Hello Richard Chambers,
Thanks for getting back to us. The additional information is a great help too.
Based on the apps you used, the most recognizable difference between them is a lack of built-in noise suppression, which is one of the things that can contribute to a feedback echo. Messenger app does have a built-in noise suppression system, while Telegram only support group call and Whatsapp only support Noise suppression on newer version of iOS and Android phone. Without it, your microphone might pick up sound from your speaker, which cause a loop of echo, especially if you are using laptop speaker instead of a headset.
Here is a few things you can do to improve this:
- Use a headset in calls: It will reduce the amount of sound that the mic pickup from the speaker, which significantly improve the call quality.
- Mute yourself when not talking: A quick way for you to identify the issue is that you can mute yourself when not talking to see if the echo persists. You can also ask the other person to do the same to see if everything is alright with that.
- For the latest version of Windows 11, it also enable built in Noise suppression, however, it only works for modern CPU which supports it. You can check it by going to Settings > System > Sound > Choose your Input device and see if Noise Suppression is available.
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