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The paper presents an alternative approach for estimating reverberation time from measurements in real rooms when the requirements of the standard DIN EN ISO 3382-1/2 for the characteristics of the sound source, receiver, and measurement positions cannot be met. The main goal is to minimize the variance of the calculated reverberation times when using a directional source and receiver, or source-receiver relative positions with very small distances. For this purpose, the energy decay curve for individual octave bands is sampled in time. The estimation starts 2 ms after the direct sound. This is followed by several estimates of the RT over a 20 dB drop, starting 1 dB later with each iteration. The best fit mean of these values gives the estimated reverberation time. A comparison with the standard reverberation time estimation shows a variance reduction of 10% to 30% for binaural room impulse responses (BRIRs). The proposed method finds its application in situations where measurements can only be made at a few positions in the room and/or only in a few areas of the room. Furthermore, the method should be better suitable for measurements with receivers located near or at the head of a person.
Author (s): Treybig, Lukas; Werner, Stephan; Klein, Florian; Gari, Amengual Garí, Sebastià V
Affiliation:
Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Reality Labs Research, Meta, Redmond, USA
(See document for exact affiliation information.)
AES Convention: 154
Paper Number:10640
Publication Date:
2023-05-06
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Session subject:
Room Acoustics
Permalink: https://aes2.org/publications/elibrary-page/?id=22047
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Treybig, Lukas; Werner, Stephan; Klein, Florian; Gari, Amengual Garí, Sebastià V; 2023; Robust reverberation time estimation for audio augmented reality applications [PDF]; Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Reality Labs Research, Meta, Redmond, USA; Paper 10640; Available from: https://aes2.org/publications/elibrary-page/?id=22047
Treybig, Lukas; Werner, Stephan; Klein, Florian; Gari, Amengual Garí, Sebastià V; Robust reverberation time estimation for audio augmented reality applications [PDF]; Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Technische Universität Ilmenau, Ilmenau, Germany; Reality Labs Research, Meta, Redmond, USA; Paper 10640; 2023 Available: https://aes2.org/publications/elibrary-page/?id=22047
@article{treybig2023robust,
author={treybig lukas and werner stephan and klein florian and gari amengual garí sebastià v},
journal={journal of the audio engineering society},
title={robust reverberation time estimation for audio augmented reality applications},
year={2023},
number={10640},
month={may},}