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Sensitivity is the volume level the headset can emit when inputting 1 milliwatt of strength. So you will see that the unit of susceptibility is dB/mW (decibel/milliwatt). The higher the sensitivity of the earphones, the more quantity you can carry.

The impedance of the earphone is the impedance to the alternating current, and the unit is ordinary ohms. The lower the impedance, Custom Headphones，the more prone to noise and generation the earphones are.

Just because strength is generally inversely proportional to resistance, sensitivity and impedance levels in earbuds can also be inversely proportional. So, in principle, once the other coefficients of the headphones are similar, you should choose headphones with rich perception and reduced impedance.

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