Transducer piezoelectric and method of reduction of the frequency of resonance of a transducer

摘要

P the invention relates to the piezoelectric transducers. It relates to a transducer having the dimensions and a nodal diameter predetermined, comprising a substrate 12 'which has radial slots 22 up to at least the nodal diameter fundamental 30, so that the fundamental frequency of resonance of the piezoelectric transducer is lowered from 3 khz to 2 khz. / p & & p & application to the devices of the acoustic alarm. / p