Active Noise Cancellation (ANC) is a technology used to reduce unwanted ambient noise from a user's environment. It works by creating an opposite sound wave to the ambient noise, effectively cancelling it out. ANC is commonly used in headphones, earbuds and other audio equipment to help create a more pleasant listening experience.

How does the Active Noise Cancellation (ANC) feature work in TWS headsets? 

Active Noise Cancellation (ANC) works by using microphones to detect the ambient noise in your environment. The headset then produces an opposing sound wave, which is the inverted sound wave of the ambient noise. This inverted sound wave is equal in amplitude to the ambient sound, but out of phase. When the ambient sound wave and the inverted sound wave meet, they cancel each other out and create silence. The ANC signal is constantly updated to ensure it is canceling out the noise in your environment.

What is difference between Active noise cancelation (ANC) and Environmental noise cancelation (ENC) in TWS headset?

In the case of TWS (True Wireless Stereo) headsets, active noise cancellation is used to reduce background noise from the environment, while environmental noise cancellation is used to reduce unwanted noise from the headphones themselves. Thus, ANC is used to improve the listening experience, while ENC is used to improve the overall sound quality of the device.