Today, Bluetooth headset manufacturers recommend an ANC active noise reduction headset that will be available soon. Because of the protection of the appearance from being copied, the picture of the headset will not be released today. Only from the two aspects of ANC active noise reduction and effect, you can contact the Bluetooth headset manufacturer for details.
ANC active noise reduction technology: it refers to the technology of collecting environmental noise and generating the signal which is opposite to the noise and playing back with earphone and other devices to offset the noise. The algorithm is based on the superposition and cancellation of the inverse signal and the original signal with the phase difference of 180 degrees. The mainstream ANC noise reduction schemes are divided into feedforward, feedback and hybrid active noise reduction.
ANC active noise reduction headset
The logic of ANC active noise reduction is: pickup (monitoring environmental noise) → processing chip (analyzing noise curve) → loudspeaker (generating echo sound wave) → completing the process of noise reduction synthesis.
Noise reduction effect 26dB
The noise reduction effect is expressed in terms of noise reduction amplitude and noise reduction depth. DB is a ratio, a numerical value and a pure counting method without any unit indication. According to the national regulations, the noise standard of residential areas is below 50 dB during the day and below 40 dB at night. The ANC active noise reduction earphone produced by Bluetooth headset manufacturer can achieve 26 DB noise reduction effect, while the noise emission value at night is 40 dB
Another set of data can help you understand the concept of 26dB. 10dB is about when people can feel the sound. Generally speaking, when the self voice is about 30dB, it will not affect normal life and rest. When it reaches 50dB or more, people will have a greater feeling and it is difficult to fall asleep. 10-20db is very quiet and can hardly be felt; 20-40db is equivalent to talking quietly; 40-60db is equivalent to ordinary indoor conversation; 60-70db is equivalent to shouting and damaging nerve; 70-90db is noisy, and long-term learning and living in this environment will gradually damage human nerve cells; 90-100db can cause hearing loss; 100-120db is intolerable, which can be temporary in a few minutes Deafness.
Combined with the ANC active noise reduction principle and 26dB noise reduction effect, it is not difficult to judge the quality and level of the ANC active noise reduction headset to be launched by the Bluetooth headset manufacturer. Because of the appearance protection, the Bluetooth headset is recommended not to publish the headset pictures for the time being. With the development of the product development, the Bluetooth headset manufacturers continue to disclose more relevant parameters and pictures of ANC active noise reduction earphone. I hope you can have a look Officials continue to pay attention to it.