파라메트릭 스피커의 근접음장 방향성 특성연구Directional Characteristics of Parametric Loudspeakers in Near-field

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A parametric loudspeaker is a device to generate highly directional sound using ultrasounds. The parametric loudspeaker could be used to focus sound in a limited space, so it is important to study the characteristics of the parametric loudspeaker in near-field. Mechanism of the audible sound generation in the parametric loudspeaker is explained by nonlinear interaction of the ultrasounds and is modeled as KZK equation, the nonlinear wave equation which contains attenuation, nonlinearity and diffraction. To measure the directional characteristics of the parametric loudspeaker precisely, a method to reduce the spurious signal which taints the measured signal was invented. With the method, directivity patterns of the parametric loudspeaker were measured and compared to the approximated solution and piston sources.
Publisher
한국소음진동공학회
Issue Date
2005-11
Language
KOR
Citation

한국소음진동공학회 2005년도 추계학술대회, pp.545 - 550

URI
http://hdl.handle.net/10203/152040
Appears in Collection
ME-Conference Papers(학술회의논문)
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