Bluetooth earphones achieve wireless communication with other devices through Bluetooth chips. The Bluetooth chip includes a Bluetooth wireless communication module and processor, responsible for data transmission and communication with other devices. When Bluetooth earphones receive audio signals, they decode and convert them into analog audio signals, which are then played through speakers. At the same time, Bluetooth earphones also perform noise reduction and echo cancellation on audio signals to provide clearer sound quality.

Noise cancelling Bluetooth earphones refer to Bluetooth earphones that use noise cancelling technology to reduce or eliminate environmental noise. These headphones typically achieve noise reduction through active noise cancellation (ANC) or passive noise cancellation technology, providing users with a purer and clearer audio experience.

The working principle of wireless earbuds is mainly based on Bluetooth technology. After establishing a Bluetooth connection between the earbuds and the playback device, the playback device will transmit audio signals to the earbuds through Bluetooth. The audio processing chip inside the earbuds decodes and amplifies the received audio signal, and then plays it back through the speaker. At the same time, some wireless earbuds also have microphones and noise reduction technology, which can achieve call and noise reduction functions.