Question

Which instruments work on the basis of reflection of sound waves?

Answer 1

Reflection of sound waves:

When sound waves hit any obstacles they bounce back. This bouncing back of sound waves from the surface of solids or liquids is called a reflection of sound.

1. Reflection of sound is used to measure the distance and speed of underwater objects by analyzing the time required for bouncing. This method is known as SONAR.
2. The working of a stethoscope is also based on multiple reflection of sound waves. In a stethoscope, the sound of a heartbeat reaches the doctor's ear through multiple reflections of sound.
3. Ultrasonic waves are used to detect defects in different organs present in the human body as kidney stones and tumors.

Explanation:

Many applications are based on the reflection of sound waves. The instruments are,

1. A megaphone is used to amplify sound in a given direction, which is a portable, cone-shaped acoustic horn.
2. A stethoscope is an acoustic medical device used to analyze the sounds of the internal organs of an animal or human body.
3. SONAR system (Sound Navigation And Ranging) is used to find the distance and direction of underwater objects by acoustic means. Another name for the SONAR technique is echo ranging. It is a tool for measuring and estimating underwater object distance, direction, and speed using ultrasonic waves.
4. If there is anything in the path of the sonar's acoustic signal as it travels through the water, it is reflected back and delivers an echo to the sonar transducer. The signal strength is measured by the sonar transducer. The direction and range of the item are determined by the length of time between the transmission of the signal and its reception.