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27 Hits in 8.8 sec

Barge-In- And Noise-Free Spoken Dialogue Interface Based On Sound Field Control And Semi-Blind Source Separation

Shigeki Miyabe, Tomoya Takatani, Hiroshi SARUWATARI, Kiyohiro Shikano, Yosuke Tatekura
2007 Zenodo  
Most of the algorithms to adapt both adaptive beamformer (ABF) and acoustic echo canceller (AEC) are based on minimization of mean square error [2] .  ...  For this purpose its filters must be learned only when the desired signal source is inactive. Thus ABF requires double-talk detector (DTD) to find such durations [4] .  ... 
doi:10.5281/zenodo.40251 fatcat:vfgabkb2mvdddlxtbnmxjasdfe

Coded excitation and subband processing for blood velocity estmation in medical ultrasound

Fredrik Gran, Jorgen Arendt Jensen, Jesper Udesen, Michael Bachmann Nielsen
2007 Journal of the Acoustical Society of America  
Based on recent development in nonclassic nonlinear acoustic theory, a phase shift method is used to determine the hysteretic nonlinearity parameter of a field soil.  ...  A custom designed shallow insert communication earplug for helicopter crews consists of a system based on a patented hybrid ANR feedbackfeedforward algorithm ͓Ray et al., J. Acoust. Soc.  ...  The general formalism is illustrated in an example of sonar-based target tracking for antisubmarine warfare.  ... 
doi:10.1121/1.4782191 fatcat:cfka7odi35dihhbjgn5nqb3i7y

Enhancing the durational enhancement of a tone contrast

Carlos Gussenhoven
2006 Journal of the Acoustical Society of America  
An advanced measuring system for the analysis of vibrating structures is based on a laser scanning vibration interferometer.  ...  The first goal of this talk is to explore why surround-sound systems generally work well in a variety of common settings, even though the acoustic effects of the rooms in which they are used can differ  ...  In this paper, a newly developed and tested time domain model for acoustic scattering from moving 2-D surfaces ͓J. Acoust. Soc.  ... 
doi:10.1121/1.4786135 fatcat:7wt7lq7gmfbk5mbm3fxedjriaa

Compromises in orchestra pit design: A ten‐year trench war in The Royal Theatre, Copenhagen

Anders Chr. Gade, Bo Mortensen
1998 Journal of the Acoustical Society of America  
A full-wave model based on a set of nonlinear acoustic time domain equations is applied.  ...  An important improvement of scores is obtained with the stereophonic system.  ...  Acoustic measures of the stimuli were generally consistent with the perceptual patterns.  ... 
doi:10.1121/1.422278 fatcat:l4rayw2q4ja6demlq46irqfu4m

Simultaneous measurements of room‐acoustic parameters using different measuring equipment?

Tor Halmrast, Anders Gade, Bjorn Winsvold
1998 Journal of the Acoustical Society of America  
A full-wave model based on a set of nonlinear acoustic time domain equations is applied.  ...  An important improvement of scores is obtained with the stereophonic system.  ...  Acoustic measures of the stimuli were generally consistent with the perceptual patterns.  ... 
doi:10.1121/1.422575 fatcat:fofoye2ypjho5nhhtqgr4fvczm

Spherical near field acoustic holography with microphones on a rigid sphere

Finn Jacobsen, Jo/rgen Hald, Efrén Fernandez, Guillermo Moreno
2008 Journal of the Acoustical Society of America  
The poor quality of clarity was assessed for churches with longest EDT for the performance of music involving polyphony.  ...  The results of the audience and expert scores were then statistically analyzed and correlated with a set of room acoustic indices which had been measured in the same locations.  ...  Ultraviolet detector based on a surface acoustic wave oscillator system with ZnO-nanostructure sensing material.  ... 
doi:10.1121/1.2934035 fatcat:57w2rziyfvcmnnyzsxlgg43qxa

Parameter survey of a rib stiffened wooden floor using sinus modes model

Lars‐Göran Sjökvist, Jonas Brunskog, Finn Jacobsen
2008 Journal of the Acoustical Society of America  
The poor quality of clarity was assessed for churches with longest EDT for the performance of music involving polyphony.  ...  The results of the audience and expert scores were then statistically analyzed and correlated with a set of room acoustic indices which had been measured in the same locations.  ...  Ultraviolet detector based on a surface acoustic wave oscillator system with ZnO-nanostructure sensing material.  ... 
doi:10.1121/1.2933934 fatcat:fmeouf2iynctnculdxzvoqb4iu

Measurement of total sound energy density in enclosures at low frequencies

Finn Jacobsen
2008 Journal of the Acoustical Society of America  
The poor quality of clarity was assessed for churches with longest EDT for the performance of music involving polyphony.  ...  The results of the audience and expert scores were then statistically analyzed and correlated with a set of room acoustic indices which had been measured in the same locations.  ...  Ultraviolet detector based on a surface acoustic wave oscillator system with ZnO-nanostructure sensing material.  ... 
doi:10.1121/1.2934233 fatcat:vuavezpbsnabxmhi4jlbvbwgly

Underwater noise due to precipitation

Lawrence A. Crum, Hugh C. Pumphrey, Andrea Prosperetti, Leif Bjorno
1989 Journal of the Acoustical Society of America  
Several years ago, ocean acoustics gave birth to acoustical oceanography.  ...  Sound propagation is the preeminent technique for sensing, identifying, and communicating under the ocean surface.  ...  Understanding the limits of these two regimes is crucial for developing the new generation of ocean acoustic tomography systems based on the full-wave theoretical S70 J. Acoust. Soc. Am.  ... 
doi:10.1121/1.2026824 fatcat:xbwjl6wggjh5xee7ci2vcphfd4

Nonlinear acoustics of water‐saturated marine sediments

Leif Bjørnø
1976 Journal of the Acoustical Society of America  
Synthetic room impulse responses were generated on a digital computer based on an image model of a roorn.  ...  The system was recently tested with a 1011-word voeabular? language permitting about 10 •z possible sentences for an Information Retrieval task using a computerized data base.  ...  The method is based on a "nonlinear" regression analysis involving both the acoustic parameters and their products.  ... 
doi:10.1121/1.2003625 fatcat:xzwtedhhn5b2rfurl3f246z6m4

The structural acoustic properties of stiffened shells

Yu Luan
2008 Journal of the Acoustical Society of America  
During the 1990s acoustic criteria for injury were designated based upon temporary hearing loss.  ...  generated by jet aircrafts.  ...  This work presents analysis of a proposed acoustic echo cancellation system that operates in the spherical harmonic domain.  ... 
doi:10.1121/1.2932806 fatcat:zohbewf2k5h7fly2hoqzfdk42e

Comparison of procedures for determination of acoustic nonlinearity of some inhomogeneous materials

L. Bjørnø
1983 Journal of the Acoustical Society of America  
It allows the flexible combination of information from a score in the computer memory with information generated by the performer playing on a keyboard or on other sensors.  ...  This provides an attractive model for lexical access based on partial phonetic information.  ...  system on which such behavior is based.  ... 
doi:10.1121/1.2020879 fatcat:eid6pixobjetzhkfpo6h2okzua

Acoustic GIS‐based monitoring of Atlantic cod ecosystems in coastal Newfoundland

George A. Rose
2008 Journal of the Acoustical Society of America  
During the 1990s acoustic criteria for injury were designated based upon temporary hearing loss.  ...  generated by jet aircrafts.  ...  This work presents analysis of a proposed acoustic echo cancellation system that operates in the spherical harmonic domain.  ... 
doi:10.1121/1.2932540 fatcat:v6w3j7upx5duhkunch6oai5jve

Trends in preference, programming and design of concert halls for symphonic music

Anders C. Gade
2008 Journal of the Acoustical Society of America  
This work presents analysis of a proposed acoustic echo cancellation system that operates in the spherical harmonic domain.  ...  Surround sound echo cancellation in the spherical harmonic domain.  ...  The second algorithm deals with single words and is based on phoneme score. Both algorithms are evaluated with a corpus of typed answers based on three different Dutch speech materials.  ... 
doi:10.1121/1.2932471 fatcat:hhka5ml2fvcszklkzau2lw3gka

Investigating the buildup of precedence effect using reflection masking

Jess Hartcher‐O'Brien, M. Buchholz, M. Buchholz
2006 Journal of the Acoustical Society of America  
The acoustic enhancement system is a specialized audio system, separate from the main reinforcement audio system, based on LARES digital signal processing and a distributed loudspeaker approach.  ...  With reliance on the audio systems to project and envelop the audience in sound, the design of the stage enclosure was able to focus on the acoustic quality for the ensemble, a rare opportunity in outdoor  ...  Based on this concept, with implementation of simplifications not deteriorating the perceptual quality, a system for variable acoustics was developed: acoustic control system ͑ACS͒.  ... 
doi:10.1121/1.4787437 fatcat:4h2rmntypzabhiivz7ddvu5uai
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