A wireless microphone is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone, it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the microphone by radio waves to a nearby receiver unit, which recovers the audio. The other audio equipment is connected to the receiver unit by cable. Wireless microphones are widely used in the entertainment industry, television broadcasting, and public speaking to allow public speakers, interviewers, performers, and entertainers to move about freely while using a microphone to amplify their voices.
There are many different standards, frequencies and transmission technologies used to replace the microphone's cable connection and make it into a wireless microphone. They can transmit, for example, in radio waves using UHF or VHF frequencies, FM, AM, or various digital modulation schemes. Some low cost (or specialist) models use infrared light. Infrared microphones require a direct line of sight between the microphone and the receiver, while costlier radio frequency models do not. (-wikipedia)
Once you have the Pi all set up, you’ll be able to amplify your voice with any all-in-one radio or boombox. This could be useful for giving lectures or presentations where it might be hard to hear you and there isn’t a professional PA system. You could also use it in a van or other large vehicle to communicate over the car’s speakers.
Here is the step-by-step instructions how raspberry pi can be used as a very good quality wireless microphone and can be used in class room, seminar, so keep reading.
|1||Raspberry Pi (Any model, I used B)||1|
|4||Speaker with Amplifier||1|
|5||9 Volt Battery + |
5 Volt regulator (LM7805) or Power Bank
Raspberry Pi Case
|7||A SD card with Raspbian on it (minimum 2 GB)||1|
|8||FM Antenna (simple jumper wire works fine)||1|