Ultrasonic waves are used for sound ranging.
Sound waves with frequencies higher than the upper audible limit of human hearing are called ultrasound. The limit varies from person to person but is approximately 20,000 Hertz. The physical properties of ultrasound are similar to the normal audible sound.
- Ultrasonic Waves are used as they can penetrate deep in water without losing intensity.
- Because their frequency lies beyond the limits of audibility (20Hz—20,000Hz).
- One of the application of the sound ranging is to locate the position of the object underwater and to find the depth of the sea.