Headset is according to their drive (transducer) and the type of it to wear to the classification of the way.
Moving coil type
Moving coil in-ear headphones are the most common, the most common headphones, it’s drive unit is basically a small moving coil speakers, the permanent magnetic field in the voice coil of driving and connected to the diaphragm of the vibration. Moving coil headphones for high efficiency, mostly on the headset for the output driver and reliable and durable.
Magnetic type such as
The driver of the magnetic headphones, similar to narrow the plane of the speaker, and it will be embedded in the plane of the voice coil frivolous diaphragm, like printed circuit board the same average distribution of the driving force. Magnets in the diaphragm of the focus on one or both (push-pull), diaphragm in the formation of the magnetic field vibration. Magnets diaphragm no headphones and electrostatic headset diaphragm that light, but there are also big vibration area and similar sound quality, it as moving coil headphones for high efficiency, and it is not easy to drive.
Electrostatic type
Electrostatic headphones have light and thin film vibration, the high voltage dc polarization, polarization the electricity required by ac conversion, also has a battery power supply. Diaphragm hanging on by two fixed metal plate (stator) to form the electrostatic field, when the audio signal to load the stator, electrostatic field changes, the driver diaphragm vibration. Single stator is also can drive the diaphragm, but double the stator the push-pull form less distortion. Electrostatic headset must use special amplifier will audio signals are converted to hundreds of v voltage signal and use transformer connected to the power amplifier output terminal of the electrostatic headset can also drive. Electrostatic headset expensive, not easy to drive, the reach of level is also not moving coil in-ear headphones, but its response speed and could put all sorts of tiny details of heavy, very low distortion.
In a body
In a body headphones also called fixed electrostatic headphones, it’s diaphragm is itself or by the diaphragm of the polarization of the launch of the polarization material static electric field polarization, does not need special equipment with polarization voltage. In a body of static headset most of the headset features, but in very experience gradually to polarization, need to change, its life about 5 to 10 years.
Wireless headset and cordless headset
They consist of two parts, signal emitter and with receiving signal and amplification device headset (usually moving coil type). Transmitters and signal source is linked together, also can be in the former stage before the transmitter access or headphone amplifiers to improve quality and adjust the tone.
Wireless headset generally refers to the infrared transmission signal headset system, cordless headset is refers to using radio waves of transmitting signals headset system. The working frequency of infrared headset from several KHz to a few MHz, effective distance about 10 meters, headphones to the visible range; Radio headset working frequency VHF 130 MHz to 200 MHz, UHF 450 MHz to 900 MHz, most cordless headphones work in UHF, but transmission range of 100 meters, can around obstructions. Two vice or more wireless/cordless headset deputy may be disturbed each other, so choose when they had better choose to have DuoGe work of the frequency of varieties, for cordless headphones, working in UHF than in the interference on VHF may be small. The two kinds of background noise headphones are, more high-grade models have adopted the technology reduces the noise. Also note that the wireless/cordless headset battery life, generally should not be less than 8 hours.
