Sound amplification and flow noise reduction with acoustic velocity horns

Dimitri M. Donskoy, Scott E. Hassan

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

Small wavelength size acoustic velocity horns (AVH) were recently introduced, [1], as particle velocity amplifiers having flat amplitude and phase frequency responses below their first resonance. AVH predicted amplification characteristics have been experimentally verified, [2, 3], demonstrating interesting opportunities for vector sensors (VS) sensitivity enhancement. Present work provides enhanced analysis of amplification and characteristics of complex shape horns. Additionally, we address another AVH feature: turbulence flow noise reduction due to turbulence field spatial averaging across horn's mouth area. Numerical analysis demonstrated up to 25 dB convective turbulent pressure and velocity reduction at the horn throat.

Original languageEnglish
Article number4pUW8
JournalProceedings of Meetings on Acoustics
Volume21
Issue number1
DOIs
StatePublished - 1 Nov 2014
Event167th Meeting of the Acoustical Society of America - Providence, United States
Duration: 5 May 20149 May 2014

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