The effect of finite sized baffles on mobile device personal audio
The effect of finite sized baffles on mobile device personal audio
To reduce the annoyance from the use of loudspeakers on mobile devices, previous work has investigated the use of acoustic contrast control to optimise the performance of small arrays of loudspeakers. These investigations have assumed that the baffle dimensions are negligible so that the loudspeakers are omnidirectional, which is reasonable at low frequencies; however, in practice the effect of a finite-sized baffle on the optimised performance is important at higher frequencies. This paper reports the results of using a finite-element model of a two-source array, positioned on a mobile phone sized baffle, to investigate the influence of the baffle on the predicted array performance. The baffle is shown to reduce the performance of the array at frequencies greater than around 1 kHz, but then the directivity of the individual drivers enhances performance at these higher frequencies.
9781617829253
Audio Engineering Society
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen J.
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Kim, Youngtae
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Choi, Jung-Woo
ca4b1f63-87f3-4932-a445-1b20378b3599
13 May 2011
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Kim, Youngtae
e3d9699e-0938-47b3-8346-4942fed62de2
Choi, Jung-Woo
ca4b1f63-87f3-4932-a445-1b20378b3599
Cheer, Jordan, Elliott, Stephen J., Kim, Youngtae and Choi, Jung-Woo
(2011)
The effect of finite sized baffles on mobile device personal audio.
In Proceedings of the Audio Engineering Society.
Audio Engineering Society..
Record type:
Conference or Workshop Item
(Paper)
Abstract
To reduce the annoyance from the use of loudspeakers on mobile devices, previous work has investigated the use of acoustic contrast control to optimise the performance of small arrays of loudspeakers. These investigations have assumed that the baffle dimensions are negligible so that the loudspeakers are omnidirectional, which is reasonable at low frequencies; however, in practice the effect of a finite-sized baffle on the optimised performance is important at higher frequencies. This paper reports the results of using a finite-element model of a two-source array, positioned on a mobile phone sized baffle, to investigate the influence of the baffle on the predicted array performance. The baffle is shown to reduce the performance of the array at frequencies greater than around 1 kHz, but then the directivity of the individual drivers enhances performance at these higher frequencies.
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Published date: 13 May 2011
Venue - Dates:
130th Audio Engineering Society Convention, 2011-05-13 - 2011-05-15
Organisations:
Signal Processing & Control Grp
Identifiers
Local EPrints ID: 352924
URI: http://eprints.soton.ac.uk/id/eprint/352924
ISBN: 9781617829253
PURE UUID: aad09db9-b1c0-4a33-9ce4-27e8c4378640
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Date deposited: 28 May 2013 09:45
Last modified: 15 Mar 2024 03:37
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Author:
Youngtae Kim
Author:
Jung-Woo Choi
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