To state it exceptionally easily, your earpiece features a piece of plastic that vibrates in accordance to those signals received out of your player it is connected to. The plastic moves directly to a metal curl that is attached to the magnet, that permits the plastic to create the noise waves that play into your ear.
That is it, in truth. It seems easy enough, but I couldn’t have considered it.
Jezen Thomas at eHow.com offers a more thorough justification to us, he states this,
“Earphones consist of a speaker cone, an iron coil, a magnet and speaker cables. When earphones are plugged into a music-playing device like a stereo, electricity is sent along the speaker cables. The speaker cables feed this electrical current through the iron coil, which behaves as an electromagnet. The coil then attracts or repels the permanent magnet, depending on the electrical current sent by the music-playing device. This causes the coil to move, which subsequently pushes and pulls the speaker cone. As the speaker cone vibrates as a result of this movement, it creates sonic waves that resonate through the air and are transferred through small bones and membranes inside your ear”.
Naturally, there are different types of headphones, but fundamentally, that’s it.
Some earphones, however, do include additional features. Noise canceling headsets, as an example, can produce a tiny field of white noise round the amp itself, which acts as a bit of a vacuum and has the effect of disabling outside sound. These headsets are also better for the health of your inner ear than most other types. Sam Costello at About.com
“The noise around us can contribute to cause us to change how we listen to an iPod. If there’s a lot of noise nearby, it’s likely that we’ll turn up the iPod’s volume, thus increasing the chances of hearing loss. To cut down on, or eliminate, ambient noise, use noise-deadening or –cancelling headphones. They’re more expensive, but your ears will thank you”.
Chris Woodford, article post for ‘Explain That Stuff.com’, provides an in depth portrayal of those major contrasts between earphones and speakers. Even with essentially operating in the exact same method, you will find variants concerning the two, it appears. He says,
“The biggest difference between loudspeakers and headphones is, of course, size. A loudspeaker needs to set all the air moving in a room so you can hear the sound it’s making, but the speaker in a headphone only has to move the volume of air inside your ear canal. That’s why it can be so much smaller and more discreet”.
If, even after all this technology discuss, you are still interested in considering what’s occurring inside your headphones, the Youtube user Cayde Brown features a series of videos known as ‘Take Apart’, which will probably be of relevance. In one episode (which I’ll link HERE), Cayde takes a pair of headsets apart and reveals to us exactly how they run.