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The design of a low-cost directional warning sound system for electric vehicles

The design of a low-cost directional warning sound system for electric vehicles
The design of a low-cost directional warning sound system for electric vehicles
Electric vehicle warning sounds are now required by law in many countries due to safety concerns, but this additional noise source may increase unwanted noise pollution. Therefore, the design of an electric vehicle warning sound system that can produce a directional sound field has been investigated. This paper introduces two design suggestions for a system with comparable performance to the conventional loudspeaker array, but at a significantly lower manufacturing and maintenance cost, suitable for wider commercial adoption. The first method utilises a single loudspeaker attached to a length of perforated piping which acts as a directional acoustic radiator, which is analogous to the shotgun microphone. The second approach replaces the standard loudspeaker array with inertial actuators mounted to a vehicle body panel and these are driven to radiate a controlled directional sound field. A simulation based comparison between the suggested configurations and a conventional loudspeaker array of equivalent physical dimensions is presented.
Kournoutos, Nikolaos
e50839ec-f9f9-43d6-9240-e8c7b551a448
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Kournoutos, Nikolaos
e50839ec-f9f9-43d6-9240-e8c7b551a448
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567

Kournoutos, Nikolaos, Cheer, Jordan and Elliott, Stephen (2018) The design of a low-cost directional warning sound system for electric vehicles. International Conference on Noise & Vibration Engineering (ISMA) 2018, Leuven, Belgium. 17 - 19 Sep 2018. 11 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Electric vehicle warning sounds are now required by law in many countries due to safety concerns, but this additional noise source may increase unwanted noise pollution. Therefore, the design of an electric vehicle warning sound system that can produce a directional sound field has been investigated. This paper introduces two design suggestions for a system with comparable performance to the conventional loudspeaker array, but at a significantly lower manufacturing and maintenance cost, suitable for wider commercial adoption. The first method utilises a single loudspeaker attached to a length of perforated piping which acts as a directional acoustic radiator, which is analogous to the shotgun microphone. The second approach replaces the standard loudspeaker array with inertial actuators mounted to a vehicle body panel and these are driven to radiate a controlled directional sound field. A simulation based comparison between the suggested configurations and a conventional loudspeaker array of equivalent physical dimensions is presented.

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More information

Published date: 17 September 2018
Venue - Dates: International Conference on Noise & Vibration Engineering (ISMA) 2018, Leuven, Belgium, 2018-09-17 - 2018-09-19

Identifiers

Local EPrints ID: 424189
URI: https://eprints.soton.ac.uk/id/eprint/424189
PURE UUID: 533a6c4f-815d-4400-be84-fa0f8e147f80
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 05 Oct 2018 11:34
Last modified: 20 Jul 2019 00:45

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