ACOUSTIC APPARATUS AND TELEPHONE CONVERSATION APPARATUS

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EP 1 799 010 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	published in accordance with Art. 158(3) EPC

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	26.09.2007 Bulletin 2007/39

(43)	Date of publication:
	20.06.2007 Bulletin 2007/25

(21)	Application number: 06712705.0

(22)	Date of filing: 31.01.2006

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International Patent Classification (IPC):

H04R 3/02^(2006.01)

(86)	International application number:
	PCT/JP2006/301562

(87)	International publication number:
	WO 2007/032100 (22.03.2007 Gazette 2007/12)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

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Priority:

14.09.2005 JP 2005267371

(71)	Applicant: Mitsubishi Denki Engineering Kabushiki Kaisha
	Chiyoda-ku Tokyo 102-0073 (JP)

(72)	Inventors:
	SUGIURA, Tomohiro c/o Mitsubishi Denki Engineering Kabushiki Kaisha Tokyo 102-0073 (JP) YOSHIDA, Shunji c/o Mitsubishi Denki Engineering Kabushiki Kaisha Tokyo 102-0073 (JP)

(74)	Representative: Pfenning, Meinig & Partner GbR
	Patent- und Rechtsanwälte Theresienhöhe 13 80339 München 80339 München (DE)

(54)	ACOUSTIC APPARATUS AND TELEPHONE CONVERSATION APPARATUS

(57) An acoustic apparatus has permanent magnets 2 and 3, which have north poles and south poles magnetized alternately in a stripe-like fashion, at the front and back of a diaphragm 1, respectively; and has a conductor circuit 4 wired on the diaphragm 1 along the stripe-like poles of the permanent magnets 2 and 3. This offers an advantage of being able to prevent an echo. The diaphragm 1, permanent magnets 2 and 3, conductor circuit 4, spacer 5, and iron plates 6 and 7 are installed in a baffle 8.