Saturday, 11 June 2016

Abigail Tan's Independent Learning Log 3

Name: Abigail Tan
Index Number: 1
Week: 2
Date: 11/6/16


What I did:
I am really into music, and my favourite stars sing into a microphone. I wondered how microphones allow them to be heard in a huge stadium.

What I learned:
Microphones are a type of transducer - a device which converts energy from one form to another. There is a diaphragm in the microphone. When the speaker/singer speaks/sings into it, there are sound waves and the sound waves vibrate the diaphragm. When the diaphragm vibrates, it causes other parts of the microphone to vibrate, producing kinetic energy. The kinetic energy is converted into electrical energy which becomes the audio signal. The loudspeaker, which receives the audio signal, is also a transducer, and converts the audio signal which is the electrical energy back to sound energy through the loudspeaker.

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