Handling the Internal Mic Noise Gate
Usually, the internal noise suppression should be able to effectively reduce the noise from the room, but there may be cases where an additional noise gate is helpful.
The Noise Gate ensures that a remaining background noise is muted during pauses in speech.
Noise Gate – Threshold
You can set a threshold level at which the system will mute the microphone if the signal level falls below.
- The noise gate will open the microphone audio output only when the microphone in use exceeds the defined threshold value.
- You can use the slider to adjust the threshold level from -70 dB to -30 dB in steps of 1 dB.
To achieve the highest possible speech intelligibility, the background noise level in the room should not exceed 45 dBA. This is a good initial value for testing and, if necessary, adjusting the Threshold while the meeting is taking place.
Noise Gate – Hold Time
This setting determines how quickly the microphone reduces the gain after the level drops below the threshold. A delay of up to 500 ms can be set.
- You can adjust the Hold Time between 100 ms and 500 ms in steps of 50 ms.
The optimum settings are depending on the actual room conditions and the ambient noise in the room. We recommend starting with a setting of 100 ms and gradually increase this value depending on the type of speech and the ambient noise in the room.
Noise Gate – Range
The noise gate range parameter defines how much the noise gate suppresses the microphone signal when it is active.
- You can adjust the Range between – 80 dB to 0 dB in steps of 1 dB
- 80 dB effectively means muting the signal when active
- 0 dB means that the noise gate will not have an effect (bypassed)
A good starting point is – 40 dB to determine if the noise gate suppresses enough signal below the noise gate threshold. Depending on the type of signals in the room, you can set this parameter to either let more signal below the noise gate threshold through or suppress it more.