Usually, noise reduction headphones are technically divided into two major categories: passive noise reduction and active noise reduction.
Active Noise reduction
The working principle is to collect the external environmental noise through the microphone, and then change the system into a reverse phase sound wave to the horn end. Sound pickup (monitoring the environmental noise) processing chip (analyzing the noise curve) the speaker (generating the response sound wave) to complete the noise reduction. Active noise-cancel ling headsets have noise-cancel ling circuits to counteract external noise, and most of them are lager head-mounted design. The outer noise can be blocked by the structure of earplug cotton and earphone shell, conduct the first round of sound insulation.at the same time In order to have enough space to install active noise reduction circuit and power supply.
Passive noise reduction
Passive noise-cancel ling headsets mainly surround the ears to form a closed space, or use silicone earplugs and other sound insulation materials to block outside noise. Because the noise has not been processed by the noise reduction circuit chip, it can only block the high frequency noise, and the noise reduction effect is not obvious to the low frequency noise.
Noise reduction usually adopts three measures, noise reduction at the source, noise reduction in the transmission process and noise reduction at the ear, there are passive. In order to eliminate noise actively, people invented the technology of “active noise elimination”. The working principle: All sounds heard are sound waves and have a spectrum. If a sound wave can be found with the same spectrum and opposite phase (180°difference), and the noise can be completely cancelled. The key is to get the sound that cancels out the noise. In practice, the idea is to start with the noise itself, listen for it with a microphone, and then try to generate a reverse sound wave through an electronic circuit and broadcast it through a speaker.
When dealing with complex noise environment, the two microphones of “Active Noise Reduction” will pick up the in-ear noise and various external environmental noise respectively. Equipped with independent operation of intelligent HIGH-DEFINITION noise reduction processor, the two microphones can carry out high-speed calculation of different noise picked up and eliminate noise accurately.
Inbertec 805 and 815 series use ENC noise reduction technology to achieve noise reduction effect, but what is ENC noise reduction?
ENC (Environmental Noise Cancellation or Environmental noise reduction technology), Through the dual microphone array, the speech position of the caller is accurately calculated, and removes the various interference noise in the environment while protecting the target voice in the main direction. It can effectively suppress the reverse environmental noise by 99%.
Inbertec is a professional contact center headset manufacturer in China and do wholesale call center headphones. ODM and OEM services are available. Inbertec provides the most cost-effective business headset solutions.
Post time: Jul-28-2022
