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Engineering Brief

The BACH Experience: Bring a Concert Home

Authors: Basu, Sattwik; Kareer, Saarish

AES Convention 143 · Paper 393 · October 2017

Abstract

Inverse filtering of rooms to improve their frequency response or reverberation time is a well-researched topic in acoustical signal processing. With the aim of giving music lovers the experience of a concert hall in their own homes, we describe a system that employs signal processing techniques, including inverse filtering, to accurately reproduce concert hall acoustics in a home listening space. First, binaural impulse responses were measured at a few chosen seating positions in the concert hall. Next, the listening location along with its loudspeaker configuration is acoustically characterized and inverse filtered using MINT and Cross-talk Cancellation algorithms to produce a flat-frequency response. We observed that speech and music, after our inverse filtering method showed near-anechoic qualities which allowed us to subsequently impress the acoustical response of a wide range of concert halls upon the original audio. A demonstration will be provided using 4 loudspeakers for a quadraphonic sound reproduction at the listening area. In continuing work, to produce a sufficiently wide listening area, we are combining head tracking with adaptive inverse filtering to adjust to the listeners’ movements.

Details

Published in
AES Convention 143
AES Convention
143
Paper number
393
Publication date
October 6, 2017
Session subject
Posters—Part 3
Affiliation
University of Rochester, Rochester, NY, USA (See document for exact affiliation information.)
Type
Engineering Brief