Device for protecting a microphone from external disturbances

• US 6,201,876 B1
• Filed: 01/30/1998
• Issued: 03/13/2001
• Est. Priority Date: 01/31/1997
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Inventors: Eerikainen, Jukka, Niemi, Mikko
• Primary Examiner(s): LE, HUYEN D
• Application Number:
  US09/015,572
• Time in Patent Office: 1,138 Days
• Field of Search: 381/355, 381/359, 381/360, 381/361, 381/FOR.147, 381/FOR.148, 381/322, 381/191, 381/365, 361/818, 361/816, 361/814
• US Class Current: 381/355
• CPC Class Codes: H04M 1/03 Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
• CPC Class Codes: H05K 9/00 Screening of apparatus or components against electric or magnetic fields devices for absorbing radiation from an antenna H01Q17/00

Abstract

The invention relates to a method for protecting a microphone (15) installed in an apparatus against external disturbances and to a disturbance eliminator particularly for a microphone. In accordance with the invention, the microphone (15) is encased in an electrically conducting casing (1), the wall (8) of which is formed of at least two layers of elastic material (81, 82), of which the first layer (81) is of insulating material and the second layer (82) is of conducting material.

Claims

1. A disturbance eliminator particularly for a microphone, characterized in that the disturbance eliminator comprises a casing (1) having at least one aperture for sound and at least one aperture for wiring means, a wall (8) of said casing including at least two layers of material (81, 82) in a contiguous relationship throughout said casing, of which a first layer (81) is of insulating material and a second layer (82) is of electrically conducting material and said materials of said first layer and of said second layer are flexible.

2. A disturbance eliminator according to claim 1, characterized in that said conducting layer (82) of said wall (8) forms an external layer of said casing (1).

3. A disturbance eliminator according to claim 2, characterized in that said second layer of electrically conducting material (82) of said wall (8) is electrically coupled to a frame (9a) of an apparatus by fitting the microphone (15) in said casing (1) of the disturbance eliminator into an installation recess (10) for said apparatus.

4. A disturbance eliminator according to claim 2, characterized in that said casing (1) comprises at least two parts:

a cage (2) and a lid (3), which cage (2) has a microphone space (4) for the microphone (15) and which microphone space (4) can be closed with said lid (3).

5. A disturbance eliminator according to claim 4, characterized in that said casing (1) includes a connection piece (7), by which said lid (3) is connected to said cage (2), which cage (2), lid (3) and connection piece (7) form a solid body.