The frequency response range refers to the width of the frequency band that the earphone can deliver. The excellent earphone frequency response width can reach 5Hz-40000Hz, while the human ear's hearing range is only 20Hz-20000Hz. It is worth noting that the criteria for defining the frequency response width are different, for example, 1/2 or lower than the average output amplitude, which is obviously different. The average manufacturer is to reduce the output amplitude by 1/2 to the standard measured frequency response width, which is to say -3dB as the standard, but because of the different test standards used, some products are measured at -10dB. This is actually equivalent to a standard measurement below 1/16 of the normal value. Therefore, the width of the frequency response is greatly widened. When purchasing, users should pay attention to the frequency response width of different brands of headphones may have different test standards.
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