A pneumatic loudspeaker for intensive sounds

A pneumatic loudspeaker for intensive sounds is presented. It operates by modulation of air from over- and underpressure reservoirs, as opposed to siren-like loudspeakers that use compressed air only. The symmetric construction makes the behavior more linear both with respect to aperture amplitudes...

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Bibliographic Details
Main Authors: Holmberg, U., Svensson, W.
Format: Conference Proceeding
Language:English
Subjects:
Acoustics
Active noise
Active noise cancellation
Active noise control
Broadband communication
Compressed air
Construction industry
Frequency band width
Frequency bands
Hammerstein model
identification of nonlinear systems
Large volumes
loudspeaker
Loudspeakers
Modulation
Noise
Pistons
Pneumatics
Polynomials
Reservoirs
Secondary sources
Signaling
Solid modeling
Underpressure
Wide frequency bands
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Summary:A pneumatic loudspeaker for intensive sounds is presented. It operates by modulation of air from over- and underpressure reservoirs, as opposed to siren-like loudspeakers that use compressed air only. The symmetric construction makes the behavior more linear both with respect to aperture amplitudes and frequency bandwidth. Therefore, it may be used as secondary source in industrial active noise control problems where generation of large volume velocities are necessary. It is also shown that a Hammerstein model can model the loudspeaker over a wide frequency band.
DOI:10.23919/ECC.2001.7076260