether /u/-fronting, a sound change in progress in standard southern British, could be linked synchronically to the fronting effects of a preceding anterior consonant both in speech production and speech perception. For the production study, which consisted of ... [J. Acoust. Soc. Am. 123, 2825 (2008)] published Fri May 9, 2008.
Acoustic cues to tonal contrasts in Mandarin: Implications for cochlear implants
Yu-Ching Kuo, Stuart Rosen, and Andrew Faulkner
The present study systematically manipulated three acoustic cuesfundamental frequency (f0), amplitude envelope, and durationto investigate their contributions to tonal contrasts in Mandarin. Simplified stimuli with all possible combinations of these three cues were presented for identification to ei ... [J. Acoust. Soc. Am. 123, 2815 (2008)] published Fri May 9, 2008.
A method to identify noise-robust perceptual features: Application for consonant /t/
Marion S. Regnier and Jont B. Allen
This study focuses on correlating speech confusion patterns, defined as consonant-vowel confusion as a function of the speech-to-noise ratio, and a model acoustic feature (AF) representation called the AI gram, defined as the articulation index density in the spectrotemporal domain. By collecting ma ... [J. Acoust. Soc. Am. 123, 2801 (2008)] published Fri May 9, 2008.
Differential contribution of envelope fluctuations across frequency to consonant identification in quiet
Frederic Apoux and Sid P. Bacon
Two experiments investigated the effects of critical bandwidth and frequency region on the use of temporal envelope cues for speech. In both experiments, spectral details were reduced using vocoder processing. In experiment 1, consonant identification scores were measured in a condition for which th ... [J. Acoust. Soc. Am. 123, 2792 (2008)] published Fri May 9, 2008.
What marks the beat of speech?
Greg Kochanski and Christina Orphanidou
Which acoustic properties of the speech signal differ between rhythmically prominent syllables and non-prominent ones? A production experiment was conducted to identify these acoustic properties. Subjects read out repetitive text to a metronome, trying to match stressed syllables to its beat. The an ... [J. Acoust. Soc. Am. 123, 2780 (2008)] published Fri May 9, 2008.
Focus, prosodic context, and phonological feature specification: Patterns of variation in fricative production
Noah Silbert and Kenneth de Jong
Because they consist, in large part, of random turbulent noise, fricatives present a challenge to attempts to specify the phonetic correlates of phonological features. Previous research has focused on temporal properties, acoustic power, and a variety of spectral properties of fricatives in a number ... [J. Acoust. Soc. Am. 123, 2769 (2008)] published Fri May 9, 2008.
Amplitude variations in coarticulated vowels
Ewa Jacewicz and Robert Allen Fox
This paper seeks to characterize the nature, size, and range of acoustic amplitude variation in naturally produced coarticulated vowels in order to determine its potential contribution and relevance to vowel perception. The study is a partial replication and extension of the pioneering work by House ... [J. Acoust. Soc. Am. 123, 2750 (2008)] published Fri May 9, 2008.
Nonlinear source--filter coupling in phonation: Theory
Ingo R. Titze
A theory of interaction between the source of sound in phonation and the vocal tract filter is developed. The degree of interaction is controlled by the cross-sectional area of the laryngeal vestibule (epilarynx tube), which raises the inertive reactance of the supraglottal vocal tract. Both subglot ... [J. Acoust. Soc. Am. 123, 2733 (2008)] published Fri May 9, 2008.
Spatio-temporal quantification of vocal fold vibrations using high-speed videoendoscopy and a biomechanical model
Raphael Schwarz, Michael Dollinger, Tobias Wurzbacher, Ulrich Eysholdt, and Jorg Lohscheller
Pathologic changes within the organic constitution of vocal folds or a functional impairment of the larynx may result in disturbed or even irregular vocal fold vibrations. The consequences are perturbations of the acoustic speech signal which are perceived as a hoarse voice. By means of appropriate ... [J. Acoust. Soc. Am. 123, 2717 (2008)] published Fri May 9, 2008.
Perception and cortical neural coding of harmonic fusion in ferrets
Sridhar Kalluri, Didier A. Depireux, and Shihab A. Shamma
This study examined the perception and cortical representation of harmonic complex tones, from the perspective of the spectral fusion evoked by such sounds. Experiment 1 tested whether ferrets spontaneously distinguish harmonic from inharmonic tones. In baseline sessions, ferrets detected a pure ton ... [J. Acoust. Soc. Am. 123, 2701 (2008)] published Fri May 9, 2008.
Relative weights for frequency glide detection using narrowband noise
Jinyu Qian and Virginia M. Richards
Narrowband noise stimuli were used to derive relative weights for detecting frequency glides in a yes/no procedure. One stimulus set was restricted to the duration of the glide. For the second stimulus set, there were fringe noise bands preceding and following the glide. For both sets, the center fr ... [J. Acoust. Soc. Am. 123, 2692 (2008)] published Fri May 9, 2008.
Speech detection in spatial and nonspatial speech maskers
Uma Balakrishnan and Richard L. Freyman
The effect of perceived spatial differences on masking release was examined using a 4AFC speech detection paradigm. Targets were 20 words produced by a female talker. Maskers were recordings of continuous streams of nonsense sentences spoken by two female talkers and mixed into each of two channels ... [J. Acoust. Soc. Am. 123, 2680 (2008)] published Fri May 9, 2008.
Pitch strength decreases as F0 and harmonic resolution increase in complex tones composed exclusively of high harmonics
D. Timothy Ives and Roy D. Patterson
A melodic pitch experiment was performed to demonstrate the importance of time-interval resolution for pitch strength. The experiments show that notes with a low fundamental (75 Hz) and relatively few resolved harmonics support better performance than comparable notes with a higher fundamental (300 ... [J. Acoust. Soc. Am. 123, 2670 (2008)] published Fri May 9, 2008.
Stimulus-frequency otoacoustic emission: Measurements in humans and simulations with an active cochlear model
Yong-Sun Choi, Soo-Young Lee, Kourosh Parham, Stephen T. Neely, and Duck O. Kim
An efficient method for measuring stimulus-frequency otoacoustic emissions (SFOAEs) was developed incorporating (1) stimulus with swept frequency or level and (2) the digital heterodyne analysis. SFOAEs were measured for 5501450 Hz and stimulus levels of 3262 dB sound pressure level in eight norma ... [J. Acoust. Soc. Am. 123, 2651 (2008)] published Fri May 9, 2008.
Model-based detection of synthetic bat echolocation calls using an energy threshold detector for initialization
Mark D. Skowronski and M. Brock Fenton
Detection of echolocation calls is fundamental to quantitative analysis of bat acoustic signals. Automated methods of detection reduce the subjectivity of hand labeling of calls and speed up the detection process in an accurate and repeatable manner. A model-based detector was initialized using a ba ... [J. Acoust. Soc. Am. 123, 2643 (2008)] published Fri May 9, 2008.
Sparsity constrained deconvolution approaches for acoustic source mapping
Tarik Yardibi, Jian Li, Petre Stoica, and Louis N. Cattafesta, III
Using microphone arrays for estimating source locations and strengths has become common practice in aeroacoustic applications. The classical delay-and-sum approach suffers from low resolution and high sidelobes and the resulting beamforming maps are difficult to interpret. The deconvolution approach ... [J. Acoust. Soc. Am. 123, 2631 (2008)] published Fri May 9, 2008.
Statistically motivated design of input signals for modern ultrasonic array systems
Fredrik Lingvall and Tomas Olofsson
Modern array systems allow for excitation of separate elements using arbitrary wave forms. This is utilized in pulse compression and coded excitation techniques to improve the imaging performance. Such techniques are however somewhat inflexible since they use predefined excitation schemes. This pape ... [J. Acoust. Soc. Am. 123, 2620 (2008)] published Fri May 9, 2008.
On the steering of sound energy through a supercritical plate by a near-field transducer array
Brian E. Anderson, W. Jack Hughes, and Stephen A. Hambric
The ability to direct sound energy through the flexural vibrations of a submerged plate at various angles of incidence using a near-field transducer array is investigated. An alumina bar is placed in front of a one-dimensional, eight-element transducer array, between the array and the water. Operati ... [J. Acoust. Soc. Am. 123, 2613 (2008)] published Fri May 9, 2008.
Calculations of modes in circumferentially nonuniform lined ducts
WenPing Bi
This paper proposes a computationally efficient method of determining eigenfunctions and eigenvalues of acoustic modes propagating in circular lined ducts with zero or uniform flow. Linings with circumferentially nonuniform impedance, as found in nacelle acoustics, are the focus. The method of solut ... [J. Acoust. Soc. Am. 123, 2603 (2008)] published Fri May 9, 2008.
Comparison of spheroidal and eigenfunction-expansion trial functions for a membrane in an infinite baffle
Tim Mellow and Leo Karkkainen
The on-axis far-field pressure response of a circular membrane in an infinite baffle when driven by a uniformly distributed electrostatic force is calculated using two different trial functions for the surface velocity distribution. The first is an expansion based upon a solution to the free space w ... [J. Acoust. Soc. Am. 123, 2598 (2008)] published Fri May 9, 2008.
Pipe wall damage detection by electromagnetic acoustic transducer generated guided waves in absence of defect signals
Milos Vasiljevic, Tribikram Kundu, Wolfgang Grill, and Evgeny Twerdowski
Most investigators emphasize the importance of detecting the reflected signal from the defect to determine if the pipe wall has any damage and to predict the damage location. However, often the small signal from the defect is hidden behind the other arriving wave modes and signal noise. To overcome ... [J. Acoust. Soc. Am. 123, 2591 (2008)] published Fri May 9, 2008.
Theory and analysis of frequency-domain photoacoustic tomography
Natalie Baddour
A new frequency-domain approach to photoacoustic tomography has recently been proposed, promising to overcome some of the shortcomings associated with the pulsed photoacoustic approach. This approach offers many of the benefits of pulsed photoacoustics but requires a different set of equations for m ... [J. Acoust. Soc. Am. 123, 2577 (2008)] published Fri May 9, 2008.
Influence of spatial correlation function on attenuation of ultrasonic waves in two-phase materials
Dalie Liu and Joseph A. Turner
Successful processing of materials by powder sintering relies on the creation of strong interparticle bonds. During certain critical stages of the sintering process, the medium may be modeled as two phases consisting of the particles and a surrounding matrix. Ultrasonic methods have been proposed as ... [J. Acoust. Soc. Am. 123, 2570 (2008)] published Fri May 9, 2008.
Optimization of transmitting beam patterns of a conformal transducer array
Zhengyao He and Yuanliang Ma
A method is presented to calculate the driving-voltage weighting vector of a conformal array of underwater acoustic transmitting transducers to obtain a low-sidelobe beam pattern based on the measured receiving array manifold. The relationship among three quantities is given, which are, respectively ... [J. Acoust. Soc. Am. 123, 2563 (2008)] published Fri May 9, 2008.
Fitting data, but poor predictions: Reverberation prediction uncertainty when seabed parameters are derived from reverberation measurements
Charles W. Holland
For many decades, researchers have been developing inverse techniques for estimating seabed parameters from reverberation data, notably scattering strength. Generally, the angular dependence of the scattering kernel is unknown and is either solved for or assumed fixed. In either case, agreement is t ... [J. Acoust. Soc. Am. 123, 2553 (2008)] published Fri May 9, 2008.
Experimental validation and applications of a modified gap stiffness model for granular marine sediments
Masao Kimura
The author has proposed a modified gap stiffness model, which is incorporated into the Biot model; the resultant model is called the BIMGS model. By using this model, it is theoretically demonstrated that the frame bulk modulus is dependent on frequency [M. Kimura, Frame bulk modulus of porous granu ... [J. Acoust. Soc. Am. 123, 2542 (2008)] published Fri May 9, 2008.
Boundary perturbation methods for high-frequency acoustic scattering: Shallow periodic gratings
David P. Nicholls and Fernando Reitich
Despite significant recent advances in numerical methodologies for simulating rough-surface acoustic scattering, their applicability has been constrained by the limitations of state-of-the-art computational resources. This has been particularly true in high-frequency applications where the sheer siz ... [J. Acoust. Soc. Am. 123, 2531 (2008)] published Fri May 9, 2008.
High-Reynolds-number turbulent-boundary-layer wall pressure fluctuations with skin-friction reduction by air injection
Eric S. Winkel, Brian R. Elbing, Steven L. Ceccio, Marc Perlin, and David R. Dowling
The hydrodynamic pressure fluctuations that occur on the solid surface beneath a turbulent boundary layer are a common source of flow noise. This paper reports multipoint surface pressure fluctuation measurements in water beneath a high-Reynolds-number turbulent boundary layer with wall injection of ... [J. Acoust. Soc. Am. 123, 2522 (2008)] published Fri May 9, 2008.
Multilevel fast multipole algorithm for acoustic wave scattering by truncated ground with trenches
Mei Song Tong, Weng Cho Chew, and Michael J. White
The multilevel fast multipole algorithm (MLFMA) is extended to solve for acoustic wave scattering by very large objects with three-dimensional arbitrary shapes. Although the fast multipole method as the prototype of MLFMA was introduced to acoustics early, it has not been used to study acoustic prob ... [J. Acoust. Soc. Am. 123, 2513 (2008)] published Fri May 9, 2008.
Collective bubble oscillations as a component of surf infrasound
Joseph Park, Milton Garces, David Fee, and Geno Pawlak
Plunging surf is a known generator of infrasound, though the mechanisms have not been clearly identified. A model based on collective bubble oscillations created by demise of the initially entrained air pocket is examined. Computed spectra are compared to infrasound data from the island of Kauai dur ... [J. Acoust. Soc. Am. 123, 2506 (2008)] published Fri May 9, 2008.
Effect of an entrained air bubble on the acoustics of an ink channel
Roger Jeurissen, Jos de Jong, Hans Reinten, Marc van den Berg, Herman Wijshoff et al.
Piezo-driven inkjet systems are very sensitive to air entrapment. The entrapped air bubbles grow by rectified diffusion in the ink channel and finally result in nozzle failure. Experimental results on the dynamics of fully grown air bubbles are presented. It is found that the bubble counteracts the ... [J. Acoust. Soc. Am. 123, 2496 (2008)] published Fri May 9, 2008.
Cubic nonlinearity in shear wave beams with different polarizations
Mark S. Wochner, Mark F. Hamilton, Yurii A. Ilinskii, and Evgenia A. Zabolotskaya
A coupled pair of nonlinear parabolic equations is derived for the two components of the particle motion perpendicular to the axis of a shear wave beam in an isotropic elastic medium. The equations account for both quadratic and cubic nonlinearity. The present paper investigates, analytically and nu ... [J. Acoust. Soc. Am. 123, 2488 (2008)] published Fri May 9, 2008.
The high-frequency dispersion coefficient for the Rayleigh velocity in a vertically inhomogeneous anisotropic half-space
A. L. Shuvalov
For an arbitrary anisotropic half-space with continuous vertical variation of material properties, an explicit closed-form expression for the coefficient B of high-frequency dispersion of the Rayleigh velocity v(omega)[approximate]v(1+B/omega) is derived. The result involves two matrices, one consis ... [J. Acoust. Soc. Am. 123, 2484 (2008)] published Fri May 9, 2008.
On the conservation of momentum for a sound pulse reflecting from a pressure-release boundary
A. G. Voronovich
When a massless one-dimensional sound pulse (mass of a sound pulse is defined as an integral of the perturbation of density over the pulse length) reflects from a pressure-release boundary, its momentum changes sign. This obviously violates momentum conservation. However, in contrast to the case of ... [J. Acoust. Soc. Am. 123, 2480 (2008)] published Fri May 9, 2008.
Influence of vehicle color on loudness judgments
Daniel Menzel, Hugo Fastl, Ralf Graf, and Jurgen Hellbruck
This experiment investigates the effect of images of differently colored sports cars on the loudness of a simultaneously perceived car sound. Still images of a sports car, colored in red, light green, blue, and dark green, were displayed to subjects during a magnitude estimation task. The sound of a ... [J. Acoust. Soc. Am. 123, 2477 (2008)] published Fri May 9, 2008.
Systems and methods for automatic time-gain compensation !n an ultrasound imaging system
Shashidhar Sathyanarayana
... [J. Acoust. Soc. Am. 123, 2475 (2008)] published Fri May 9, 2008.
Transducer arrays with an integrated sensor and methods of use
Stephen R. Barnes and Mirsaid Bolorforosh
... [J. Acoust. Soc. Am. 123, 2475 (2008)] published Fri May 9, 2008.
Ultrasonic diagnostic apparatus and image processing apparatus
Naohisa Kamiyama
... [J. Acoust. Soc. Am. 123, 2474 (2008)] published Fri May 9, 2008.
Wide aperture array design with constrained outer probe dimension
Bjorn A. J. Angelsen
... [J. Acoust. Soc. Am. 123, 2474 (2008)] published Fri May 9, 2008.
Ultrasound method and apparatus for multi-line acquisition
Kjell Kristoffersen
... [J. Acoust. Soc. Am. 123, 2474 (2008)] published Fri May 9, 2008.
Method for optimization of transmit and receive ultrasound pulses, particularly for ultrasonic imaging
Andrea Trucco and Simone Curletto
... [J. Acoust. Soc. Am. 123, 2474 (2008)] published Fri May 9, 2008.
Immersible ultrasound probe and cable
Kenneth N. Bates
... [J. Acoust. Soc. Am. 123, 2474 (2008)] published Fri May 9, 2008.
Homonym processing in the context of voice-activated command systems
Yun-Cheng Ju
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Sensor based approach recognizer selection, adaptation and combination
Volker Fischer and Siegfried Kunzmann
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Systems and methods for sound compression
Jerome D. Wong
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Language input architecture for converting one text form to another text form with tolerance to spelling, typographical, and conversion errors
Kai-Fu Lee
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Insert earphone assembly for audiometric testing and method for making same
Donald L. Wilson and Steven J. Iseberg
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Instrument with an interface frame and a process for production thereof
George Doudoukjian
... [J. Acoust. Soc. Am. 123, 2473 (2008)] published Fri May 9, 2008.
Synchronized processing of ear shells for hearing aids
Tong Fang
... [J. Acoust. Soc. Am. 123, 2472 (2008)] published Fri May 9, 2008.
Method for activating a hearing device
Stefan Daniel Menzl and Ivo Hasler
... [J. Acoust. Soc. Am. 123, 2472 (2008)] published Fri May 9, 2008.
Dynamic compression in a hearing aid
Brian Dam Pedersen
... [J. Acoust. Soc. Am. 123, 2472 (2008)] published Fri May 9, 2008.
Hearing device
Andi Vonlanthen and Hilmar Meier
... [J. Acoust. Soc. Am. 123, 2472 (2008)] published Fri May 9, 2008.
Bone conduction hearing assistance device
Daniel R. Schumaier
... [J. Acoust. Soc. Am. 123, 2472 (2008)] published Fri May 9, 2008.
Hearing aid and method for adjusting a hearing aid
Torsten Niederdrank and Christian Weistenhofer
... [J. Acoust. Soc. Am. 123, 2471 (2008)] published Fri May 9, 2008.
Extended wear canal device with common microphone-battery air cavity
Adnan Shennib
... [J. Acoust. Soc. Am. 123, 2471 (2008)] published Fri May 9, 2008.
Method and apparatus for minimally invasive placement of sensing and driver assemblies to improve hearing loss
Johann J. Neisz
... [J. Acoust. Soc. Am. 123, 2471 (2008)] published Fri May 9, 2008.
Apparatus and method for inspecting containers
Paul Belanger
... [J. Acoust. Soc. Am. 123, 2471 (2008)] published Fri May 9, 2008.
Saw identification tag discrimination methods
Clinton S. Hartmann and John C. Bellamy
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Passive tire pressure sensor and method
Kent Bryant Pfeifer
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Ultrasonic transmitting/receiving apparatus and scanning sonar employing same
Yasushi Nishimori
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Mobile communications terminal device and method for identifying incoming call for use with the same
Kazuhiro Kudoh
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Sensor apparatus
Eric Atherton
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Piezooscillator
Kenji Kasahara
... [J. Acoust. Soc. Am. 123, 2470 (2008)] published Fri May 9, 2008.
Glass laminates for reduction of sound transmission
Jerrel C. Anderson
... [J. Acoust. Soc. Am. 123, 2469 (2008)] published Fri May 9, 2008.
Damping material, damping arrangement and method for designing a damping arrangement
Laurent Bonnet
... [J. Acoust. Soc. Am. 123, 2469 (2008)] published Fri May 9, 2008.
Multi-channel active control system and method for the reduction of tonal noise from an axial fan
Scott D. Sommerfeldt and Kent L. Gee
... [J. Acoust. Soc. Am. 123, 2469 (2008)] published Fri May 9, 2008.
Automotive floor panel structure
Takanobu Kamura
... [J. Acoust. Soc. Am. 123, 2469 (2008)] published Fri May 9, 2008.
Composite material with improved structural, acoustic and thermal properties
Enamul Haque
... [J. Acoust. Soc. Am. 123, 2469 (2008)] published Fri May 9, 2008.
Method and apparatus for vibration detection, method and apparatus for vibration analysis, lithographic apparatus, device manufacturing method, and computer program
Haico Victor Kok
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Portable system for measuring dynamic pressure in situ and method of employment therefor
Fred D. Shirley
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
System and method for controlling vibration
Raymond Chin
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Method for reducing juddering vibrations
Boris Serebrennikov
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Passive damping of vibrations in a support structure
Ka Shing Kenny Kwan
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Isolator mount for shock and vibration mitigation
Bruce Bower and Gareth Knowles
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Vibration test module having controllable vibration attributes
Gregg K. Hobbs
... [J. Acoust. Soc. Am. 123, 2468 (2008)] published Fri May 9, 2008.
Composite bushing having dual damping capability
Erich Hees
... [J. Acoust. Soc. Am. 123, 2467 (2008)] published Fri May 9, 2008.
Acoustical Standards News
... [J. Acoust. Soc. Am. 123, 2454 (2008)] published Fri May 9, 2008.
New Fellows of the Acoustical Society of America
... [J. Acoust. Soc. Am. 123, 2443 (2008)] published Fri May 9, 2008.
Tunable stacked plate vibration isolator
Morris S. Berman
... [J. Acoust. Soc. Am. 123, 2467 (2008)] published Fri May 9, 2008.
Narrowband phase difference measurement technique for sonar applications
Byron W. Tietjen and Thaddeus J. Kurpiewski
... [J. Acoust. Soc. Am. 123, 2467 (2008)] published Fri May 9, 2008.
Remote pipeline acoustic inspection
Mohammad N. Shamout
... [J. Acoust. Soc. Am. 123, 2467 (2008)] published Fri May 9, 2008.
Mobile terminal
Byung Jin Ahn
... [J. Acoust. Soc. Am. 123, 2467 (2008)] published Fri May 9, 2008.
Helmet-mounted intercommunications and entertainment system
William E. Davis
... [J. Acoust. Soc. Am. 123, 2466 (2008)] published Fri May 9, 2008.
Electronic device
Ukyo Mori
... [J. Acoust. Soc. Am. 123, 2466 (2008)] published Fri May 9, 2008.
Device for driving vibration source
Masao Noro
... [J. Acoust. Soc. Am. 123, 2466 (2008)] published Fri May 9, 2008.
Passive saw-based hydrogen sensor and system
Jacqueline H. Hines and Leland P. Solie
... [J. Acoust. Soc. Am. 123, 2466 (2008)] published Fri May 9, 2008.
Acoustic wave touch detection circuit and method
Terence J. Knowles
... [J. Acoust. Soc. Am. 123, 2466 (2008)] published Fri May 9, 2008.
Electret capacitor microphone and method for producing the same
Motoaki Ito and Kentaro Yonehara
... [J. Acoust. Soc. Am. 123, 2465 (2008)] published Fri May 9, 2008.
Dual-tweeter loudspeaker
Dean M. Rivera
... [J. Acoust. Soc. Am. 123, 2465 (2008)] published Fri May 9, 2008.
In-wall speaker system method and apparatus
Paul N. Hagman
... [J. Acoust. Soc. Am. 123, 2465 (2008)] published Fri May 9, 2008.
Sound control apparatus
Harold N. Smith, Jr. and Harold N. Smith III
... [J. Acoust. Soc. Am. 123, 2464 (2008)] published Fri May 9, 2008.
Acoustic/underwater signaling device
Andres Etchenique
... [J. Acoust. Soc. Am. 123, 2464 (2008)] published Fri May 9, 2008.
Electromagnetic driver for a planar diaphragm loudspeaker
Wolfgang Bachmann
... [J. Acoust. Soc. Am. 123, 2464 (2008)] published Fri May 9, 2008.
Loudspeaker low profile quarter wavelength transmission line and enclosure and method
Joseph Y. Sahyoun
... [J. Acoust. Soc. Am. 123, 2464 (2008)] published Fri May 9, 2008.
Acoustic transducer
Gerard Hendrik Josephus De Vries
... [J. Acoust. Soc. Am. 123, 2463 (2008)] published Fri May 9, 2008.
Multi piston electro-mechanical transduction apparatus
Alexander L. Butler and John L. Butler
... [J. Acoust. Soc. Am. 123, 2463 (2008)] published Fri May 9, 2008.
Resonator device and circuits for 3-D detection/receiving sonic waves, even of a very low amplitude/frequency, suitable for use in cybernetics
Daniele Ramenzoni
... [J. Acoust. Soc. Am. 123, 2463 (2008)] published Fri May 9, 2008.
Loudspeaker
Leonard Kreitmeier and Jurgen Ringlstetter
... [J. Acoust. Soc. Am. 123, 2463 (2008)] published Fri May 9, 2008.
Estimation of background noise and its effect on sonar range estimation
Nathan Intrator
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Underwater sound radiation apparatus
Takayuki Watanabe and Shinji Kishinaga
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Transducer assembly for megasonic processing of an article and apparatus utilizing the same
Mario E. Bran
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Microelectromechanical resonant photoacoustic cell
Ronald G. Polcawich and Paul Pellegrino
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Method and apparatus for seismic data acquisition
Clifford H. Ray
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Resolving directional information in sonar arrays
Rory Niland
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
Method and apparatus for correlation sonar
Anthony L. Scoca
... [J. Acoust. Soc. Am. 123, 2462 (2008)] published Fri May 9, 2008.
System for reporting high resolution ocean pressures in near real time for the purpose of tsunami monitoring
Christian Meinig
... [J. Acoust. Soc. Am. 123, 2461 (2008)] published Fri May 9, 2008.
ACOUSTIC FLUID MACHINE
Masaaki Kawahashi
... [J. Acoust. Soc. Am. 123, 2461 (2008)] published Fri May 9, 2008.
Bayesian Bounds for Parameter Estimation and Nonlinear Filtering/Tracking
Harry L. Van Trees, Kristine L. Bell, and STAN DOSSO
... [J. Acoust. Soc. Am. 123, 2460 (2008)] published Fri May 9, 2008.
Bayesian Bounds for Parameter Estimation and Nonlinear Filtering/Tracking
Harry L. Van Trees, Kristine L. Bell, and STAN DOSSO
... [J. Acoust. Soc. Am. 123, 2459 (2008)] published Fri May 9, 2008.
Fundamentals of Voice Quality Engineering in Wireless Networks
Avi Perry and John Beerends
... [J. Acoust. Soc. Am. 123, 2459 (2008)] published Fri May 9, 2008.