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A New Active Headset for a Helicopter Application
Responsible organisation
1998 (English)Conference paper, (Refereed) Published
Abstract [en]

In helicopters, the low frequency noise generated by the rotors and engines often masks and jeopardizes safe communication. In addition, pilots are likely to suffer from damage to their hearing due to the high sound levels in the headset produced in compensating for the noise caused by increased loudspeaker levels. A feasible approach is to reduce the low frequency noise by using active techniques combined with a method for reducing the noise in the intercom microphone signal, with lower loudspeaker levels as a result. Helicopter noise consists of tonal components embedded in broadband noise. In order to achieve an efficient attenuation of the primary noise inside the headset, a combination of a digital feedforward controller and an analog feedback controller is employed. Spectral Subtraction is used to suppress the background noise in speech signals.

Place, publisher, year, edition, pages
Riksgränsen, Sverige, 1998.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-10285Local ID: oai:bth.se:forskinfo10FF2D1829595E4AC1256C71002474BBOAI: oai:DiVA.org:bth-10285DiVA: diva2:838374
Conference
SVIB AU-2 Konferens
Available from: 2012-09-18 Created: 2002-11-14 Last updated: 2015-06-30Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
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  • en-US
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  • Other locale
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Output format
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