Ring sensors for propagating wave detection in ducts

Marko Antila, Jari Kataja, Veli-Jukka Ollikainen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Acoustic sensors are an important part in an active noise control system in ducts. Flush mounted or wire suspended pressure microphones are commonly used sensors to both detect the primary sound field and to measure the remaining error signal. Such sensors detect the sound pressure at a single point. They operate adequately if the duct properties are close to the ideal ones and the propagating wave is a plane wave. If the duct differs from the ideal one or the operating frequency range is above the first diametrical mode, large area sensors or sensor arrays are beneficial for detecting the propagating wave. We modeled and simulated the propagation of sound in a semiinfinite duct and the influence of the sound on the sensors. We used the regular laboratory pressure microphones as references and we also constructed circular sensors. The operation of the sensors was measured and the results analyzed.
Original languageEnglish
Title of host publication INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01
Pages1608-1611
Number of pages4
Publication statusPublished - 2001
MoE publication typeB3 Non-refereed article in conference proceedings
EventInter-Noise 2001 - Haag, Netherlands
Duration: 27 Aug 200130 Aug 2001

Conference

ConferenceInter-Noise 2001
CountryNetherlands
CityHaag
Period27/08/0130/08/01

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ducts
rings
sensors
microphones
acoustics
error signals
sound fields
sound pressure
plane waves
frequency ranges
wire
propagation

Cite this

Antila, M., Kataja, J., & Ollikainen, V-J. (2001). Ring sensors for propagating wave detection in ducts. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01 (pp. 1608-1611)
Antila, Marko ; Kataja, Jari ; Ollikainen, Veli-Jukka. / Ring sensors for propagating wave detection in ducts. INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01. 2001. pp. 1608-1611
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Antila, M, Kataja, J & Ollikainen, V-J 2001, Ring sensors for propagating wave detection in ducts. in INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01. pp. 1608-1611, Inter-Noise 2001, Haag, Netherlands, 27/08/01.

Ring sensors for propagating wave detection in ducts. / Antila, Marko; Kataja, Jari; Ollikainen, Veli-Jukka.

INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01. 2001. p. 1608-1611.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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N2 - Acoustic sensors are an important part in an active noise control system in ducts. Flush mounted or wire suspended pressure microphones are commonly used sensors to both detect the primary sound field and to measure the remaining error signal. Such sensors detect the sound pressure at a single point. They operate adequately if the duct properties are close to the ideal ones and the propagating wave is a plane wave. If the duct differs from the ideal one or the operating frequency range is above the first diametrical mode, large area sensors or sensor arrays are beneficial for detecting the propagating wave. We modeled and simulated the propagation of sound in a semiinfinite duct and the influence of the sound on the sensors. We used the regular laboratory pressure microphones as references and we also constructed circular sensors. The operation of the sensors was measured and the results analyzed.

AB - Acoustic sensors are an important part in an active noise control system in ducts. Flush mounted or wire suspended pressure microphones are commonly used sensors to both detect the primary sound field and to measure the remaining error signal. Such sensors detect the sound pressure at a single point. They operate adequately if the duct properties are close to the ideal ones and the propagating wave is a plane wave. If the duct differs from the ideal one or the operating frequency range is above the first diametrical mode, large area sensors or sensor arrays are beneficial for detecting the propagating wave. We modeled and simulated the propagation of sound in a semiinfinite duct and the influence of the sound on the sensors. We used the regular laboratory pressure microphones as references and we also constructed circular sensors. The operation of the sensors was measured and the results analyzed.

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Antila M, Kataja J, Ollikainen V-J. Ring sensors for propagating wave detection in ducts. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise01. 2001. p. 1608-1611