Hi All,
You can try the following suggestions and check if the audio quality will be improved.
    1. Make sure that there are no obstructions covering the microphone and speaker openings on the camera.
    2. Confirm that the microphone and speaker volume of the camera are set at a high level on our app.
    3. Ensure the camera is positioned to allow clear and unobstructed sound reception. Avoid placing it in enclosed spaces or near surfaces that may reflect sound.
    4. Test the audio with your mobile device positioned away from the camera, preferably in a different room. The proximity between the phone and camera during a voice call can cause audio feedback.

If the camera has the same behavior, we recommend sending an email to support.usa@tp-link.com with the following information:
Subject: [Forum Escalation][ID 674962] camera audio quality needs to be improved
Forum Nickname: [User Provided]
Thread URL:  https://community.tp-link.com/us/smart-home/forum/topic/674962
Camera Model&Version:  [User Provided]
Description: such as your phenomenon description, the camera's MAC address, the video showing the camera's audio quality, etc. [User Provided]

Once sent, a ticket will be created in our support system, and a member of the team will follow up to gather more information or troubleshoot a cause.
 
Best Regards