sonic sensors
The ultrasonic sensor, a.k.a. Sonic sensor, is a device which emits these high frequency sound waves and uses reflected sound waves to detect objects or measure distances. Mainly it is used to detect obstacles, determine levels or spot materials in liquids. Besides, such sensors are designed with a transmitter that sends out ultrasonic waves and a receiver which registers any echoes from objects. The time difference between sending forth these waves and their return is used to determine an object's position. Sonic sensors are a useful tool in every genre of robotics, automobile parking systems, small town automation applications and home security devices.