The microphone test. Using this website, you can find out whether your microphone is working properly by running an online mic test. You do not need to download or install any third-party software since this is a browser microphone test.A mic test determines whether or not your mic is capable of producing electrical signals. A microphone is tested to see if it is functional, durable, and reliable. The process produces accurate results by following a set of steps. Many professional audio engineers strongly recommend mic testing as it is convenient, easy to access, and time-saving. You can now access some of its best features on any device.