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


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
PublisherEuropean Acoustics Association
Number of pages4
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


ConferenceForum Acusticum
Abbreviated titleFA


Dive into the research topics of 'Laser-induced point source for scale model measurements'. Together they form a unique fingerprint.

Cite this