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The intensity responses in three orthogonal directions, which are calculated from measured impulse responses, include information of dominant reflections in 4-pi space. This information is important for restoration of a sound field, e.g., a spatial reverberator. A method of extracting significant reflections from instantaneous intensities or their envelopes is, therefore, the key application element. To improve the accuracy of detecting reflections, the authors have introduced a new strategy, named “speed detection,” which calculates the moving speed of instantaneous intensities at every sampled time. If the speed is lower than an assumed threshold, these intensities indicate reflections. On the contrary, faster speeds indicate the residual transient components of intensities. This “speed detection” is verified with the measured data of several experiments.
Author (s): Nakahara, Masataka; Omoto, Akira; Nagatomo, Yasuhiko
Affiliation:
ONFUTURE Ltd./SONA Corporation, Shinagawa, Tokyo, Japan; Evixar Inc., Tokyo, Japan; Kyushu University / ONFUTURE Ltd., Fukuoka, Japan
(See document for exact affiliation information.)
AES Convention: 142
Paper Number:316
Publication Date:
2017-05-06
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Session subject:
Posters: Spatial Audio, Room, Recording, and Listening
Permalink: https://aes2.org/publications/elibrary-page/?id=18692
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Nakahara, Masataka; Omoto, Akira; Nagatomo, Yasuhiko; 2017; Accurate Extraction of Dominant Reflections from Measured Sound Intensity Responses in a Room [PDF]; ONFUTURE Ltd./SONA Corporation, Shinagawa, Tokyo, Japan; Evixar Inc., Tokyo, Japan; Kyushu University / ONFUTURE Ltd., Fukuoka, Japan; Paper 316; Available from: https://aes2.org/publications/elibrary-page/?id=18692
Nakahara, Masataka; Omoto, Akira; Nagatomo, Yasuhiko; Accurate Extraction of Dominant Reflections from Measured Sound Intensity Responses in a Room [PDF]; ONFUTURE Ltd./SONA Corporation, Shinagawa, Tokyo, Japan; Evixar Inc., Tokyo, Japan; Kyushu University / ONFUTURE Ltd., Fukuoka, Japan; Paper 316; 2017 Available: https://aes2.org/publications/elibrary-page/?id=18692
@article{nakahara2017accurate,
author={nakahara masataka and omoto akira and nagatomo yasuhiko},
journal={journal of the audio engineering society},
title={accurate extraction of dominant reflections from measured sound intensity responses in a room},
year={2017},
number={316},
month={may},}