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.
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