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Abnormal howling like sound coming from system speakers when microphone volume is turned up - ThinkPad

Symptom

Abnormal howling like sound coming from system speakers when microphone volume is turned up

Affected configurations

All ThinkPad systems with speakers located at the front edge of the bottom cover.

Solution

This issue occurs due to the Microphone Volume level in Master Volume being set to high.

Preventive measures:

  • Turn down the microphone or speaker volume levels to avoid the howling sound.
  • Open Volume Control>Option>Property>Play>Uncheck Microphone in order to hide Microphone in Master Volume.