Advertisements
Advertisements
Question
Give two practical applications of reflection of sound waves.
Advertisements
Solution
- Megaphones or loudhailers, horns: Musical instruments such as trumpets and shehnai are all designed to send sound in a particular direction without spreading it in all directions.
- Stethoscope: A stethoscope is a medical instrument for listening to sounds produced within the body, mainly in the heart or lungs. In stethoscopes, the sound of the patient’s heartbeat reaches the doctor’s ears through multiple reflections of sound.
RELATED QUESTIONS
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Explain how defects in a metal block can be detected using ultrasound.
How does the pitch of a sound depend on frequency ?
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ?
What happens to the pitch of a sound if its frequency increases ?
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
Give one use of ultrasound in industry and one in hospitals.
Name an animal which navigates and finds food by ecolocation.
The depth of an ocean can be determined by ______.
Expand the abbreviation of the term SONAR.
