Title:
【発明の名称】超指向性スピーカシステム及びスピーカシステムの駆動方法
Document Type and Number:
Japanese Patent JP3000982
Kind Code:
B2
Abstract:
An ultra-directional speaker system has a speech generation means, an ultrasonic generation means, an amplitude modulation means to which the speech generation means and ultrasonic generation means are connected, an electro-acoustic transducer means which converts an ultrasonic modulated signal that is output from the amplitude modulation means to an acoustic signal, and a virtual sound source positioning means that establishes the position of a virtual sound source by detecting the position of a listener by detecting the ultrasonic waves that are output from the electro-acoustic transducer means and reflected from the listener.
Inventors:
Kouji Hirayagi
Application Number:
JP32254697A
Publication Date:
January 17, 2000
Filing Date:
November 25, 1997
Export Citation:
Assignee:
NEC
International Classes:
H04R1/32; H04R3/00; (IPC1-7): H04R1/32; H04R3/00
Domestic Patent References:
| JP3159400A | ||||
| JP61264995A | ||||
| JP4280198A |
Attorney, Agent or Firm:
Yasuyuki Hata