Title:
SPEAKER APPARATUS
Document Type and Number:
Japanese Patent JP2006217348
Kind Code:
A
Abstract:
To provide a speaker apparatus which allows sufficient narrow directivity to be obtained without making the apparatus or an entire system large-scale or complicated.
The speaker apparatus includes a speaker unit and a sound guide means for letting radiant sounds from the speaker unit go out through an annular opening. The sound guide means comprises an outer cylinder part and an inner cylinder part, and radiant sounds from the speaker unit are let go out through an annular space (the annular opening) between the outer cylinder part and inner cylinder part.
Inventors:
TONEGAWA HIROSHI
SUGATA HIROSHI
SUGATA HIROSHI
Application Number:
JP2005028994A
Publication Date:
August 17, 2006
Filing Date:
February 04, 2005
Export Citation:
Assignee:
FOSTER ELECTRIC CO LTD
International Classes:
H04R1/34; H04R1/02; H04R1/40
Attorney, Agent or Firm:
Fujiharu Ijima
Nobushige Samejima
Nobushige Samejima
Previous Patent: RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM
Next Patent: COMPACT RANGE AND ITS MANUFACTURING METHOD
Next Patent: COMPACT RANGE AND ITS MANUFACTURING METHOD