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An Active Headset Based on Hybrid Active Noise Control Technology
Responsible organisation
2001 (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 su?er from damage to their hearing due to the high sound levels in the headset produced to overcome the noise caused by increased speaker 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 speaker levels as a result. Helicopter noise consists of tonal components embedded in broadband noise. In order to achieve an e?cient 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 two techniques and their application to real data.

Place, publisher, year, edition, pages
Hague, Netherlands, 2001.
Keyword [en]
active noise control, feedforward controller, feedback control, headset, spectral subtraction, speech enhancement, headset
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-10055Local ID: oai:bth.se:forskinfo4BC85B9ECE795089C1256C790039170BOAI: oai:DiVA.org:bth-10055DiVA: diva2:838070
Conference
Inter-Noise 2001
Available from: 2012-09-18 Created: 2002-11-22 Last updated: 2015-06-30Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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Output format
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