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In listening rooms, low-frequency modal resonances lead to uneven distributions in space and frequency of the acoustic energy, as well as an alteration of the temporal behavior of the original music content. While usual absorption techniques have severe limitations for reducing the negative impact of room modes, the authors have previously proposed the use of electroacoustic absorbers for room modal equalization. This device consists of a current-driven, closed-box loudspeaker associated to a hybrid sensor-/shunt-based impedance control. In this communication we assess the performance of these electroacoustic absorbers in actual listening rooms, by measuring frequency responses at different locations, as well as their modal decay times. The electroacoustic absorbers perform as expected and the room modal equalization is clearly improved in the low-frequency range.
Author (s): Rivet, Etienne; Karkar, Sami; Lissek, Hervé; Thorsen, Torje Nikolai; Adam, Véronique
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Goldmund International, Monaco, Monaco
(See document for exact affiliation information.)
AES Convention: 140
Paper Number:9505
Publication Date:
2016-05-06
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Session subject:
Room Acoustics
Permalink: https://aes2.org/publications/elibrary-page/?id=18204
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Rivet, Etienne; Karkar, Sami; Lissek, Hervé; Thorsen, Torje Nikolai; Adam, Véronique; 2016; Experimental Assessment of Low-Frequency Electroacoustic Absorbers for Modal Equalization in Actual Listening Rooms [PDF]; Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Goldmund International, Monaco, Monaco; Paper 9505; Available from: https://aes2.org/publications/elibrary-page/?id=18204
Rivet, Etienne; Karkar, Sami; Lissek, Hervé; Thorsen, Torje Nikolai; Adam, Véronique; Experimental Assessment of Low-Frequency Electroacoustic Absorbers for Modal Equalization in Actual Listening Rooms [PDF]; Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Goldmund International, Monaco, Monaco; Paper 9505; 2016 Available: https://aes2.org/publications/elibrary-page/?id=18204
@article{rivet2016experimental,
author={rivet etienne and karkar sami and lissek hervé and thorsen torje nikolai and adam véronique},
journal={journal of the audio engineering society},
title={experimental assessment of low-frequency electroacoustic absorbers for modal equalization in actual listening rooms},
year={2016},
number={9505},
month={may},}
TY – paper
TI – Experimental Assessment of Low-Frequency Electroacoustic Absorbers for Modal Equalization in Actual Listening Rooms
AU – Rivet, Etienne
AU – Karkar, Sami
AU – Lissek, Hervé
AU – Thorsen, Torje Nikolai
AU – Adam, Véronique
PY – 2016
JO – Journal of the Audio Engineering Society
VL – 9505
Y1 – May 2016