Title:
HEADPHONE
Document Type and Number:
Japanese Patent JPH04347997
Kind Code:
A
Abstract:
PURPOSE: To provide the compact head phone, which is used by inserting in an auricle capable of reproducing a satisfactorily low sound.
CONSTITUTION: At the rear part inside housings 1 and 2 with outer dimensions wide enough at least to insert the front part having a front sound hole 5a into an auricle, a speaker unit 3 is arranged. Sound paths 7 and 8 are arranged between a diaphragm 3a and the front sound hole 5a of the speaker unit 3 and a passive diaphragm 9 oscillating by the output of the speaker unit 3 so as to close the front sides of the sound paths 7 between the front sound hole 5a and the sound paths 7, is provided.
Inventors:
HASHIMOTO JUNICHI
TAKEDA YUKIO
KOGURE KAZURO
TAKEDA YUKIO
KOGURE KAZURO
Application Number:
JP4000491A
Publication Date:
December 03, 1992
Filing Date:
March 06, 1991
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
ASHIDA ONKYO KK
ASHIDA ONKYO KK
International Classes:
G10K11/18; H04R1/10; H04R1/28; (IPC1-7): G10K11/18; H04R1/10; H04R1/28
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)