Title:
SPEAKER SYSTEM
Document Type and Number:
Japanese Patent JP2004220256
Kind Code:
A
Abstract:
To provide a speaker system capable of reporting that an emergency broadcast is on air to a hearing-impaired person or the like.
This system comprises an acoustic signal input means 101 for inputting an acoustic signal, a DC power generation means 102 for generating DC power by rectifying the acoustic signal, an optical signal output means 103 for outputting an optical signal by the DC power, a transformer 104 for transforming the voltage of the acoustic signal, and a speaker 105 of acoustically transforming and outputting the acoustic signal. According to such a structure, it can be reported to the hearing-impaired person or the like that the emergency broadcast is on air.
Inventors:
SUGAWARA TETSUSHI
Application Number:
JP2003005874A
Publication Date:
August 05, 2004
Filing Date:
January 14, 2003
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
A61F11/04; G08B7/00; G08B27/00; H04R1/02; H04R27/00; H04R27/02; (IPC1-7): G08B7/00; A61F11/04; G08B27/00; H04R1/02; H04R27/00; H04R27/02
Attorney, Agent or Firm:
Gunichiro Ariga