Experimental investigation into the properties of an acoustic laboratory setup to replicate the sound radiation model of a simply supported plate in a rigid baffle
Publication date
2025-03-19
Document type
Konferenzbeitrag
Author
Organisational unit
Conference
51st Annual Meeting on Acoustics (DAS|DAGA 2025) ; Copenhagen, Denmark ; March 17-20, 2025
Project
Akustische Nahfeldholografie als Sensorkonzept für aktive Lärmminderungsmaßnahmen
Publisher
Deutsche Gesellschaft für Akustik e.V. (DEGA)
Book title
Proceedings of DAS|DAGA 2025
First page
1005
Last page
1008
Part of the university bibliography
✅
Language
English
DDC Class
534 Schall und verwandte Schwingungen
Keyword
Vibration
Acoustics
Microphones
Rayleigh integral
Sound intensity
Sound power
Loudspeaker
Abstract
To test methods for active noise and vibration compensation, the mathematical model of a rectangular simply supported plate in a rigid baffled is reproduced experimentally in a laboratory. In order to verify the accuracy of this replication, the assumed boundary conditions are examined by using harmonic signals for excitation. The investigated frequency range comprises the first 20 natural frequencies of the plate and ranges in the first quartile below the coincidence frequency. The acoustic boundary conditions are tested by comparing the calculated sound field of the circular piston radiator in a rigid baffle with the measured sound field generated by a loudspeaker of the same size mounted in a large wooden wall. The structural boundary conditions are verified by comparing the normal vibration velocity calculated using the model of the simply supported plate and the velocity field measured on a plate using a laser vibrometer.
Version
Published version
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Metadata only access