Issue Description
A local network running a few minutes, then appear the "pound" playing drums
Handling Process
Upon inspection, in the local network some site, one of the microphones was not used by user d and the user directly put it on the sound source bottom, take away the microphone and troubleshooting.
Root Cause
When the microphone is too close to the sound source, the echo can’t be offset by the system, causing the sound back and forth shock within the system, and thus appear the sound of playing drums.
