How do headphones work? They bring your favourite songs directly to your ear, but few people understand how this happens. Well, you may need to turn down the volume a tad & prepare to crank up the knowledge. Let's take a glance at how headphones work.
Cones & Coils
Headphones work like the loudspeakers on your stereo work, only on a smaller scale. Satisfied? Of coursework you are not. Here's how loudspeakers work. Sound travels in waves, & something is necessary to produce those waves. Speakers of any kind, be they loudspeakers or earbud headphones, have a cone that vibrates to produce sound waves. This cone is made out of a plastic or paper fiber. Behind the cone is a metal coil. When your headphones are plugged in to an MP3 player, an electrical signal is being sent through the wires to the metal coil. The conductivity of the metal coil causes it to generate an electromagnetic field.
How do Headphones Work: Magnets & Sound Waves
Positioned behind the coil is a permanent magnet. You have probably noticed that, in case you let a pair of earbuds dangle, they will appear to stick together. This is because of the magnets in both. When the coil is magnetized, it is either pulled or repelled by the permanent magnet. This motion creates the sound waves that our ears can pick up. New headphones that utilize wireless know-how work in the same way. Except in their case, a radio signal is being transmitted to trigger electrical impulses that vibrate the cone.
All right, now you can crank up the volume again. But not loud because you know now that headphones send sound waves straight to your eardrums, & long exposure to loud headphones may cause hearing damage. So, rock on in moderation.
Cones & Coils
Headphones work like the loudspeakers on your stereo work, only on a smaller scale. Satisfied? Of coursework you are not. Here's how loudspeakers work. Sound travels in waves, & something is necessary to produce those waves. Speakers of any kind, be they loudspeakers or earbud headphones, have a cone that vibrates to produce sound waves. This cone is made out of a plastic or paper fiber. Behind the cone is a metal coil. When your headphones are plugged in to an MP3 player, an electrical signal is being sent through the wires to the metal coil. The conductivity of the metal coil causes it to generate an electromagnetic field.
How do Headphones Work: Magnets & Sound Waves
Positioned behind the coil is a permanent magnet. You have probably noticed that, in case you let a pair of earbuds dangle, they will appear to stick together. This is because of the magnets in both. When the coil is magnetized, it is either pulled or repelled by the permanent magnet. This motion creates the sound waves that our ears can pick up. New headphones that utilize wireless know-how work in the same way. Except in their case, a radio signal is being transmitted to trigger electrical impulses that vibrate the cone.
All right, now you can crank up the volume again. But not loud because you know now that headphones send sound waves straight to your eardrums, & long exposure to loud headphones may cause hearing damage. So, rock on in moderation.
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