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A New Passive/Active Hybrid Headset for a Helicopter Application
Responsible organisation
1999 (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. 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. This paper evaluates a combination of the techniques and their application to real data.

Place, publisher, year, edition, pages
Karlskrona, Sweden: Högskolan i Karlskrona/Ronneby , 1999.
Keyword [en]
active noise control, speech enhancement, headset
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-10277Local ID: oai:bth.se:forskinfo1286B477E208FCFFC1256C80004E3E6CISBN: 91-630-8156-3 (print)OAI: oai:DiVA.org:bth-10277DiVA: diva2:838365
Conference
RadioVetenskap och Kommunikation 99 (RVK99)
Available from: 2012-09-18 Created: 2002-11-29 Last updated: 2015-06-30Bibliographically approved

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
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  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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