A low-cost loudspeaker array for personal audio with enhanced vertical directivity
A low-cost loudspeaker array for personal audio with enhanced vertical directivity
Personal audio refers to the production of spatially distinct listening zones within a space that is shared by multiple people. This technology can enable each listener to hear their own desired material without affecting others, facilitate private communication in public spaces, or provide independent volume controls when people of different ages watch TV together. This is accomplished using loudspeaker array processing, and the performance of a given system is subject to practical limitations associated with the array, the zonal geometry and the reproduction environment. The directivity of typical line array designs is only controllable in the horizontal plane, with approximately monopole directivity in the vertical direction. This can reduce real-world performance through excitation of the reverberant sound field. To overcome this limitation a design is presented for an eight-channel line array of loudspeakers, with each loudspeaker designed to be directional in the vertical plane. The design uses inexpensive components and the USB audio protocol to lower the barrier to entry into personal audio research and development. In order to form sound zones, input signals must be processed using transfer responses between the array elements and the desired sound zones, and in keeping with the philosophy of cost reduction, two different methods for analytically approximating these responses are compared against anechoic measurements which are expensive to acquire.
Personal Audio,, Array Processing,, Directivity,
Wallace, Daniel
ef3e070e-d641-48ac-8e5b-fe083131ee86
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
31 August 2020
Wallace, Daniel
ef3e070e-d641-48ac-8e5b-fe083131ee86
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Wallace, Daniel and Cheer, Jordan
(2020)
A low-cost loudspeaker array for personal audio with enhanced vertical directivity.
Inter-Noise 2020, Online.
23 - 26 Aug 2020.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Personal audio refers to the production of spatially distinct listening zones within a space that is shared by multiple people. This technology can enable each listener to hear their own desired material without affecting others, facilitate private communication in public spaces, or provide independent volume controls when people of different ages watch TV together. This is accomplished using loudspeaker array processing, and the performance of a given system is subject to practical limitations associated with the array, the zonal geometry and the reproduction environment. The directivity of typical line array designs is only controllable in the horizontal plane, with approximately monopole directivity in the vertical direction. This can reduce real-world performance through excitation of the reverberant sound field. To overcome this limitation a design is presented for an eight-channel line array of loudspeakers, with each loudspeaker designed to be directional in the vertical plane. The design uses inexpensive components and the USB audio protocol to lower the barrier to entry into personal audio research and development. In order to form sound zones, input signals must be processed using transfer responses between the array elements and the desired sound zones, and in keeping with the philosophy of cost reduction, two different methods for analytically approximating these responses are compared against anechoic measurements which are expensive to acquire.
Text
Inter-Noise Array Paper
- Accepted Manuscript
Text
A LOW COST LOUDSPEAKER ARRAY
- Accepted Manuscript
Restricted to Repository staff only
Request a copy
More information
Accepted/In Press date: 23 March 2020
Published date: 31 August 2020
Venue - Dates:
Inter-Noise 2020, Online, 2020-08-23 - 2020-08-26
Keywords:
Personal Audio,, Array Processing,, Directivity,
Identifiers
Local EPrints ID: 439055
URI: http://eprints.soton.ac.uk/id/eprint/439055
PURE UUID: 571da81d-41a4-4170-a5cc-802db2ec7f3c
Catalogue record
Date deposited: 02 Apr 2020 16:31
Last modified: 09 Aug 2024 01:45
Export record
Contributors
Author:
Daniel Wallace
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics