Wireless headset and cordless headset

Electret headphones,dre beats pro also known as a fixed electrostatic headphones diaphragm beats by dr dre pro itself is polarized or polarized material launched from the diaphragm outside the electrostatic field polarization, does not require specialized equipment to provide the polarizing voltage. Electrostatic headphones most of the characteristics of electret headphones, but the Electret will gradually depolarization, smaller volume, performance degradation, need to replace the diaphragm, its life is generally about 5-10 years.

They consist of two parts, the signal transmitter with signal reception and amplification devices headphones (usually moving coil). Connected to the transmitter and the signal source, you can also access to the former level before the transmitter to improve sound quality and adjust the tone. Wireless headset generally refers to the infrared headphone system of the transmission signal, cordless headset is a headphone system using radio waves to transmit signals. Operating frequency of the infrared headphones from a few KHz to several MHz, the effective distance of about 10 meters, the headset in the visible range; radio headset operating frequency of the VHF 130MHz-200MHz, the UHF 450 MHz - 900MHz, most cordless headphones work in the UHF can be the transmission range of up to 100 meters, you can bypass the obstacles.

Strong anti-jamming capability of the digital signal transmission, signal loss is very small, fairly low background noise, sound and D / A and A / D conversion accuracy, such as AKG's HEARO888UHF cordless headphones with a 18bit 44.1KHz conversion accuracy can be to achieve the level of CD-quality, high signal to noise ratio and dynamic.

Two or more Vice wireless / cordless headphones may interfere with each other, so choose them the best choice when there is a strong anti-interference ability of the multiple varieties of the operating frequency or professional headset brand production, cordless headphones, in the UHF interference in the VHF may be small.

Both headphones have background noise, the more high-end models have adopted the technology to reduce noise. SENNHEISER, and AKG uses digital transmission technology wireless / cordless headset products, the so-called digital transfer, transmission and transmitter built-in A / D conversion circuit, the audio analog signals into digital signals and transmitted out, headphones built-in D / A converter circuit will receive a digital signal to analog signal.
Select wireless / cordless headphones Also note that the use of battery time, generally not less than eight hours.