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Speaker that uses the non-linearity in air to create sound
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
2005 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

The aim of this work was to investigate theoretically and experimentally the fact that it is possible to create sound by using the nonlinearity in air. A speaker was built verifying the theory that if at least two high frequencies at high amplitude is propagating through a nonlinear medium, for example air, the difference frequency of these two is created in mid air. Measurements and simulations were performed on what the pressure distribution from a ultrasonic transducer looks like.

Place, publisher, year, edition, pages
2005. , 62 p.
Keyword [en]
Parametric loudspeaker, Difference frequency generation, Biharmonic boundary condition, Nonlinear acoustics
National Category
Mechanical Engineering
URN: urn:nbn:se:bth-5498Local ID: diva2:832881
Available from: 2015-04-22 Created: 2005-05-08 Last updated: 2015-06-30Bibliographically approved

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