journal
MENU ▼
Read by QxMD icon Read
search

Journal of the Acoustical Society of America

journal
https://www.readbyqxmd.com/read/27908095/the-effect-of-frequency-cueing-on-the-perceptual-segregation-of-simultaneous-tones-bottom-up-and-top-down-contributions
#1
Yi Shen
Listeners were presented with two simultaneous tones of different frequencies (more than one octave apart) and asked to identify the tone that was amplitude-modulated while a tonal precursor was presented to cue the frequency of the lower frequency tone. Performance thresholds were estimated based on the duration of the tone-pair. In Exp. I the duration of the precursor varied from 100 to 400 ms and the inter-stimulus interval (ISI) between the precursor and the tone-pair varied from 0 to 1 s. The presence of the precursor facilitated segregation...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908094/the-effects-of-physiological-adjustments-on-the-perceptual-and-acoustical-characteristics-of-vibrato-as-a-model-of-vocal-tremor
#2
Rosemary A Lester-Smith, Brad H Story
The purpose of this study was to investigate the effects of physiological adjustments on listeners' perception of the magnitude of modulation of voice and to determine the characteristics of the acoustical modulations that explained listeners' judgments. This research was carried out using singers producing vibrato as a model of vocal tremor. Twenty healthy adults participated in a perceptual study involving pair-comparisons of the magnitude of "shakiness" with singers' samples, which differed by fundamental frequency, vocal quality, and vowel...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908093/sound-production-on-a-coaxial-saxophone
#3
J-B Doc, C Vergez, P Guillemain, J Kergomard
Sound production on a "coaxial saxophone" is investigated experimentally. The coaxial saxophone is a variant of the cylindrical saxophone made up of two tubes mounted in parallel, which can be seen as a low-frequency analogy of a truncated conical resonator with a mouthpiece. Initially developed for the purposes of theoretical analysis, an experimental verification of the analogy between conical and cylindrical saxophones has never been reported. The present paper explains why the volume of the cylindrical saxophone mouthpiece limits the achievement of a good playability...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908092/the-effect-of-cubic-material-nonlinearity-on-the-propagation-of-torsional-wave-modes-in-a-pipe
#4
Yanzheng Wang, Jan D Achenbach
The effect of cubic material nonlinearity on the propagation in a pipe of the lowest axially symmetric torsional wave mode has been investigated in this paper. Two cases, one that the material of the whole pipe is nonlinear, and the second that a small segment of the pipe is nonlinear, have been considered. For the first case, a first and a third harmonic have been obtained by the perturbation method. Analytical expressions for the two cumulative harmonics have been derived. The second case leads to a scattering problem...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908091/higher-order-acoustoelastic-lamb-wave-propagation-in-stressed-plates
#5
Ning Pei, Leonard J Bond
Modeling and experiments are used to investigate Lamb wave propagation in the direction perpendicular to an applied stress. Sensitivity, in terms of changes in velocity, for both symmetrical and anti-symmetrical modes was determined. Codes were developed based on analytical expressions for waves in loaded plates and they were used to give wave dispersion curves. The experimental system used a pair of compression wave transducers on variable angle wedges, with set separation, and variable frequency tone burst excitation, on an aluminum plate 0...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908090/identifying-the-dominating-perceptual-differences-in-headphone-reproduction
#6
Christer P Volk, Mathieu Lavandier, Søren Bech, Flemming Christensen
The perceptual differences between the sound reproductions of headphones were investigated in a pair-wise comparison study. Two musical excerpts were reproduced over 21 headphones positioned on a mannequin and recorded. The recordings were then processed and reproduced over one set of headphones to listeners, who were asked to evaluate their perceived degree of dissimilarity. The two musical excerpts were used in separate experiments. The processing of the recordings consisted of compensating for the influences of the playback headphones worn by the listeners as well as for the mannequin's ear canals...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908089/vibration-analysis-of-coupled-conical-cylindrical-spherical-shells-using-a-fourier-spectral-element-method
#7
Zhu Su, Guoyong Jin
This paper presents a Fourier spectral element method (FSEM) to analyze the free vibration of conical-cylindrical-spherical shells with arbitrary boundary conditions. Cylindrical-conical and cylindrical-spherical shells as special cases are also considered. In this method, each fundamental shell component (i.e., cylindrical, conical, and spherical shells) is divided into appropriate elements. The variational principle in conjunction with first-order shear deformation shell theory is employed to model the shell elements...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908088/acoustically-diverse-vocalization-repertoire-in-the-himalayan-leaf-nosed-bat-a-widely-distributed-hipposideros-species
#8
Aiqing Lin, Tinglei Jiang, Jiang Feng, Jagmeet S Kanwal
Insectivorous bats vocalize to both communicate with conspecifics and to echolocate. The communicative vocalizations or "calls" of bats either consist of or are constructed from discrete acoustic units, termed "syllables." This study examined syllable diversity in the Himalayan leaf-nosed bat, Hipposideros armiger, a species that is widely distributed across Southeast Asia. This social species' vocalizations were hypothesized to consist of a wide variety of syllables facilitating its social interactions. To test this hypothesis, multiple acoustic parameters were measured from recorded vocalizations to map the acoustic boundaries of syllables...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908087/erratum-analysis-and-modeling-of-255-ship-source-levels-from-an-acoustic-observatory-along-st-lawrence-seaway-j-acoust-soc-am-140-3-2002-2018-2016
#9
Yvan Simard, Nathalie Roy, Cédric Gervaise, Samuel Giard
No abstract text is available yet for this article.
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908086/identification-of-the-rayleigh-surface-waves-for-estimation-of-viscoelasticity-using-the-surface-wave-elastography-technique
#10
Xiaoming Zhang
The purpose of this Letter to the Editor is to demonstrate an effective method for estimating viscoelasticity based on measurements of the Rayleigh surface wave speed. It is important to identify the surface wave mode for measuring surface wave speed. A concept of start frequency of surface waves is proposed. The surface wave speeds above the start frequency should be used to estimate the viscoelasticity of tissue. The motivation was to develop a noninvasive surface wave elastography (SWE) technique for assessing skin disease by measuring skin viscoelastic properties...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908085/age-effects-in-discrimination-of-intervals-within-accented-tone-sequences-differing-in-accent-type-and-sequence-presentation-rate
#11
Peter J Fitzgibbons, Sandra Gordon-Salant
The study measured listener sensitivity to increments in the duration of one or two target silent intervals embedded within unaccented tone sequences and sequences that featured a single accented component. The baseline unaccented sequences consisted of six 1000-Hz 40-ms tone bursts that were separated equally by silent intervals to establish a slower tone sequence rate, with tonal inter-onset intervals (IOIs) set to 200 ms, or a faster rate with tonal IOIs set to 100 ms. Stimulus accent was created by doubling the baseline duration of a single sequence component, either the second tone burst (tonal accent), or the second tonal IOI (interval accent)...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908084/a-robust-automatic-birdsong-phrase-classification-a-template-based-approach
#12
Kantapon Kaewtip, Abeer Alwan, Colm O'Reilly, Charles E Taylor
Automatic phrase detection systems of bird sounds are useful in several applications as they reduce the need for manual annotations. However, birdphrase detection is challenging due to limited training data and background noise. Limited data occur because of limited recordings or the existence of rare phrases. Background noise interference occurs because of the intrinsic nature of the recording environment such as wind or other animals. This paper presents a different approach to birdsong phrase classification using template-based techniques suitable even for limited training data and noisy environments...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908083/perceptual-thresholds-for-non-ideal-diffuse-field-reverberation
#13
David Romblom, Catherine Guastavino, Philippe Depalle
The objective of this study is to understand listeners' sensitivity to directional variations in non-ideal diffuse field reverberation. An ABX discrimination test was conducted using a semi-spherical 28-loudspeaker array; perceptual thresholds were estimated by systematically varying the level of a segment of loudspeakers for lateral, height, and frontal conditions. The overall energy was held constant using a gain compensation scheme. When compared to an ideal diffuse field, the perceptual threshold for detection is -2...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908082/objective-and-perceptual-evaluation-of-distance-dependent-scattered-sound-effects-in-a-small-variable-acoustics-hall
#14
Louena Shtrepi, Arianna Astolfi, Gianluca D'Antonio, Martin Guski
Performance spaces are characterized by a complex sound field, due to the presence of absorptive and diffusive surfaces. In situ evaluations of the acoustic effects that these surfaces have on the objective acoustic parameters and on sound perception have not yet been fully understood. To this aim, acoustic measurements have been performed in a variable-acoustic concert hall, the Espace de Projection, at the Institut de Recherche et Coordination Acoustique/Musique. These measurements have allowed the effects of one single wall to be determined...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908081/word-specific-effects-on-sound-change-of-the-lexical-pitch-accent-in-kyungsang-korean
#15
Hyunjung Lee
This study investigated word-specific effects for the on-going sound change of the lexical pitch accent of Kyungsang Korean, arguably induced by influence from the standard Seoul Korean. This study tested whether Kyungsang speakers produced and perceived words used only in Kyungsang areas differently from the words used both in Seoul and Kyungsang areas. In production and perception experiments, Kyungsang speakers exhibited more conservative patterns for the word used only in the Kyungsang area compared to the other type of words...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908080/behavioral-manifestations-of-audiometrically-defined-slight-or-hidden-hearing-loss-revealed-by-measures-of-binaural-detection
#16
Leslie R Bernstein, Constantine Trahiotis
This study assessed whether audiometrically-defined "slight" or "hidden" hearing losses might be associated with degradations in binaural processing as measured in binaural detection experiments employing interaurally delayed signals and maskers. Thirty-one listeners participated, all having no greater than slight hearing losses (i.e., no thresholds greater than 25 dB HL). Across the 31 listeners and consistent with the findings of Bernstein and Trahiotis [(2015). J. Acoust. Soc. Am. 138, EL474-EL479] binaural detection thresholds at 500 Hz and 4 kHz increased with increasing magnitude of interaural delay, suggesting a loss of precision of coding with magnitude of interaural delay...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908079/using-line-acceleration-to-measure-false-killer-whale-pseudorca-crassidens-click-and-whistle-source-levels-during-pelagic-longline-depredation
#17
Aaron Thode, Lauren Wild, Janice Straley, Dustin Barnes, Ali Bayless, Victoria O'Connell, Erin Oleson, Jit Sarkar, Dan Falvey, Linda Behnken, Sean Martin
False killer whales (Pseudorca crassidens) depredate pelagic longlines in offshore Hawaiian waters. On January 28, 2015 a depredation event was recorded 14 m from an integrated GoPro camera, hydrophone, and accelerometer, revealing that false killer whales depredate bait and generate clicks and whistles under good visibility conditions. The act of plucking bait off a hook generated a distinctive 15 Hz line vibration. Two similar line vibrations detected at earlier times permitted the animal's range and thus signal source levels to be estimated over a 25-min window...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908078/kirchhoff-approximation-for-backscattering-from-a-partially-exposed-rigid-sphere-at-a-flat-interface
#18
Aaron M Gunderson, Philip L Marston
The Kirchhoff approximation (KA) is used to model backscatter of sound from a partially exposed, rigid sphere at a flat free interface of two homogenous media. Scattered wavefields are calculated through numerical integration on the sphere of the Kirchhoff integral, requiring detailed knowledge of the illuminated region for each scattering path. This approach avoids amplitude discontinuities resulting from geometric transitions in the number of reflected rays. Reflections from the interface are modeled through use of an image source, positioned symmetrically relative to the real source...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908077/tropical-littoral-ambient-noise-probability-density-function-model-based-on-sea-surface-temperature
#19
Piyush Asolkar, Arnab Das, Suhas Gajre, Yashwant Joshi
Ambient noise variability in tropical shallow water presents a critical challenge for sonar designers and operators due to site-specific sea surface fluctuations. Sea surface temperature (SST) is a direct measure of energy balance defining the local climate of the region and hence ambient noise characteristics. In this work, an ambient noise probability density function (pdf) model for a spectral band of 3-10 kHz has been designed based on the statistical distribution of SST and validated using real field data...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908076/experimental-observation-of-piezoelectric-effect-in-cancellous-bone-generated-by-ultrasound-irradiation
#20
A Hosokawa
In this study, piezoelectric cells (PE-cells) of cancellous bone were experimentally produced to receive an ultrasound wave. In the PE-cell, a bovine cancellous bone specimen, in which the pore spaces were saturated with air, was electrically shielded to prevent electromagnetic noise. As a result, the piezoelectric signal generated in the cancellous bone specimen by irradiating an ultrasound burst wave at 1.0 MHz could be clearly observed in water. The experimental results showed that the ultrasound sensitivity per unit area of cancellous bone was estimated to be below 1/100 and 1/100 000 of cortical bone and poly(vinylidene fluoride), respectively...
November 2016: Journal of the Acoustical Society of America
journal
journal
25741
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"