Omnidirectional microphone
What is an omnidirectional microphone?
Omnidirectional microphones are mainly used in conference phone products, so we usually regard them as conference phones. The phone can also be connected to Internet conference calls through a PC, and can be connected to a mobile phone through the headphone jack to achieve the effect of a speaker and microphone.
Main features of omnidirectional microphone:
1. Omnidirectional microphones can be equipped with different models according to the size of different conference rooms. Omnidirectional microphones suitable for 1m, 2m, 3m, 4m, 5m, 6m and other different scopes in the conference room are basically the same as conference phones. It describes in detail how big the conference room is used by different types of conference phones, the range of omnidirectional microphone 360 degrees, and how many people are suitable for the meeting.
2, backup your audio in video conference system, video conference relies mainly on the network, the network many unstable factors, such as: interruption, instability, such as video conferencing terminals fault, and the omnidirectional microphone model with traditional PSTN telephone communication is the most stable way, so often used omnidirectional microphone for audio backup.
3. Omnidirectional microphone can automatically adjust the speaker's voice size and the distance between human and omnidirectional microphone, which mainly depends on the algorithm of DSP chip, including noise cancellation, echo cancellation, full-duplex, omnidirectional conference microphone, automatic gain control and other algorithms.
4, noise elimination. Can eliminate in addition to the human speech outside the noise (for example: air conditioning whir noise), but also according to the size of the speaker's voice to optimize the loud people, and small voice dilution reduction.
5. Echo cancellation. Need to make sure the speaker sound sent out, at the same time, do you want to put the speaker voice from the other side of the omnidirectional microphone back, usually mobile phone call listen carefully to hear the echo, is mainly due to the mobile phone short distance so is not very obvious, and the omnidirectional microphone is usually the distance from 2 m to 6 m so be sure to pick up the volume on the smaller, And can not be transmitted back through the speaker to form an echo.
6. Full duplex. Speaking at the same time can be two-way transmission, rather than waiting for one person to speak while the other has to listen. Wait until one person finishes speaking before the other person speaks.
Automatic gain control. When we talk less, the omnidirectional microphone doesn't get smaller as the sound gets smaller, and it doesn't get smaller as the distance increases.
