Passive SpeakerBluetooth Speaker Email:service@zeshuispeakers.com Address: ShenZhen,China
ZeShui

Zeshui is a speaker production company with more than 20 years of research and development experience. The company’s products include mature wooden speakers and wooden headphones. At the same time, the company’s research and development capabilities are very strong, and you can DIY the wooden speakers and wooden headphones you want.

Your present position: Home > News > Industry Information

Interpretation of the ANC active noise reduction function of tws Bluetooth headset

Release time: 2021-08-24    Viewers: 44

The bluetooth headset factory knows that users choose the Bluetooth headset to bear the brunt of the sound quality of the bluetooth headset, followed by other appearances, functions, etc., so the bluetooth headset factory has been debugging good sound quality products to restore the original sound as much as possible, and restore the original sound as much as possible , I have to mention the noise reduction function of Bluetooth headsets. Today, the Bluetooth headset factory will interpret the ANC active noise reduction function for everyone.

Bluetooth headset factory

Active noise reduction is a noise reduction technology, which is one of the methods used in earphones to reduce noise. The active noise reduction function is to generate a reverse sound wave equal to the external noise through the noise reduction system to neutralize the noise, thereby achieving the effect of noise reduction. Its principle is that all sounds are composed of a certain frequency spectrum. If a sound can be found, its frequency spectrum is exactly the same as the noise to be eliminated, but the phase is just opposite to completely cancel the noise.


Interpretation of the ANC active noise reduction function of tws Bluetooth headset


The three noise reduction measures commonly used to reduce noise, namely noise reduction at the sound source, noise reduction during propagation, and noise reduction at the human ear, are all passive. In order to actively eliminate noise, people invented the "active noise reduction" technology. Its principle is: all sounds are composed of a certain frequency spectrum. If you can find a sound whose frequency spectrum is exactly the same as the noise to be eliminated, but the phase is exactly opposite (a difference of 180°), the noise can be completely cancelled out. . The key is how to get the sound that cancels the noise. The actual method used is to start with the noise source itself and try to reverse the phase of the original noise through the electronic circuit. From this point of view, the technology of active noise reduction is actually "fighting poison with poison."

Noise-canceling headphones use active noise control, which is different from the passive sound insulation of general headphones. The principle is:


Interpretation of the ANC active noise reduction function of tws Bluetooth headset


1. First detect the low-frequency noise (100 ~ 1000Hz) in the environment that the ear can hear by the signal microphone placed in the earphone (currently it can reach 3000Hz)
2. Then the noise signal is transmitted to the control circuit, and the control circuit performs real-time calculations
3. The Hi-Fi speaker emits sound waves with the opposite phase and the same amplitude as the noise to cancel the noise
4. So the noise disappears and is inaudible

Active noise-canceling headphones are expensive, but they are generally effective and comfortable to wear. However, a separate battery is required, and most passive noise reduction headphones can be used without power consumption (nor active noise reduction).
The 2020 bluetooth headset factory predicts that tws bluetooth headset will be the year of active noise reduction. The year is approaching. The bluetooth headset factory has received IDs from many brands. No surprises, they are all active noise reduction designs. The 2020 bluetooth headset factory Will go further in the Bluetooth headset market with good sound quality.
Passive Speaker:Bluetooth Speaker

Previous :11 tips for buying true wireless Bluetooth headsets

Next :What is a bluetooth headset ODM

Back to list
Related Articles To View More
Product
Speakers Headphones
About Us
Company Profile Honor Company Philosophy Application
News Center
Company News Industry Information
R&D
R&D strength Technological innovation Smart manufacturing
Contact Us

ShenZhen, GuangDong Province, China

+86 13530005572

service@zeshuispeakers.com

©2021 zeshui. All rights reserved

service@zeshuispeakers.com +86 13530005572
Fill in the Message
Verification code