Generation of private sound with a circular loudspeaker array and the Weighted Pressure Matching method
Generation of private sound with a circular loudspeaker array and the Weighted Pressure Matching method
In this work, we propose a system for private sound which is based on the Weighted Pressure Matching method (WPMM). The aim is to design the input signals to an array of loudspeakers which allow for the synthesis of a target field defined with large amplitude variations between the so-called dark points and the listener’s position. The system enables listeners to control the trade-off between directivity performance and the accuracy of reproduction of the target field at the listening position when the input energy to the array is limited. This is achieved by calculating the WPMM weight in the dark zone based on a performance constraint on the characteristics of the sound field in the listening zone. The system is validated for a number of pre-defined use-case scenarios. The results of the experiments in an anechoic environment with a circular array prototype show that listeners can control the performance trade-off in a wide frequency range. In the second part of the paper, algorithms are presented for the fast update of the input signals when the user selects a new value of the performance constraint.
loudspeakers, microphones, prototypes, transfer functions, speech, speech processing, iterative methods
1579-1591
Olivieri, Ferdinando
02d11b82-4e34-441f-9e04-60fb117d6617
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Fontana, Simone
d37cb129-75d5-45dc-8a24-1b39741af935
Menzies, Dylan
0cc76abc-8a10-4b7f-96e5-56eceb0b2c5c
Nelson, Philip
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
August 2017
Olivieri, Ferdinando
02d11b82-4e34-441f-9e04-60fb117d6617
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Fontana, Simone
d37cb129-75d5-45dc-8a24-1b39741af935
Menzies, Dylan
0cc76abc-8a10-4b7f-96e5-56eceb0b2c5c
Nelson, Philip
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Olivieri, Ferdinando, Fazi, Filippo, Fontana, Simone, Menzies, Dylan and Nelson, Philip
(2017)
Generation of private sound with a circular loudspeaker array and the Weighted Pressure Matching method.
IEEE/ACM Transactions on Audio, Speech, and Language Processing, 25 (8), .
(doi:10.1109/TASLP.2017.2700945).
Abstract
In this work, we propose a system for private sound which is based on the Weighted Pressure Matching method (WPMM). The aim is to design the input signals to an array of loudspeakers which allow for the synthesis of a target field defined with large amplitude variations between the so-called dark points and the listener’s position. The system enables listeners to control the trade-off between directivity performance and the accuracy of reproduction of the target field at the listening position when the input energy to the array is limited. This is achieved by calculating the WPMM weight in the dark zone based on a performance constraint on the characteristics of the sound field in the listening zone. The system is validated for a number of pre-defined use-case scenarios. The results of the experiments in an anechoic environment with a circular array prototype show that listeners can control the performance trade-off in a wide frequency range. In the second part of the paper, algorithms are presented for the fast update of the input signals when the user selects a new value of the performance constraint.
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Accepted/In Press date: 21 April 2017
e-pub ahead of print date: 3 May 2017
Published date: August 2017
Keywords:
loudspeakers, microphones, prototypes, transfer functions, speech, speech processing, iterative methods
Organisations:
Acoustics Group
Identifiers
Local EPrints ID: 411228
URI: http://eprints.soton.ac.uk/id/eprint/411228
PURE UUID: fb0017d4-4f41-4f39-b19a-b777fff7e172
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Date deposited: 15 Jun 2017 16:32
Last modified: 16 Mar 2024 03:59
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Author:
Ferdinando Olivieri
Author:
Simone Fontana
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