Title:
HAND SET
Document Type and Number:
Japanese Patent JPS61123388
Kind Code:
A
Abstract:
PURPOSE: To reduce the change of sound quality by the change of closely touched condition between a hand set and ears by providing a hole on the part of the opening side of talk receiving side of housing, and combining with the front of the diaphragm the talk receiving unit acoustically.
CONSTITUTION: Plural sound holes 5 are set on the side of the opening part of the housing 1 of a hand set. The front of diaphragm 4 of a receiver 3 is connected with the outside acoustically. Thus, even in case of contacting closely the hand set with ears, a part of sound wave is leaked from a hole 5. As the result, the increase in the sound pressure of the receiving mouth 2 is reduced and the change of acoustic character is lessened, too.
Inventors:
YOSHIKAWA SUSUMU
ENOMOTO MITSUTAKA
ISHIHARA SUMIO
ENOMOTO MITSUTAKA
ISHIHARA SUMIO
Application Number:
JP24498084A
Publication Date:
June 11, 1986
Filing Date:
November 20, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04R1/28; H04R1/22; (IPC1-7): H04R1/28
Domestic Patent References:
| JP49102734B | ||||
| JPS508489U | 1975-01-28 |
Attorney, Agent or Firm:
Akira Kobiji (2 outside)