The human ear can hear the voice frequency range of 20Hz-20KHz, headset products currently available in the market to achieve almost. However, some products may occasionally see the minimum frequency response of less than 20Hz, or greater than the maximum frequency 20KHz. Some people may say they do not care, and in any case not within the hearing, there is no need to publicize this. In fact, the frequency response range of the headset than this would be better its sound quality.