Internal Microphone Issue

[PhilT1365]

Hi. After installing the app. I used it for a few days and later I realised that my Internal Mic had an issue. Well, my friends told me I should get it checked because it distorts, makes white noise sound, goes silent sometimes. And sometimes it works just fine. So I tried deleting/uninstalling the app and removed everything that has to do with it. Is it a known issue or is it a hardware problem?