Modulation of high frequency noise by engine tones of small boats

Alexander Pollara, Alexander Sutin, Hady Salloum

Research output: Contribution to journalArticle

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Abstract

The effect of modulation of high frequency ship noise by propeller rotation frequencies is well known. This modulation is observed with the Detection of Envelope Modulation on Noise (DEMON) algorithm. Analysis of the DEMON spectrum allows the revolutions per minute and number of blades of the propeller to be determined. This work shows that the high frequency noise of a small boat can also be modulated by engine frequencies. Prior studies have not reported high frequency noise amplitude modulated at engine frequencies. This modulation is likely produced by bubbles from the engine exhaust system.

LanguageEnglish (US)
PagesEL30-EL34
JournalJournal of the Acoustical Society of America
Volume142
Issue number1
DOIs
StatePublished - Jul 1 2017

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boats
engines
modulation
propellers
envelopes
exhaust systems
noise spectra
ships
blades
bubbles
Boats
Modulation

Cite this

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Modulation of high frequency noise by engine tones of small boats. / Pollara, Alexander; Sutin, Alexander; Salloum, Hady.

In: Journal of the Acoustical Society of America, Vol. 142, No. 1, 01.07.2017, p. EL30-EL34.

Research output: Contribution to journalArticle

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