Electret microphone detection circuit
A technology of electret microphone and detection circuit, which is applied in the direction of electrical components, etc., can solve problems such as damage, increased production cost, and long detection time, and achieve the effects of avoiding damage, improving detection efficiency, and improving detection yield
Active Publication Date: 2021-02-23
SHENXUN COMP KUNSHAN
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Problems solved by technology
However, due to the need to weld the electret microphone in the above test process, the detection time is longer
And because the electret microphone is small in size, it is easy to be damaged in the repeated welding process, which increases the production cost
[0004] In view of this, it is necessary to develop an electret microphone detection circuit, which is used to quickly and efficiently detect the performance of the electret microphone, so as to reduce the current detection method which not only affects the quality of the electret microphone, but also increases the cost of production
Method used
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[0022] In order to facilitate the understanding of the contents of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein.
[0023] see figure 1 , figure 1 A schematic structural diagram of an electret microphone detection circuit of the present invention is shown. In this embodiment, the electret microphone detection circuit 100 of the present invention includes:
[0024] Connecting plug 110, the connecting plug includes a left channel connecting line 111, a right channel connecting line 112, a microphone connecting line 113 and a grounding line 114;
[0025] A first speaker 120, which is connected between the left channel connecting wire 111 and the ground wire 114, the first speaker 120 is used to receiv...
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The invention discloses an electret microphone detection circuit. The circuit comprises a connecting plug which comprises a left channel connecting line, a right channel connecting line, a microphoneconnecting line, and a grounding line; a first loudspeaker is connected between the left channel connecting wire and the grounding wire; a second loudspeaker is connected between the right channel connecting wire and the grounding wire; the first microphone connector is provided with a plurality of connecting terminals, and the plurality of connecting terminals are used for placing the electret microphone; a capacitor bank and a microphone connector are connected in parallel between the microphone connecting wire and the grounding wire; a control switch is used for controlling the on and off of the electret microphone detection circuit; and a notebook computer is used for recording voice and playing the voice through the first loudspeaker and the second loudspeaker. According to the electret microphone detection circuit, the damage to the electret microphone in the welding process is avoided, and the detection yield is improved.
Description
【Technical field】 [0001] The invention relates to a detection circuit, in particular to an electret microphone detection circuit. 【Background technique】 [0002] Electret microphone, also known as electret microphone, consists of two parts: acoustic-electric conversion and impedance conversion. The key component of the acoustic-electric conversion is the electret diaphragm, which is an extremely thin plastic diaphragm, on which one side is evaporated with a layer of pure gold film, and then after being electretized by a high-voltage electric field, opposite charges reside on both sides. The steamed gold surface of the diaphragm is outward and connected with the metal shell, and the other side of the diaphragm is separated from the metal plate by a thin insulating gasket. In this way, a capacitor is formed between the evaporated gold film and the metal pole plate. When the electret diaphragm encounters sound wave vibration, it causes the electric field at both ends of the c...
Claims
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IPC IPC(8): H04R29/00
CPCH04R29/00
Inventor 张荣斌
Owner SHENXUN COMP KUNSHAN