Why It is useful?
Answer: When it comes to calling related projects then microphone is required thing there are so many calling related projects which can only run if microphone is attached to the device
Who will benefit from it?
Answer: All calling related projects needs microphone like call center apps and many mobile apps may need this feature to be supported
How should it work?
Answer: Microphones should be attached to the devices so that the application which need this can use it like us.