Introduction to Noise Cancelling Headphones
Noise-cancelling headphones or noise-canceling headphones are divided into two types: active noise-cancelling headphones and passive noise-canceling headphones. The biggest difference between active noise reduction headphones and passive noise reduction headphones is that active noise reduction headphones have noise reduction circuit components inside, while passive noise reduction headphones do not.
Passive noise reduction headphones only rely on physical isolation to prevent external noise from entering the ears. The noise-cancelling headphones mentioned daily are specifically referred to as active noise-cancelling headphones in most cases.
Principle of Noise Cancelling Headphone Technology
Active noise control (ANC), also called active noise reduction (active noise reduction) or noise cancellation (noise cancellation), uses the principle of sound wave interference to reduce noise by adding an anti-noise signal to the noise signal The purpose of the signal. Therefore, the active noise reduction headset has a microphone that detects external noise, and generates an interference signal opposite to the noise according to the detected noise signal, and uses sound wave interference to cancel the external noise.
1. Comprehensive noise reduction ability, low frequency (mid frequency, high frequency) noise reduction ability, wearing comfort, wearing stuffiness, earphone weight and other parameters need to be comprehensively considered before buying a noise reduction earphone.
If you travel frequently, it is recommended to buy headphones with outstanding low-frequency noise reduction capabilities. If you often work in a metal cutting workshop, it is recommended to buy a headset with outstanding high-frequency noise reduction capabilities. If your office/dormitory often has people talking loudly, it is recommended to buy a headset with outstanding mid-frequency noise reduction capabilities.
In summer, it is recommended to buy an ear type, which is cooler to wear; in winter, it is recommended to buy a head type for more warmth. If you want to use noise reduction headphones for a long time, it is recommended to buy headphones with high wearing comfort.
2. Generally speaking, headphones with excellent comprehensive noise reduction capabilities will have relatively good low-frequency/mid-frequency/high-frequency noise reduction capabilities, but not necessarily.
For example, the comprehensive noise reduction capability of JBL E65BTNC is 22.23dB, but low-frequency noise reduction The capacity is only 10.83dB, and the effect of this headset on buses and airplanes will be weak. Therefore, before purchasing, a comprehensive analysis of the noise reduction parameters of the headset is required.
3. Some noise-cancelling headset models that are close to being discontinued are not very cost-effective due to their age and low inventory. For example, Bose’s QC25 earphones have outstanding noise reduction capabilities and are especially comfortable to wear.
However, major merchants basically have no inventory. The lowest price I found on JD.com on May 20, 2020 is 1879 yuan. The price/performance ratio is really not high.
4. For head-mounted noise reduction headphones, the two companies with the strongest comprehensive noise reduction capabilities are Sony and Bose.
Sony’s strongest head-mounted noise reduction headphones (1000xm3 and 1000xm2) and Bose’s strongest head-mounted noise reduction headphones (bose700 and QC35 second generation) have little difference in noise reduction capabilities, and we may not feel much difference in daily use difference.
If you choose Sony or Bose, consider the wearing comfort of the headset, the degree of sultryness, weight and other indicators.
Representative brand introduction
Bose Company: Bose is an American technology company that is deeply involved in the field of noise reduction headphones. The noise reduction headphones produced by this company are comfortable to wear and excellent in noise reduction.
SONY: From the perspective of noise reduction capabilities, Sony’s flagship noise reduction headset products are no different from Bose, and are in the first noise reduction echelon. There are many models of noise-canceling headphones produced by Sony, which have a large market share. Bose and Sony are the two giants of noise-canceling headphones.
Apple: Although the company only launched the only noise-canceling headset product airpods pro in 2019, thanks to the strong ecosystem of Apple’s ios devices, the market share of airpods pro continues to increase, compared to Bose and SONY For the company, the latecomer advantage is very obvious, and it has the strength to challenge the two giants.
Sennheiser: German headphone manufacturer, one of the four major headphone brands in the eyes of enthusiasts. In the field of active noise reduction headphones, Sennheiser is selling noise reduction headphones such as PXC550, PXC550 II Wireless, HD4.50BTNC, HD450BT and other models.
Industry development trend
Since the birth of noise reduction headphones, more and more models have been developed, including head-mounted, in-ear, and semi-in-ear. The product line has also gradually transitioned from the original wired noise-cancelling headset to the current stage of Bluetooth wireless noise-cancelling headsets.
The development trend of Bluetooth noise-cancelling headphones is to develop towards lighter weight, better wearing comfort, stronger noise reduction ability, and longer battery life.