A device for the propagation of acoustic waves comprising a substrate piezo electric -

摘要

P device for the propagation of acoustic waves. / p & & p & a device comprising a substrate piezo electric - 1 has a flat face that carries two transducers 5, the transmitters and receivers of acoustic waves. / p & & p & this device is noteworthy in that the substrate is a crystal size & & y & & and that the transducers are arranged so as to spread of the acoustic waves in a direction parallel to the axis p /