2006-08-28 04:16:29 · 11 answers · asked by mathewstreet_03 1 in Consumer Electronics ➔ Music & Music Players
Go here http://electronics.howstuffworks.com/speaker.htm
2006-08-28 04:21:03 · answer #1 · answered by Lee 4 · 0⤊ 0⤋
As you may already know magnets have north and south poles like the earth does. Think of the north pole as having a positive charge and the south negative. You may also know the unlike magnetic fields attract and like fields repel. We use this phenomena to our advantage to produce sound.
Sound waves are just that, waves of air moving at different frequencies. You can look at it much like a wave of water, how it has a up and a down cycle, so does sound. When a speaker moves out it produces the up cycle of the wave. When it moves in it produces the down cycle. But how?
When a positive voltage is applied to the + side of the voice coil the speaker will move outward. To see this get a 1.5 volt AAA, AA, C, OR D battery and connect the positive battery terminal to + speaker etc. You will see the speaker move outward. Switch them to see it move inward.
When a voltage is applied to the coil it produces a magnetic field of its own. If that field is opposite of the magnet it will pull the cone down. if it is the same it will repel the cone away or out. The higher the voltage, the more the cone will move. If you turn it up to far the cone can get thown to hard up and lock up never to move again or the coil can over heat.
Sound is measured in decibels and cycles per second. Humans can hear from 20 cycles per second to 20,000 cycles per second. We say this 20 hertz to 20 kilohertz.
one hertz is the speaker moving out and in once.
So a 20hz bass drop will move the speaker in and out 20 times per second. It takes a big speaker to produce 20 hz and a small one for 20khz. This is why woofers are big and tweeters are small
2006-08-28 04:21:19 · answer #2 · answered by Sindebad 3 · 0⤊ 0⤋
Tiny electrical currents make the electric magnet in the center of the cone vibrate and the vibration of the cone creates the noise rather like a electric car horn but at different pitches.
2006-08-28 04:25:22 · answer #3 · answered by Barry G 2 · 0⤊ 0⤋
the audio creates a varying magnetic field in a coil. the coil is close to a static magnet. as the field arond the coil varies, it causes the coilt to be pushed further away, or closer to, the static magnet.
the coil is connected to a paper/card cone. as the cone moves it produces sound waves in the air
2006-08-28 04:21:19 · answer #4 · answered by Vinni and beer 7 · 0⤊ 0⤋
It vibrates. The vibrations shake the air at certain frequencies, and these vibrations in the air vibrate you ear drum and thus you hear the sound.
That's why sound wouldn't work in space, because it's a vacuum up there so there is no air so the vibrations don't reach your ear.
2006-08-28 04:22:32 · answer #5 · answered by StephenD 2 · 0⤊ 0⤋
I read the answers first before I answer since I don't like wasting the reader's time.
I have nothing to say on this one since Sinebad has said it all.
In fact he might like to change his name to Square Wave so perfect was his answer.
I bet he hates digital unless it comes from a synth?
2006-08-28 04:36:43 · answer #6 · answered by Anonymous · 0⤊ 0⤋
an electromagnet moves a paper cone back and forth
2006-08-28 04:25:28 · answer #7 · answered by mesun1408 6 · 0⤊ 0⤋
A "SPEEKER"? You've done it again.
2006-08-28 04:20:40 · answer #8 · answered by Anonymous · 0⤊ 1⤋
they open their mouth and sound comes out!
2006-08-28 04:27:43 · answer #9 · answered by d@dz 5 · 0⤊ 0⤋
you plug it in
then it works
2006-08-28 04:18:53 · answer #10 · answered by ? 5 · 1⤊ 0⤋