Noise-cancelling headphones

A noise reducing headphones noise reducing headphones or serves as hearing protection to eliminate background noise when playing usable sound. Here, the target sound can be played back at a lower volume or erträglicherer. For noise reduction, the passive damping be used by sound-absorbing materials and active noise reduction by anti-sound.

Operation

The headset takes an integrated microphone to the sound from the outside, which is then played back through a built-in amplifier with its own power supply with gegenpoligem waveform through the speakers of the headphones. The original sound is then attenuated by destructive interference. This principle works only at low frequencies in the audible range up to several 100 Hz sufficiently well. At high frequencies, the passive damping by insulation in the headphone housing is significantly more effective.

Areas of application

Noise canceling headphones are used wherever audio signals to be transmitted to the ear in areas with loud ambient noise, such as in the cockpit of an aircraft for the flight or radio for communication between the pilots on board. However, passengers in noisy vehicles using such headphones to listen to as relaxed as possible during the trip such as music. Furthermore, the noise from electrical appliances such as noise from fans, air conditioners or electric motors can also be reduced in the interior region.

The advantage of noise-reducing earphones is that both the charge on auditory perception as well as the emission of the wanted sound from the headphones into the environment can be reduced by lowering the overall sound level at the ear. Noise reducing headphones may also be used with a desired signal to noise reduction without impingement.

One disadvantage is that the headphones are instructed to power on the use of batteries, accumulators or other voltage sources. Some devices can not play a useful signals without power supply. Since the headphone as active speakers with optimized on the built-in speakers, internal amplifiers operate similarly, the original information signals can be distorted more or less heavily altered or with additional noise (eg noise).

The designs range from circumaural headphones that are particularly effective on semi-open devices to in-ear headphones.

Provider

Well-known brands reduced noise headphones are, for example, AKG Acoustics, Blaupunkt, Bose Corporation, Creative, Denon, JVC, Panasonic, Philips, Sennheiser, Sony and Vivanco. Sony had announced in early 2012 announced its intention to filter out using a new driver technology any disturbance noise in the future.

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