We found this website to check your microphone before getting in a cam to cam webcam chat. Once, you click on the play button and when you talk you should see that something is moving in the window. The technology used by onlinemictest.com is the same as the one of camgirl websites (HTML5). So, if your microphone works on onlinemictest it should also work on Livejasmin, streamate, stripchat and chaturbate.
Click the following link to test your microphone
https://www.onlinemictest.com/
Learn to improve audio quality for private chat sessions here