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Magnetism in Microphones!

Mrs. Newton's 4th Period
by

Ava Pham

on 6 March 2013

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Transcript of Magnetism in Microphones!

HISTORY! Types of Microphones

Dynamic Microphones- In dynamic microphones a physical cone acts like a lens to concentrate the incoming sound waves.

Ribbon Microphones -Ribbon microphones consist of a thin strip of metallic foil suspended in front of a magnetic plate.

Condenser Microphones -Rather than a vibrating wire coil, condenser microphones have a thin diaphragm and solid back plate which make up an electronic component known as a capacitor.

SO THAT'S IT! Definition: A microphone is a device for converting acoustic power into electric power that has essentially similar wave characteristics.

In order for a microphone to work properly,
we must first make sure that we make it right!
MAGNETISM: IN
MICROPHONES! To sum it up, microphones just wouldn't
work right without magnetism, magnetic fields and everything we've learned about current, electrical and magnetic electricity.
Did you ever wonder, while you were having a good time in the karaoke club, how does a microphone do that?! In 1827, Sir Charles Wheatstone was the first person to coin the phrase "microphone."
In 1876, Emile Berliner invented the first microphone used as a telephone voice transmitter.

In 1878, the carbon microphone was invented by David Edward Hughes.


With the invention of the radio, new broadcasting microphones were created! THAT'S WHERE THE MAGNETISM
COMES IN... 1. To perform this task microphones use a thin membrane, known as a diaphragm, which mimics the function of the human ear.

2. When sound waves strike a microphone's diaphragm, they cause it to move within an electro-magnetic field, which creates a variance in an electrical current.

3. This signal is then transmitted to output devices, which reproduce the original sound wave and reinforce it.

4. The link between the microphone's diaphragm and the output device can be either wired or wireless. Microphone used in Alexander Graham Bell's telephone.
-Mary Bellis Microphones are for everyday use by anyone! Including... ANY QUESTIONS? (: THIS GUY... This.. Thing.. & even this
cutie! BY: AVA PHAM &
AMANDA JACKSON
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