Combined Method of Near Field Acoustic Holography and Focused Beamforming for Noise Source Identification in Enclosed Space
نویسندگان
چکیده
منابع مشابه
A sparse equivalent source method for near-field acoustic holography.
This study examines a near-field acoustic holography method consisting of a sparse formulation of the equivalent source method, based on the compressive sensing (CS) framework. The method, denoted Compressive-Equivalent Source Method (C-ESM), encourages spatially sparse solutions (based on the superposition of few waves) that are accurate when the acoustic sources are spatially localized. The i...
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A phase-sensitive setup for near-field acoustic holography was established in order to determine the characteristic resonance modes of a vibrating membrane. The experiment was carried out using a frame drum as the vibrating system of interest. By exciting the membrane at certain fundamental frequencies and recording the complex signals from the pressure and particle velocity fields across the d...
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As rockets and jets on military aircraft become more powerful, the noise they produce can lead to structural fatigue, hearing damage, and community disturbances. Noise-reduction technologies and sound radiation prediction require accurate characterization of the noise sources within rocket plumes and jets. Near-field acoustical holography techniques were used to visualize the sound field in the...
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ژورنال
عنوان ژورنال: The International Journal of Acoustics and Vibration
سال: 2017
ISSN: 1027-5851,2415-1408
DOI: 10.20855/ijav.2017.22.3484