| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the degree of freedom of an installation place, and enable a user to easily setting directivity of sounds. <P>SOLUTION: A microphone 2 is installed at a listening position so that a speaker array 10 radiates a test audio beam corresponding to a measuring signal, sweeping for gradually changing an angle of a test audio beam is executed, and the microphone 2 collects the audio beam. A beam angle detector 5 obtains a horizontal radiation angle of sounds of multi-channel on the basis of measured data stored in a level measuring part 4. A control unit 6 decides the horizontal directivity of each of sounds, and sets horizontal directivity for a beam control unit 8. Radiation and vertical sweeping of the test audio beam with the set horizontal directivity is successively executed for each channel, and a vertical radiation angle of sounds is obtained for each channel. The control unit 6 decides the vertical directivity of each of sounds, and sets directivity for the beam control unit 8. <P>COPYRIGHT: (C)2007,JPO&INPIT |
