The editor has introduced some basic things to pay attention to when purchasing a Bluetooth headset. In this article, the editor will continue to introduce the performance factors that affect the experience of using Bluetooth headsets.

Sound quality performance: This factor includes various parameters, the frequency response of the earphone, the signal-to-noise ratio, the transient response, the dynamic range, etc. The frequency response is mainly divided into three frequency bands: low, medium and high, and each frequency band can be further subdivided. There are also The organization is divided into seven frequency bands. The audition discs often use Tsai Qin's "Ferry" and the Eagles' "Hotel California" as a test for the average coverage of the audio. According to one's own preferences, the responsiveness of the frequency band represents the limit of a headset. Level, although the curve can be adjusted through the sound effect in the later stage, but the lack of the limit response latitude itself will lead to a smaller adjustment space. The hardware factors that affect the sound quality are mainly speakers. If the same speaker manufacturer provides products such as AAC and Goertek, there will not be much difference. The main control chip and encoding format are more affected. The generator unit and loudspeaker have a diaphragm and a moving iron (small size, low power consumption, high sensitivity), and the limits of the two are different in the two directions of high and low frequency. In addition to the performance, there is also the consistency of the left and right ears, which is very important for Bluetooth headsets, and some people have different feelings on the left and right ears, which requires the manufacturer to adjust the balance through software.

Bluetooth main control chip (SOC): In addition to the Bluetooth connection, the main control chip also adds algorithm, auxiliary and other functional factors. The high-end Bluetooth earphones currently purchased, in addition to Apple H1 earphones and Huawei A1 earphones, the main market is Hengxuan BES2300 and Qualcomm's QCC5144, low-end headphones usually use Lanxun, Luoda currently mainly uses Sony headphones and copycat Apple headphones, and some Samsung headphones use Broadcom solutions.

Active noise reduction: Noise reduction has become an important selling point of Bluetooth headsets. This is an important way to create a personal quiet environment and remove the environment, so that you can concentrate more on personal affairs. The main principle is to detect external noise through the microphone and perform inverse noise cancellation. Targeted noise reduction can be performed by controlling different frequency bands, and the transparency mode of vocal mid-range cancellation can be staggered, which has better adaptability to different environments. ANC is useful for listening to music, and CVC improves call quality.

Call quality: The call quality of the Bluetooth headset, the physical microphone quality, and the software CVC noise reduction algorithm have a lot to do call effect. At the same time, the wind noise resistance is also very strong. At present, manufacturers using this type of technology, Huawei, Apple, Samsung, and Edifier have corresponding models to support. Connection delay: The connection delay will reduce the user's experience. Especially in the game, the sound and picture are different, and it is easy to make people play. At present, the largest delay is SBC related products, and the lowest is the Qualcomm aptex low-latency version. It's hard to feel the delay at 200ms.

The above are some of the factors that affect the experience of using a Bluetooth headset.