publication . Conference object . 2012

The effect of high level multi-tone excitation on the acoustic properties of perforates and liner samples

Hans Bóden;
Open Access English
  • Published: 04 Jun 2012
  • Publisher: KTH, MWL Marcus Wallenberg Laboratoriet
  • Country: Sweden
Abstract
This paper discusses the effect of high level multi-tone acoustic excitation on the acoustic properties of perforates and liner samples. It is based on a large experimental study of the nonlinear properties of these types of samples without mean grazing or bias flow. It is known from previous studies that high level acoustic excitation at one frequency will change the acoustic impedance of perforates at other frequencies, thereby changing the boundary condition seen by the acoustic waves. This effect could be used to change the impedance boundary conditions and for instance increase the absorption. It could obviously also pose a problem for the correct modelling...
Subjects
arXiv: Computer Science::Sound
free text keywords: Acoustic excitation, Different frequency, Experimental datum, Experimental studies, Frequency components, Impedance boundary conditions, Nonlinear properties, Sound transmission, Acoustic impedance, Acoustic wave transmission, Boundary conditions, Aeroacoustics, Fluid Mechanics and Acoustics, Strömningsmekanik och akustik, Excitation, Electrical impedance, Acoustics, Nonlinear system, Acoustic wave, Boundary value problem, Acoustic space, Materials science, Sound transmission class
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