Dear Candidate,
Please check that the computer you are using does not have any hardware issues. Talk clearly into the microphone for the full five seconds until your audio is fully detected.
1. Your system volume should be high.
2. During the Hardware Test when the system is recording your audio, please talk clearly into the microphone for the full five seconds.
3. Also ensure that all other multimedia applications like Skype etc have been closed on your system while you attend the assessment.
4. Ensure you have a fast and stable internet connection.
If this issue persists, please be informed it's a hardware issue and you are advised to change the device.