CARBONACEOUS ACOUSTIC DIAPHRAGM AND PROCESS FOR PRODUCING SAME

Title:

CARBONACEOUS ACOUSTIC DIAPHRAGM AND PROCESS FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2014/175329

Kind Code:

A1

Abstract:

Provided is a carbonaceous acoustic diaphragm which has a low density, a high flexural modulus, and a high value of acoustic velocity. The carbonaceous acoustic diaphragm comprises a low-density layer (12) constituted of a porous carbon object and high-density layers (10) which have been disposed on both surfaces thereof and are constituted of carbon. The low-density layer (12) has a structure in which pores (18) are spread in planes that are perpendicular to the diaphragm-thickness direction and the spread pores (18) and walls of the carbon (16) form alternating layers.

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Inventors:

ONODERA YUTAKA (JP)
SATAKE ATSUNORI (JP)

Application Number:

PCT/JP2014/061418

Publication Date:

October 30, 2014

Filing Date:

April 23, 2014

Export Citation:

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Assignee:

MITSUBISHI PENCIL CO (JP)

International Classes:

H04R7/02; H04R31/00

Foreign References:

JP2010157926A	2010-07-15
JPH04150500A	1992-05-22
JPS5619296A	1981-02-23

Attorney, Agent or Firm:

AOKI, Atsushi et al. (Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, JP)

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