The sound emission pattern of the echolocating bat, Eptesicus Fuscus

David J. artley, Roderick Suthers

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

The emission pattern of Eptesicus fuscus was found to be consistent with those of the other frequency-modulating (FM) bats studied in similar detail in that there is a mainlobe aimed forward of the animal together with a prominent — 6-dB ventral lobe. This ventral lobe cannot be explained as the first sidelobe of a piston source mounted in an infinite baffle and must be formed by some other acoustic means. Nevertheless, a piston source with a radius comparable to that of the open mouth can nicely explain the changes in the width of the mainlobe with frequency, so that the open mouth alone can explain the observed directionality. At wavelengths greater than the mouth dimensions, however, some additional sound “focusing” may occur, presumably due to diffraction by the head.

Original languageEnglish (US)
Pages (from-to)1348-1351
Number of pages4
JournalJournal of the Acoustical Society of America
Volume85
Issue number3
DOIs
StatePublished - 1989

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bats
mouth
pistons
lobes
acoustics
baffles
sidelobes
animals
radii
diffraction
wavelengths
Piston
Sound
Directionality
Acoustics
Animals

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Arts and Humanities (miscellaneous)

Cite this

The sound emission pattern of the echolocating bat, Eptesicus Fuscus. / artley, David J.; Suthers, Roderick.

In: Journal of the Acoustical Society of America, Vol. 85, No. 3, 1989, p. 1348-1351.

Research output: Contribution to journalArticle

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