PA LoudSpeaker sensitivity and loudest pressure level

2022 10/24

Speaker unit is a kind of electrical signals between the voice and transducer, it can in a relatively small input power to convey with a louder voice, this requires that the speaker has a higher sound pressure sensitivity, sensitivity [] is essentially a conversion efficiency of, all kinds of horn speaker system due to adopting the design of the technology, selection of materials and production process and other aspects of difference, There is also a wide variation in sensitivity.

Sensitivity refers to the speaker driver unit 1 watt of electrical input, in the axis of the speaker horn to leave 1 meters from the measured the size of the sound pressure level, if two speakers, the sensitivity of 3 db to achieve the same sound pressure level difference output, need to increase the electrical input power, so high sensitivity speakers can make larger sounds. The input power capacity of the loudspeaker system is generally far greater than 1 watt (generally between 100 watts and 2000 watts), so the actual use can be input this maximum allowable electrical power, to the rated maximum power, input loudspeaker, 1 meters in the axial direction of the loudspeaker generated sound pressure level called the loudest pressure level SPLmax example, sensitivity =100dB, For a 1w/1m PA loudspeaker, if the maximum power bearing capacity is 1000W, SPLmax=100dB+30dB=130dB, 1m.