Using Piezoelectric materials such as Quartz crystals of a Transducer. That can be changed into electrical vibrations, mechanical vibration. As the waves in the desired frequency.
Use of crystalline material Piezoelectric Transducer such as Quartz , which can transform the vibrations into electrical mechanical vibration frequencies caused a surge in demand.
Use of materials such as crystal Piezoelectric Quartz is Transducer.Which can change the vibration mechanical vibration electrical aBorn as a wave in the desired frequency.