ENC (Environment Noise Cancellation) has various implementation methods, and each has its own advantages and disadvantages in cost and performance. But their core and principle are the same: sensors (microphone, bone conduction, etc.) + noise reduction algorithm blessing. This article briefly analyzes and introduces the concepts and principles of ENC technology, while the focus is to provide solutions for the most commonly used ENC production tests. Earphone manufacturer shares with you.

ENC and ANC

The ANC (Active noise cancellation) earphone system collects environmental noise through a microphone and adds the reverse wave of this noise to the speaker's end. The human ear hears the result of the superposition of two noises with opposite phases, so the cancellation is achieved. The purpose of noise. The ANC function is to allow users to obtain a purer original signal from the headset. More details will not be repeated.

The most obvious difference between ENC and ANC is that the beneficiary of ANC is the user of the headset. Through the function of ANC, users can protect themselves from environmental noise interference; the beneficiary of ENC is the other party on the call. The impact of the call allows the other party to hear the pure voice. The former makes the listening environment quieter, and the latter makes the listening environment at the other end of the call quieter.

DSP and ANC

DSP (Digital Signal Processing) has the same principle as ANC, which is the superposition of signals with opposite phases. There are two differences: (1) Different types of aliased signals: ANC aliases sound signals, while DSP aliases digital electrical signals (2) The position of aliasing is different: ANC is in the air from the speaker to the eardrum In, the aliasing of the acoustic signal is performed, and the DSP is the aliasing of the electrical signal inside the earphone system.

CVC and ENC

CVC (Clear Voice Capture) can be understood as an algorithm or software, mainly for the echo during a call, and the beneficiary is the other end of the call. Earphones with poor echo cancellation will hear their own voice on the other end of the call. ENC is aimed at environmental noise. Although it benefits from the other end of the call, it targets different interference signals.

As a very important part of the TWS headset function, the ENC function has a decisive effect on the call effect in a complex environment. As the simplest and most versatile ENC solution, dual-mic noise reduction is widely used in various communication devices, and it will still be the mainstream choice in the next few years.

As the TWS market grows, there will undoubtedly be a large number of competing products. How to stand out from the market and become a hot product, apart from the value attached to the brand itself, depends on an excellent performance in all aspects. As a TWS earphone, the improvement brought by call noise reduction is undoubtedly very important, but it is ignored by many people. Therefore, doing this function well will become a huge competitive advantage and gain more markets.