Title :
Generation of a 3D plane-wave field by wave number domain focusing using spherical harmonics
Author :
Chang, Ji-Ho ; Kim, Yang-Hann
Author_Institution :
KAIST, Daejeon
Abstract :
A novel method of generating a plane-wave field using a loudspeaker array has been proposed by Choi and Kim. In the method, a plane wave is generated by concentrating acoustic potential energy on a point in wave number domain. In this paper, encoding by rigid sphere microphone is applied to wave number domain focusing, which provides advantages in measuring sound field. Spherical harmonics expression and 3D spatial Fourier transform are introduced for it. By this method, a plane wave that propagates to any direction we want in 3D space is well reproduced.
Keywords :
Fourier transforms; acoustic field; acoustic intensity; acoustic signal processing; harmonic generation; loudspeakers; microphones; 3D plane-wave field generation; 3D spatial Fourier transform; acoustic potential energy; encoding; loudspeaker array; rigid sphere microphone; sound field; spherical harmonics; wave number domain focusing; Automatic generation control; Brightness; Control systems; Electronic mail; Encoding; Fourier transforms; Loudspeakers; Mechanical engineering; Microphone arrays; Transfer functions; spherical harmonics; wave number domain focusing;
Conference_Titel :
Control, Automation and Systems, 2007. ICCAS '07. International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-89-950038-6-2
Electronic_ISBN :
978-89-950038-6-2
DOI :
10.1109/ICCAS.2007.4406657
