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Moving magnet planar coil type microphone

A planar coil and microphone technology, applied in the field of microphones, can solve problems such as the performance impact of condenser microphones, and achieve the effects of improving compliance, increasing sensitivity, and improving sensitivity

Inactive Publication Date: 2013-11-06
重庆市冠音泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the J-FET can be made very small now, due to its temperature characteristics, the performance of the condenser microphone (electret microphone) is affected by the influence of electromagnetic interference, etc.

Method used

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  • Moving magnet planar coil type microphone
  • Moving magnet planar coil type microphone
  • Moving magnet planar coil type microphone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] A moving magnet planar coil microphone includes a planar spiral coil 1 and a magnetic film 2 , and the planar spiral coil 1 and the magnetic film 2 face each other with a gap between the planar spiral coil 1 and the magnetic film 2 . In this example:

[0016] A cover 3 is provided outside the spiral planar coil 1 and the magnetic film 2, an acoustic channel is provided on the cover 3, and a dustproof cloth 4 is covered on the acoustic channel.

[0017] The gap is formed by a pad 7 arranged between the planar spiral coil 1 and the magnetic film 2. The pad 7 can be directly placed between the planar spiral coil 1 and the magnetic film 2, or can be connected to the magnetic film 2. It can also be Set on the cover 3. There are many specific implementations of the pad 7, for example:

[0018] (1) The pad 7 is a pad;

[0019] (2) The pad 7 is a ring;

[0020] (3) The pad 7 is provided with protrusions on the edge of the spiral planar coil (refer to image 3 );

[0021] ...

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PUM

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Abstract

The invention relates to a moving magnet planar coil type microphone which comprises a spiral planar coil and a magnetic film, wherein eh spiral planar coil is opposite to the magnetic film, and a gap is arranged between the spiral planar coil and the magnetic film. Compared with the prior art, the invention adopts a mode that an original fixed magnet is changed into a movable magnet and the movable magnet moves with the sound pressure action, thereby changing the structure that a movable coil is connected with a vibration film (sound film) in the movable coil microphone; the movable coil is a planar coil made by changing the common spiral coil into the spiral planar coil, thereby greatly lowering the size in the height direction of the movable coil, and realizing the miniaturization. In the invention, the impedance is depended on the parameter of the spiral planar coil; therefore, the moving magnet planar coil type microphone has low impedance without an impedance converter, and can carry out remote transmission.

Description

technical field [0001] The invention relates to a microphone, in particular to a moving magnet planar coil microphone. Background technique [0002] A common moving coil microphone is a coil (moving coil) suspended on a fixed permanent magnet core, and the coil is bonded to a vibrating membrane (sound membrane) in a stress-free and unstressed state. External sound pressure causes the diaphragm to vibrate. At this time, it will drive the coil to move. As a coil moving in the magnetic field, it will generate a dynamic electromotive force. varying voltage output. This completes the role of sound-to-electricity conversion. This dynamic microphone is difficult to miniaturize due to its components. Although the condenser microphone can be miniaturized, the commonly used condenser microphone (electret microphone), the general condenser microphone is to paste a metallized film on a metal ring to form a film ring, and pass the film ring through a The washer is separated from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/08H04R9/04
Inventor 吴宗汉
Owner 重庆市冠音泰科技有限公司