Voice Clarity Mic Saturation Test
Test description
For best Voice Clarity performance, microphone signals must not saturate when built-in speakers are rendering at full volume. Microphone saturation can cause signal clipping and dramatic degradation in audio quality.
Test details
| Specifications |
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| Expected run time (in minutes) | 1 |
| Category | Development |
| Timeout (in minutes) | 5 |
| Requires reboot | false |
| Requires special configuration | false |
| Type | automatic |
Test steps
- Render (default mode) and record (raw mode) several seconds of a logarithmic sine sweep at a fixed speaker gain and 0 dB microphone gain. The recording captures all microphone signals simultaneously.
- Repeat first step for each microphone channel, computing the peak amplitude for each microphone channel.
Pass/Fail criteria
The peak amplitude of every microphone signal must not exceed the threshold.
Troubleshooting
- Verify device is not in a configuration that produces abnormally high speaker-to-mic coupling factor (e.g., laptop in closed configuration).
- Equalize speakers and microphones to flatten frequency response and remove peaks/resonances.
- Use a microphone with lower sensitivity.
If your failure mode is not included on this list, search the error code in MSDN.
For generic troubleshooting of HLK test failures, see Troubleshooting Windows HLK Test Failures and Troubleshooting System Fundamentals Testing.
More Information
Parameters
| Parameter Name | Parameter Description |
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Additional Documentation
Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s): - Device.Audio additional documentation and System.Fundamentals additional documentation.