Title:
MICROPHONE DEVICE
Document Type and Number:
Japanese Patent JP3504135
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate the need for the waterproof structure of a second microphone by constructing a first microphone sigh that outer air vibration is inputted to a diaphragm and constructing the sectioned microphone, so that the diaphragm is isolated from the outer air vibration.
SOLUTION: At connecting of a horn mouth 1 and a megaphone body, a straw packing 6 is engaged with the inner side of the horn mouth 1 and is fitted via a waterproof packing 7 constituted of rubber and soft resin at an outer side. An interval between the horn mouth 1 and the megaphone body is filled so that an airtight and waterproof structure is obtained. A microphone unit 21, constituted of a main microphone 22 which is to be a first microphone and a sub-microphone 23 which is to be a second microphone is arranged at the back of the upper inner part of the megaphone body 2. The main microphone 22 and the sub-microphone 23 are housed in a microphone pressing part 24 via thin films 22a and 23a, having a buffer operation and a waterproof characteristic, and they are engaged with a rib 25 at the back of the megaphone body.
Inventors:
Hisafumi Sakanoue
Application Number:
JP5565098A
Publication Date:
March 08, 2004
Filing Date:
January 29, 1998
Export Citation:
Assignee:
Noboru Electric Mfg. Co., Ltd.
International Classes:
H04R1/28; H04R3/02; H04R27/04; (IPC1-7): H04R3/02; H04R1/28; H04R27/04
Domestic Patent References:
| JP53139488A | ||||
| JP6454897A | ||||
| JP476796U |