The wireless microphone is looking easy but will you really use it?

　　The earliest microphones are connected cable, karaoke OK in the studio or small space to use no problem on the stage if only quietly singing the song may also be nothing wrong, but want to show dancing is not easy The. So now on stage performance, we are more inclined to use the wireless microphone.
　　Wireless microphone convenience for all to see, in addition to stage performances, is also widely used in KTV, conference rooms and other occasions. Most users in the use of wireless microphones, that as long as the connection device can speak, in fact, the wireless microphone in use there are many tips and precautions, if you do not understand its working principle and characteristics, you can not really use a wireless microphone The
　　The wireless microphone is looking easy but will you really use it?
　　wireless microphone

　　How does the wireless microphone work?
　　Wireless microphone, also known as wireless microphone, consists of two parts of the launch and reception. Wherein the transmitting part is powered by the battery, the microphone converts the sound into the audio signal and is processed by the internal circuit to transmit the radio wave of the audio information to the surrounding space.
　　The receiving part is usually powered by the power supply, first by the receiving antenna to receive the radio part of the radio wave, and then through the internal circuit processing, extract the audio signal, and then through the output signal line to the sound system to complete the audio signal wireless transmission.
　　Understand the working principle of the wireless microphone, the following talk about the use of wireless microphones need to pay attention to what the problem.
　　First, pay attention to impedance matching
　　The output impedance of the wireless microphone is the same as the input impedance of the amplifier, which is the best match. If the mismatch ratio of more than 3: 1, will have an impact on the audio transmission effect, although also can be used, but the high and low frequency sound will be a significant loss.

　　Second, pay attention to working distance and near effect
　　In the hand-held wireless microphone speech or singing, the working distance between the microphone and the mouth is generally 750px-1000px more appropriate, too far away will increase the echo, too close will be due to excessive signal distortion caused by audio, affecting the clarity Is the "near the effect", close broadcast, the low frequency sound will be significantly improved.
　　Of course, the effect of the near-effect on the sound is not completely undesirable, experienced and profound professional singing people, and sometimes will use this effect to change the sound effect.

　　BOYA BY-M1 Clip-On Microphone for DSLR Camera/Smartphone/Camcorder/Audio Recorder
　　BOYA BY M1 Lavalier Microphone
　　BOYA is a high-quality condenser microphones brand; it creates the true nature of sensory experience customers. This BY-M1 microphone with clip-on mic is specially designed for smartphones, DSLR, Camcorders, audio recorders, PC, etc.
　　Features:
　　Superb sound for presentations and video recording.
　　Clip-on microphone design for smartphones, DSLR, camcorders, etc.
　　Omni directional condenser microphone.
　　High-quality condenser is ideal for video use.
　　Low handling noise.
　　Specifications:
　　Transducer: Electret Condenser.
　　Frequency Range: 65Hz-18KHz.
　　Signal/Noise: 74dB SPL.
　　Sensitivity: -30dB +/-3dB / 0dB=1V/Pa, 1kHz.
　　Output Impedance: 1000 Ohm or less.
　　Connector: 3.5mm (1/8") 4-pole gold plug.
　　Battery Type: LR44.
　　Dimensions: Microphone: approx.18.00mmH x 8.30mmW x 8.30mmD; Cable: 6.0m.
　　Weight: Microphone: approx.2.5g; Power Module: approx.18g.

　　100% Brand new.