Wearing headphones to listen to music has become a common practice to alleviate the fatigue of a day's work. However, the engine noise of cars on the road and the roar of trains on the subway tracks have affected the user experience. For this reason, many wireless Bluetooth headphone manufacturers are now adding noise reduction chips to their headphones to reduce ambient noise. In this article, the technology of Bluetooth active noise reduction ANC chip is analyzed. What is ANC noise reduction? The principle of ANC noise reduction is to collect the noise from the surrounding environment through the microphone inside the earphones, generating opposite signals with the same frequency and amplitude as the noise. These two signals are superimposed on each other to counteract the purpose of noise reduction.
1. High integration and small size
The reason why users are enthusiastic about using Bluetooth earphones is because their design is compact and easy to carry. The structure inside wireless Bluetooth earphones mainly consists of PCB boards and small components, lithium batteries, microphones, speakers, and various chips. With the miniaturization of Bluetooth earphones, the requirements for chip integration and packaging size have increased. The noise reduction Bluetooth chip mainly consists of power management chip, Bluetooth chip, wireless communication chip, audio decoding chip, and noise reduction chip. These chips require a high degree of integration to reduce the proportion of internal space in headphones and reserve more space for other devices.
2. Low power consumption
The miniaturization of headphones makes every inch of space valuable. Due to the small internal space, headphones typically use batteries of tens of milliamperes. A solution to reduce chip power consumption in order to meet the requirements of battery life.
3. Data processing performance
With the advancement of technology, Bluetooth earphones continue to innovate, adding more functions such as noise reduction and wake-up voice assistant. The addition of new features has also improved the data processing capabilities of Bluetooth chips.