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Acoustic Model Adaptation Using Piece-Wise Energy Decay Curve For Reverberant Environments

Hari Krishna Maganti, Marco Matassoni, Waheed Mohammed, Maurizio Omologo
2012 Zenodo  
Therefore, in this work we use a better model for creating the piece-wise energy decay curve (Pw-EDC) which approximates the decay of both reflections in a precise way.  ...  ADAPTATION USING PIECE-WISE ENERGY DECAY CURVE In order to model the Pw-EDC, the boundaries of early and late reflections need to be defined.  ... 
doi:10.5281/zenodo.52287 fatcat:2zjicy6by5eepb4bx2kqwgyj5y

Deriving content-specific measures of room acoustic perception using a binaural, nonlinear auditory model

Jasper van Dorp Schuitman, Diemer de Vries, Alexander Lindau
2013 Journal of the Acoustical Society of America  
Acousticians generally assess the acoustic qualities of a concert hall or any other room using impulse response-based measures such as the reverberation time, clarity index, and others.  ...  These parameters are used to predict perceptual attributes related to the acoustic qualities of the room.  ...  Accordingly, reflections in the impulse response with an energy below a decaying curve defined by this law contribute to the precedence effect (and therefore to ASW), and reflections with energy above  ... 
doi:10.1121/1.4789357 pmid:23464027 fatcat:u2jwzaskkzanzmgz3b2ke3aulu

Reverberant speech recognition exploiting clarity index estimation

Pablo Peso Parada, Dushyant Sharma, Patrick A. Naylor, Toon van Waterschoot
2015 EURASIP Journal on Advances in Signal Processing  
model adaptation, i.e. using multi-condition hidden Markov models (HMMs).  ...  Our best performing method includes the estimated value of C 50 in the ASR feature vector and also uses C 50 to select the most suitable ASR acoustic model according to the reverberation level.  ...  The idea in [24] is to add to the current state the contribution of previous acoustic model states using a piece-wise energy decay curve which considers the early reflections and late reverberation as  ... 
doi:10.1186/s13634-015-0237-7 fatcat:ocmeq5uulvhhplwtq2gutxynre

EXPERIMENTAL INVESTIGATIONS AND COMPUTER SIMULATIONS TO SOLVE ACOUSTIC PROBLEMS IN THE MODERN CHURCH

Anna SYGULSKA, Tomasz CZERNIAK, Adrian CZARNY-KROPIWNICKI
2018 Engineering Structures and Technologies  
The study discusses issues of the modern Catholic church, where acoustic problems surface as high reverberant noise levels.  ...  On the basis of in situ investigations, a computer model of the church was built and a series of simulations were carried out to determine correct treatment in order to achieve satisfactory acoustic conditions  ...  Reverberation time RT is defined as the time for the sound to decay to a level 60 dB below its original level. It is determined on the basis of the sound decay curve.  ... 
doi:10.3846/2029882x.2018.1445037 fatcat:rwbjz3c73nhqzkgbvp7z4pidya

Study Of Reverberation Robust Pitch Estimators For The Singing Voice

Hector Parra Rodriguez, Jordi Janer
2013 Zenodo  
Anyway, it demonstrates that de-reverberation methods can be used to improve fundamental frequency estimators' results in reverberant conditions.  ...  Then, we try to improve fundamental frequency estimators' performance using different de-reverberation methods (NML, NMF, ITD) as preprocessors.  ...  Figure 3 . 2 32 Energy Decay Curve (EDC) Figure 3 . 3 33 Direct energy density, Ed, and reverberant energy density, Er, against distance from a 1 watt source in a room of dimensions 3×4×5m with T60 ≈  ... 
doi:10.5281/zenodo.1181811 fatcat:ygiiq4ly6vcjtbwddf7ab4szm4

A Word about Other Interesting Topics (Thermal and Fire Protection of Buildings, Structures, and Rodent Repulsion) [chapter]

2015 Building Acoustics  
Tony Moore, Senior Editor, Taylor & Francis, for inviting me to write this book.  ...  In order to take into account those surfaces, it may be wise to use a computer prediction model [16] [17] [18] .  ...  In the third case, while there usually are some empirical models [21] , it may be wise to use a serious computer model-associated with somebody who knows how to operate it.  ... 
doi:10.1201/b18219-23 fatcat:gr273lqy4fbbnnc724txj5jv64

Performance of optimized sound field control techniques in simulated and real acoustic environments

Philip Coleman, Martin Møller, Martin Olsen, Marek Olik, Philip Jackson, Jan Abildgaard Pedersen
2012 Journal of the Acoustical Society of America  
Acoustical issues are raised from these studies, such as, does the classical parameter of reverberation time still adequate for qualifying the acoustics for a roofless courtyard theatre, or for an amphitheatre  ...  Guidelines for healthcare spaces address day and nighttime Leq and peak levels. However, there are many complex and transient sounds that make up the overall sound levels in healthcare environments.  ...  This paper examines the concept that the perception of reverberation decay can be modelled using dynamic loudness.  ... 
doi:10.1121/1.4709059 fatcat:5yv7djzdifgwvlzymric4u65oa

Dynamic Portal Occlusion for Precomputed Interactive Sound Propagation [article]

Nikunj Raghuvanshi
2021 arXiv   pre-print
The search algorithm is combined with geometric-acoustic approximations to model the additional direct and indirect energy loss from intervening portals depending on their dynamic closure state.  ...  An immersive audio-visual experience in games and virtual reality requires fast calculation of diffraction-based acoustic effects.  ...  At runtime, given any source and listener location, the detailed reverberant energy decay curve can be computed by using graph search to find connecting topological paths and modularly combining the precomputed  ... 
arXiv:2107.11548v2 fatcat:2256mep34zdnpaxiwdlxpi2nuq

The neural bases of normalising for accented speech: A repetition suppression functional magnetic resonance imaging study

Patti Adank, Peter Hagoort
2008 Journal of the Acoustical Society of America  
The current work identifies acoustic characteristics of reduced 'flaps' and presents phonetic identification data for continua that manipulate these characteristics.  ...  Listeners are sensitive to the acoustic characteristics of consonant reduction, but they are also very skilled at evaluating variability along the acoustic dimensions that realize reduction. 4p THU.  ...  Reverberation time ͑T20͒ only describe the later part of the decay curve, and therefore only partly mirror the wanted acoustic reality.  ... 
doi:10.1121/1.2934685 fatcat:qqmjcl5gjzcj7kssv2pi6efwti

Speaker comfort and increase of voice level in lecture rooms

Jonas Brunskog, Anders C. Gade, Gaspar Payà Bellester, Lilian Reig Calbo
2008 Journal of the Acoustical Society of America  
The current work identifies acoustic characteristics of reduced 'flaps' and presents phonetic identification data for continua that manipulate these characteristics.  ...  Listeners are sensitive to the acoustic characteristics of consonant reduction, but they are also very skilled at evaluating variability along the acoustic dimensions that realize reduction.  ...  Reverberation time ͑T20͒ only describe the later part of the decay curve, and therefore only partly mirror the wanted acoustic reality.  ... 
doi:10.1121/1.2934367 fatcat:xr6gp4ldo5bylnxytx2iumrdmi

Fine‐structure processing, frequency selectivity and speech perception in hearing‐impaired listeners

Olaf Strelcyk, Torsten Dau
2008 Journal of the Acoustical Society of America  
The current work identifies acoustic characteristics of reduced 'flaps' and presents phonetic identification data for continua that manipulate these characteristics.  ...  Listeners are sensitive to the acoustic characteristics of consonant reduction, but they are also very skilled at evaluating variability along the acoustic dimensions that realize reduction.  ...  Reverberation time ͑T20͒ only describe the later part of the decay curve, and therefore only partly mirror the wanted acoustic reality.  ... 
doi:10.1121/1.2935148 fatcat:nqyyia5pubamnhqgonegghrudm

Quantitative assessment of spatial sound distortion by the semi-ideal recording point of a hear-through device

Pablo Hoffmann, Flemming Christensen, Dorte Hammersho/i
2013 Journal of the Acoustical Society of America  
Physical properties of the obstacle are arbitrary piece-wise continuous functions of the distance to its center.  ...  Speech enhancement is essential under noisy and reverberant acoustic environments.  ...  As a method for dereverberation, the method using a complementary Wiener filter has been proposed, and for the exponential decay impulse response model, it is shown theoretically that we can suppress reverberation  ... 
doi:10.1121/1.4805375 fatcat:u4bvxh6karet3avpjdhpfwqpf4

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

L. Bjørnø
1983 Journal of the Acoustical Society of America  
Thus we want to detect a curved decay and make a best estimate of its initial decay rate.  ...  A resident graphics module can be used to display the impulse response in various forms and to display the sound energy decay curve computed from the impulse response by backward integration.  ...  To illustrate this theory, numerical modeling results are displayed for both line and convex circulaly curved arrays in range-dependent and range-independent waveguide environments, both in the presence  ... 
doi:10.1121/1.2020879 fatcat:eid6pixobjetzhkfpo6h2okzua

Ultra‐high‐speed imaging of bubbles interacting with cells and tissue

Michel Versluis, Philippe Marmottant, Sascha Hilgenfeldt, Claus‐Dieter Ohl, Chien T. Chin, Annemieke van Wamel, Nico de Jong, Detlef Lohse
2006 Journal of the Acoustical Society of America  
Adaptive beamforming for multipath environments.  ...  This work shows that Bayesian probabilistic inference can be used as a useful tool for sound energy decay analysis in both single-space halls and coupled spaces.  ...  Region, gender, and vowel quality: A word to the wise hearing scientist.  ... 
doi:10.1121/1.4788217 fatcat:5drbrqyk65cqzff2cmj5ne6n5e

Handbook for Industrial Noise Control

1983 Journal of the Acoustical Society of America  
In theory, any material has some effect on the propagation of acoustic energy, but we only review here those commonly used for modifying the acoustic environment to improve the exposure  ...  This is the time taken for a steady-state reverberant sound field to decay to 60 dB below its initial level after removing the noise source input.  ... 
doi:10.1121/1.388936 fatcat:ehef6hynljg5fdt5zoal4kgzye
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