Personal audio loudspeaker array as a complementary TV sound system for the hard of hearing
Personal audio loudspeaker array as a complementary TV sound system for the hard of hearing
A directional array radiator is presented, the aim of which is to enhance the sound of the television in a particular direction and hence provide a volume boost to improve speech intelligibility for the hard of hearing. The sound radiated by the array in other directions is kept low, so as not to increase the reverberant level of sound in the listening room. The array uses 32 loudspeakers, each of which are in phase-shift enclosures to generate hypercardioid directivity, which reduces the radiation from the back of the array. The loudspeakers are arranged in 8 sets of 4 loudspeakers, each set being driven by the same signal and stacked vertically, to improve the directivity in this plane. This creates a 3D beamformer that only needs 8 digital filters to be made superdirective. The performance is assessed by means of simulations and measurements in anechoic and reverberant environments. The results show how the array obtains a high directivity in a reverberant environment.
1824-1831
Simon Galvez, Marcos F.
777da25f-86fc-4a22-8ff1-ac2cbbfe27ae
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, J.
8e452f50-4c7d-4d4e-913a-34015e99b9dc
1 September 2014
Simon Galvez, Marcos F.
777da25f-86fc-4a22-8ff1-ac2cbbfe27ae
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, J.
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Simon Galvez, Marcos F., Elliott, S.J. and Cheer, J.
(2014)
Personal audio loudspeaker array as a complementary TV sound system for the hard of hearing.
IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, E97-A (9), .
(doi:10.1587/transfun.E97.A.1824).
Abstract
A directional array radiator is presented, the aim of which is to enhance the sound of the television in a particular direction and hence provide a volume boost to improve speech intelligibility for the hard of hearing. The sound radiated by the array in other directions is kept low, so as not to increase the reverberant level of sound in the listening room. The array uses 32 loudspeakers, each of which are in phase-shift enclosures to generate hypercardioid directivity, which reduces the radiation from the back of the array. The loudspeakers are arranged in 8 sets of 4 loudspeakers, each set being driven by the same signal and stacked vertically, to improve the directivity in this plane. This creates a 3D beamformer that only needs 8 digital filters to be made superdirective. The performance is assessed by means of simulations and measurements in anechoic and reverberant environments. The results show how the array obtains a high directivity in a reverberant environment.
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Published date: 1 September 2014
Organisations:
Signal Processing & Control Grp
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Local EPrints ID: 368923
URI: http://eprints.soton.ac.uk/id/eprint/368923
ISSN: 0916-8508
PURE UUID: a1ee31f3-c8f1-4fd0-911f-1e54f93bc21e
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Date deposited: 18 Sep 2014 08:48
Last modified: 15 Mar 2024 03:37
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