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2 079 978

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C1

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IPC

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Application

94033245/28, 1994-09-08

(22)

Actual filing date

1994-09-08

(45)

Published

1997-05-20

(72)

Inventor

Temnov A.M.Snegirev V.P.Naumov V.L.Mar'In V.I.Salomatin I.A.Gudkova N.B.Zemljakov V.E.

(73)

Holder

Gosudarstvennoe Nauchno-Proizvodstvennoe Predprijatie

MIDJET-SIZE ELECTRET MICROPHONE Russian patent published in 1997 - IPC

Abstract RU 2079978 C1

FIELD: electret microphones for hearing aids. SUBSTANCE: microphone has case with pipe, membrane, electrode with hole, electret placed above membrane in a spaced relation, matching amplifier. Made directly in membrane, opposite holes in electrode, are equalizing holes in the quantity of 1+n, 10 mcm in sectional size. EFFECT: improved design. 1 dwg

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RU 2 079 978 C1

Authors

Temnov A.M.

Snegirev V.P.

Naumov V.L.

Mar'In V.I.

Salomatin I.A.

Gudkova N.B.

Zemljakov V.E.

Dates

1997-05-20—Published

1994-09-08—Filed

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