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Knowledge Base

Background Noise and Current Noise Are Generated in a TE30 Conference

Publication Date:  2019-05-14  |   Views:  292  |   Downloads:  0  |   Author:  15292860971  |   Document ID:  EKB1100015166


Issue Description

A TE30 does not generate noises when it is connected to an external audio mixer. After the TE30 joins the conference, background noise and current noise are generated.

Handling Process

1. Connect the microphone directly to the TE30 to check whether there is background noise or current noise. If there is no noise, the problem is caused by the cable or audio mixer.

2. Check whether the TE30, audio mixer, and microphone are grounded together.

Root Cause

If devices are not grounded together, the common-mode interference cannot be effectively eliminated.


Make sure that the microphone, audio mixer, and TE30 are grounded together. After the change of grounding, noises disappear.