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Convention Paper

Subwoofers in Rooms: Stereophonic Reproduction

Authors: Backman, Juha

AES Convention 138 · Paper 9319 · May 2015

Abstract

A study based on computational model of interaural level and time differences at the lowest audio frequencies, often reproduced through subwoofers, is presented. This work studies whether interaural differences can exist, and if they do, what kind of relationship there is between the loudspeaker direction and the interaural differences when monophonic and stereophonic subwoofer arrangements are considered. The calculations are made for both simple amplitude panned signals and for simulated microphone signals. The results indicate that strong narrow-band differences can exist, especially near room eigenfrequencies when the listener is close to nodes of the room modes and that the modes of the recording room can have an effect on the sound field of the listening room. In addition to the computational results an analysis of interchannel level differences in recordings is presented, confirming the computational model.

Details

Published in
AES Convention 138
AES Convention
138
Paper number
9319
Publication date
May 6, 2015
Session subject
Transducers
Affiliation
Microsoft, Espoo, Finland (See document for exact affiliation information.)
Type
Convention Paper