Earphone sensitivity earphone sensitivity refers to the sound pressure level that the earphone can emit when the earphone inputs 1 MW of power (the unit of sound pressure is dB. The higher the sound pressure, the greater the volume). Therefore, generally, the higher the sensitivity and the smaller the impedance, the easier the earphone is to sound and drive.
The sensitivity of the earphone is actually the sensitivity level of the earphone. It is the sound pressure level generated by the earphone coupled to the simulated ear (artificial head) when 1MW electric power is applied to the earphone. The 1MW power is calculated based on the standard impedance of the earphone at 1000Hz. The unit of sensitivity is dB / MW. Another less commonly used unit is dB / VRMs, that is, the sound pressure level generated when 1Vrms voltage is applied to the headset. High sensitivity means that the power required to reach a certain sound pressure level is small. At present, the sensitivity of dynamic headphones is generally above 90dB / MW. If headphones are selected for Walkman, the sensitivity is preferably about 100dB / MW or higher.
