Horns as particle velocity amplifiers

Dimitri M. Donskoy, Benjamin A. Cray

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Preliminary measurements and numerical predictions reveal that simple, and relatively small, horns generate remarkable amplification of acoustic particle velocity. For example, below 2 kHz, a 2.5 cm conical horn has a uniform velocity amplification ratio (throat-to-mouth) factor of approximately 3, or, in terms of a decibel level, 9.5 dB. It is shown that the velocity amplification factor depends on the horn's mouth-to-throat ratio as well as, though to a lesser degree, the horn's flare rate. A double horn configuration provides limited additional gain, approximately an increase of up to 25.

Original languageEnglish
Pages (from-to)EL311-EL315
JournalJournal of the Acoustical Society of America
Volume130
Issue number5
DOIs
StatePublished - Nov 2011

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