A speaker makes sound by rapidly vibrating a paper cone or diaphragm. There is an electromagnet attached to the diaphragm. When current flows through the coil one way it becomes a magnet . Since there is a permanent magnet behind the coil, the coil is pulled toward the magnet. When the current is shut off, the diaphragm springs back to neutral. When current flows the other way, the coil pushes away from the magnet. This cycle is repeated thousands of times in a second and creates sound that corresponds to the electrical signal that it is sent.
A dynamic microphone uses the same arrangement of a diaphragm attached to a coil near a magnet. The process is just the opposite. Instead of using electricity to make sound, sound is used to make an electrical signal that can be recorded.
Incoming sound waves push the diaphragm in and out which drives the coil towards and away from a magnet. An electrical current is created as the coil moves through the magnet's field. This current is a signal that corresponds to the sound received by the microphone.
As you can see, an electromagnetic coil is central to the operation of a speaker and a microphone. The magic of the coil is that it can act as a variable magnet, changing both in intensity and polarity. It also changes motion to electricity and electricity into motion.
They dont. They use a stationary permanent magnet, as a loudspeaker does. Ellectrostatic loudspeakers and earphones don't have any type of magnet.
The electromagnet is part of the speaker, it causes the vibrations that become sound. Without the electromagnet, there would be no sound.
the electromagnet makes the door close when a fire alarm goes off
The best way to make your droid mini headphone jack work is by taking it to an expert so that he/she can determine what is the problem with it and fix it.
Providing the headphone has a standard 3.5 mm stereo headphone plug it will work with Apple products.
A cell or other (DC) power source must, indeed, be connected to an electromagnet to make it work. It is an electromagnet. Surf the link to our friends at Wikipedia. It's a good article, and the pics are cool.
A core
the armature
it connets to the bottom of the machine
Sounds a lot like the headphone jack is broken.
yep
A headphone amplifier is a type of audio amplifier. Instead of an amplifier that's designed to push through audio signals to speakers, a headphone amplifier is designed to work with headphones. These are common in devices such as MP3 players.
because the speakers aren't working
yes. pair them. before that you might to find out the default PIN of your headphone. Switch on the headphone. Take it to the 'discoverable' mode (you will need to consult your headphone's manual for that. Usually it involves holding a volume button down for atleast 3 seconds. Switch on bluetooth on the phone and search for devices. after the headphone is detected,press ok to select it and then pair the both of them.