Laser-induced point source for scale model measurements

Javier Gómez Bolaños, Ville Pulkki, Pasi Karppinen, Edward Hæggström

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

The laser-induced air breakdown is produced by focusing a high energy pulsed laser beam which heats rapidly the air at the focusing point. This produces a tiny explosion which generates a sonic impulse. The sonic pulse is repeatable, omnidirectional and broadband. Furthermore, the laser-induced air breakdown can be projected inside an enclosed space through a window of transparent material thus providing a massless source. The laser-induced air breakdown concentrates most of its sonic energy between 1 kHz and 100 kHz which suggests that it can be used for scale model measurements. The impulse response of an enclosed space made of glass, that represents a rectangular room, was measured using laser-induced air breakdown and compared to a computer simulation. The measured impulse response matched the simulated response of the scale room which confirms that laser-induced breakdown can be used as point source in scale model acoustic work.

Original languageEnglish
Title of host publicationForum Acusticum, FA 2014
Number of pages4
Volume2014-January
ISBN (Electronic)9788361402282
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
EventForum Acusticum - Kraków, Poland
Duration: 7 Sep 201412 Sep 2014
Conference number: 7

Conference

ConferenceForum Acusticum
Abbreviated titleFA
CountryPoland
CityKraków
Period07/09/201412/09/2014

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