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A Self-Silenced Sound Beam
Ansvarlig organisasjon
2010 (engelsk)Inngår i: Acoustical Physics, ISSN 1063-7710, E-ISSN 1562-6865, Vol. 56, nr 5, s. 637-639Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Parametric loudspeakers are transmitting two high power ultrasound frequencies. During propagation through the air, nonlinear interaction creates a narrow sound beam at the difference frequency, similar to a light beam from a torch. In this work is added the physical phenomenon of propagation cancellation, leaving a limited region within which the sound can be heard—a 1 meter long cylinder with diameter 8 cm. It is equivalent to a torch which would only illuminate objects within 1 meter. The concept is demonstrated both in simulation and in experiment.

sted, utgiver, år, opplag, sider
Pleiades Publishing , 2010. Vol. 56, nr 5, s. 637-639
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Identifikatorer
URN: urn:nbn:se:bth-7680DOI: 0.1134/S1063771010050064ISI: 000281713600006Lokal ID: oai:bth.se:forskinfo358C6270B292974CC12578050032B3AEOAI: oai:DiVA.org:bth-7680DiVA, id: diva2:835324
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http://www.maik.ru/cgi-perl/journal.pl?lang=eng&name=acoustTilgjengelig fra: 2012-09-18 Laget: 2010-12-26 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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