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An active headrest for personal audio

An active headrest for personal audio
An active headrest for personal audio
There is an increasing need for personal audio systems, which generate sounds that are clearly audible to one listener but are not audible to other listeners nearby. Of particular interest in this paper are listeners sitting in adjacent seats in aircraft or land vehicles. Although personal audio could then be achieved with headsets, it would be safer and more comfortable if loudspeakers in the seat headrests could be actively controlled to generate an acceptable level of acoustic isolation. In this paper a number of approaches to this problem are investigated, but the most successful involves a pair of loudspeakers on one side of the headrest, driven together to reproduce an audio signal for a listener in that seat and also to attenuate the pressures in the adjacent seat. The performance of this technique is investigated using simple analytic models and also with a practical implementation, tested in an anechoic chamber and a small room. It is found that significant attenuations, of between 5 and 25 dB, can be achieved in the crosstalk between the seats for frequencies up to about 2 kHz.
0001-4966
2702-2709
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Jones, Matthew
7aaa98e2-a8e3-4eaf-9034-669c48cb893f
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Jones, Matthew
7aaa98e2-a8e3-4eaf-9034-669c48cb893f

Elliott, Stephen and Jones, Matthew (2006) An active headrest for personal audio. Journal of the Acoustical Society of America, 119 (5), 2702-2709. (doi:10.1121/1.2188814).

Record type: Article

Abstract

There is an increasing need for personal audio systems, which generate sounds that are clearly audible to one listener but are not audible to other listeners nearby. Of particular interest in this paper are listeners sitting in adjacent seats in aircraft or land vehicles. Although personal audio could then be achieved with headsets, it would be safer and more comfortable if loudspeakers in the seat headrests could be actively controlled to generate an acceptable level of acoustic isolation. In this paper a number of approaches to this problem are investigated, but the most successful involves a pair of loudspeakers on one side of the headrest, driven together to reproduce an audio signal for a listener in that seat and also to attenuate the pressures in the adjacent seat. The performance of this technique is investigated using simple analytic models and also with a practical implementation, tested in an anechoic chamber and a small room. It is found that significant attenuations, of between 5 and 25 dB, can be achieved in the crosstalk between the seats for frequencies up to about 2 kHz.

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Published date: 2006

Identifiers

Local EPrints ID: 28549
URI: https://eprints.soton.ac.uk/id/eprint/28549
ISSN: 0001-4966
PURE UUID: b5de2e45-6021-46dd-b7a4-6cc44811011d

Catalogue record

Date deposited: 28 Apr 2006
Last modified: 05 Dec 2018 17:34

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