Sound and sound sources

Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

Abstract

There is no difference in principle between the infrasonic and ultrasonic sounds, which are inaudible to humans (or other animals) and the sounds that we can hear. In all cases, sound is a wave of pressure and particle oscillations propagating through an elastic medium, such as air. This chapter is about the physical laws that govern how animals produce sound signals and how physical principles determine the signals’ frequency content and sound level, the nature of the sound field (sound pressure versus particle vibrations) as well as directional properties of the emitted
signal. Many of these properties are dictated by simple physical relationships between the size of the sound emitter and the wavelength of emitted sound. The wavelengths of the signals need to be sufficiently short in relation to the size of the emitter to allow for the efficient production of propagating sound pressure waves. To produce directional sounds, even higher frequencies and shorter wavelengths are needed. In this context ‘short’ is measured relative to the size of the sound source. Some sound sources, such as dipoles and pistons, are inherently directional, whereas others, such as monopoles, are inherently omnidirectional.
Original languageEnglish
Title of host publicationComparative bioacustics : An overview
EditorsCharles Brown, Tobias Riede
Place of PublicationSharjah, UAE
PublisherBentham Science Publishers
Publication date5. Jan 2017
Pages3-61
Chapter1
ISBN (Print)978-1-68108-318-6
ISBN (Electronic)978-1-68108-317-9
Publication statusPublished - 5. Jan 2017

Cite this

Larsen, O. N., & Wahlberg, M. (2017). Sound and sound sources. In C. Brown, & T. Riede (Eds.), Comparative bioacustics: An overview (pp. 3-61). Sharjah, UAE: Bentham Science Publishers.
Larsen, Ole Næsbye ; Wahlberg, Magnus. / Sound and sound sources. Comparative bioacustics: An overview. editor / Charles Brown ; Tobias Riede. Sharjah, UAE : Bentham Science Publishers, 2017. pp. 3-61
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Larsen, ON & Wahlberg, M 2017, Sound and sound sources. in C Brown & T Riede (eds), Comparative bioacustics: An overview. Bentham Science Publishers, Sharjah, UAE, pp. 3-61.

Sound and sound sources. / Larsen, Ole Næsbye; Wahlberg, Magnus.

Comparative bioacustics: An overview. ed. / Charles Brown; Tobias Riede. Sharjah, UAE : Bentham Science Publishers, 2017. p. 3-61.

Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

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Larsen ON, Wahlberg M. Sound and sound sources. In Brown C, Riede T, editors, Comparative bioacustics: An overview. Sharjah, UAE: Bentham Science Publishers. 2017. p. 3-61