A comparison between results from a physical scale model and a computer image source model for architectural acoustics

Kleiner, Mendel; Orlowski, R.J.; Kirszenstein, J.

doi:10.1016/0003-682x(93)90055-b

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The investigation of the remaining factors, however, is an active research area in computational acoustics. Studies related to the problem [37][38][39] suggest that the early part of reverberation can be well characterized by the specular reflection model. Since early reflections contain the main portion of energy of the reverberated sound, the applied model is considered suitable for predicting the most disturbing peaks in the cross-correlation function that is caused by delayed replicas of sound.…”

Section: Validity Of the Applied Acoustic Modelmentioning

confidence: 99%

Localization of Directional Sound Sources Supported by A Priori Information of the Acoustic Environment

Fodróczi

Radványi

2007

EURASIP J. Adv. Signal Process.

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Speaker localization with microphone arrays has received significant attention in the past decade as a means for automated speaker tracking of individuals in a closed space for videoconferencing systems, directed speech capture systems, and surveillance systems. Traditional techniques are based on estimating the relative time difference of arrivals (TDOA) between different channels, by utilizing crosscorrelation function. As we show in the context of speaker localization, these estimates yield poor results, due to the joint effect of reverberation and the directivity of sound sources. In this paper, we present a novel method that utilizes a priori acoustic information of the monitored region, which makes it possible to localize directional sound sources by taking the effect of reverberation into account. The proposed method shows significant improvement of performance compared with traditional methods in "noise-free" condition. Further work is required to extend its capabilities to noisy environments.

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Section: Validity Of the Applied Acoustic Modelmentioning

confidence: 99%

Localization of Directional Sound Sources Supported by A Priori Information of the Acoustic Environment

Fodróczi

Radványi

2007

EURASIP J. Adv. Signal Process.

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Image model for computer simulation of sound wave behavior in an enclosure

Flanagan

Proceedings of 1995 Workshop on Applications of Signal Processing to Audio and Accoustics

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An image model using the ray tracing method has been developed to calculate the multipath in an enclosure up to a prescribed order of images. Non-uniform wall reflectivities can be included. For the special case of rectangular enclosures, the algorithm efficiently calculates the incident angle for each arriving signal and its associated reflection points.The performancm of gradient microphones in an enclosure can be evaluated. It is noted that the number of images for a given order more nearly resembles an arithmetic series instead of a geometric series. The model is also extended to calculate the impulse response when obstacle planes are inside the enclosure.

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A comparison between results from a physical scale model and a computer image source model for architectural acoustics

Cited by 2 publications

References 11 publications

Localization of Directional Sound Sources Supported by A Priori Information of the Acoustic Environment

Localization of Directional Sound Sources Supported by A Priori Information of the Acoustic Environment

Image model for computer simulation of sound wave behavior in an enclosure

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