20KHz Ultrasonic transducer 25KHZ FanYingSonic transducer 28KHZ 40KHZ 60KHZ 68KHZ 80KHZ 100KHZ 120KHZ 132KHZ 200KHZ

Ultrasound is typically emitted using a piezoelectric transducer. A piezoelectric transducer is a device that converts electrical energy into mechanical energy and vice versa. When an electrical signal is applied to the transducer,it causes the piezoelectric material within the transducer to vibrate at a very high frequency,typically in the ultrasonic range. This vibration generates sound waves,which can be used for a variety of purposes,such as imaging,distance sensing,and cleaning.

In medical ultrasound imaging,a piezoelectric transducer is used to emit sound waves into the body,which then bounce off of internal structures and return to the transducer. By analyzing the echoes of these sound waves,an image of the internal structures can be created.

In industrial applications,ultrasound is often used for cleaning and distance sensing. For cleaning,high-frequency sound waves are emitted into a cleaning solution,creating microscopic bubbles that implode and create a scrubbing effect. For distance sensing， ultrasonic waves are emitted and their reflection off of objects is used to determine their distance from the sensor.

In all of these applications,the key to emitting ultrasound is the piezoelectric transducer,which converts electrical energy into mechanical energy and generates high-frequency sound waves.