What is the function and welding method of the two way radio microphone?

Among the many radio components, there is a small component that determines the energy conversion device of the radio that converts the sound signal into an electrical signal is the microphone (MIC). The microphone is the energy that converts the sound signal into an electrical signal. The conversion device is a device exactly opposite to the speaker (electricity → sound). It is the two terminals of the sound equipment, the microphone is the input, and the speaker is the output. Also known as microphone, mics, microphones.

The use of MIC should stipulate its working voltage and load resistance, different use conditions, its sensitivity has a great impact, the sensitivity of the microphone can be analyzed in this way, mic can work, and the sensitivity can also be adjusted through R2. But the noise problem is not easy to say, if the noise problem is to see if the information input of our circuit is enough, and also to see what product this microphone is used for, different products and different circuits are used. Microphones are different, one radish and one pit, microphone should choose depend on circuit.

From the working principle: carbon particle type, electromagnetic type, capacitive type, electret capacitive type, piezoelectric crystal type, piezoelectric ceramic type, silicon dioxide type, etc.
From the size point of view, the electret type can be divided into several types.
From the directionality of the microphone, it can be divided into omnidirectional, unidirectional and bidirectional (also known as noise canceling).
Divided from the polarization method, diaphragm type, back pole type, front pole type. From the structural point of view, it can be divided into grid spot welding type, grid crimping type, and pole ring connection type.
Divided from the external connection mode: ordinary solder joint type, with PIN foot type, concentric circle type.

Microphone internal structure parameters:

Microphone curve:

External dimensions of microphone

Operation steps of welding intercom components MIC (microphone):

1. Check the MIC: select a MIC with good solder joints and a soundproof non-woven fabric at the bottom of the MIC for spare use.

2. Add tin: use 0.8 mm tin wire to add tin to the MIC two solder joints. Note that the tin joints cannot short-circuit the two solder joints with each other or the MIC shell.

3. Welding the MIC connecting wire: Weld the connecting wire from the right to the left (see the figure) and solder the connecting wire to the two welding points of the MIC.

Precautions for microphone welding.

4. Self-inspection: round and full solder joints, no short-circuit phenomenon, no false soldering, virtual soldering, and no sharpening of solder joints. The positive and negative connecting wires of MIC cannot be interchanged with each other and must be consistent with the model; the solder joints have no leakage holes .

The role of the rubber sleeve on the microphone:

The role of the rubber sleeve is to prevent shock, prevent the sound of friction with the shell, and interfere with the effect of the call.