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What dynamic headphones are

What they are

The dynamic driver is the most common type used in headphones. This principle consists of a magnetic element attached to a thin diaphragm, which is often a paper material. The diaphragm is actuated by a voice coil, oscillating it and inducing vibrations into the air producing sound. The magnetic element in headphones are often composed of ferrite, mostly in lower-end or very cheap headphones. Stronger neodymium magnets are used in most modern headphones.

Dynamic headphones are available in every form from lightweight foldables to heavy-duty studio monitors. Also called moving coil types, they have transducers that are basically miniature loudspeakers, with diaphragms connected to a central voice coil that moves within a magnetic field generated by permanent magnets. This type can be very efficient and is easily powered from a standard headphone jack on a receiver or other component. Dynamic headphones are also very dependable and are the most common type of headphone in recording studios and the field than other types.

A headphone (also known as earphone, stereophone, headset) is a transducer that receives an electrical signal from a media player or receiver and uses speakers placed in close proximity to the ears (hence the name earphone) to convert the signal into audible sound waves.

They are normally detachable, using a jack plug. Typical products to which they are attached include the walkman, mobile phone, CD player, MP3 player, and personal computer. Some headphone units are self-contained, incorporating a radio receiver. Other headphones are cordless, using radio (e.g. analogue FM, digital bluetooth, WiFi) or infrared signals to communicate with a "base" unit.

Headphones may be used to prevent other people from hearing the sound either for privacy or to protect others. They are also used to exclude external sounds, particularly in sound recording studios and in noisy environments.

Generally headphones can be divided into two categories, closed and open. Closed headphones isolate background noise better, while open headphones offer a more "open" sound. Typically open headphones will sound better than similarly priced closed headphones.

They can also be divided into two other categories being electrostatic and dynamic. There is also rumour that there will be a ribbon headphone available soon.

Using headphones at a sufficiently high volume level causes temporary or permanent hearing impairment or deafness. Other risks arise from the reduced awareness of external sounds and some jurisdictions regulate the use of headphones while driving vehicles. Also, most European countries have imposed high penalties since 2002 on drivers not using a headset while operating a mobile phone in a car, to ensure that drivers keep their hands on the vehicle's controls.

Headphones generally use a 3.5mm "mini pin" jack