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.
APPEARS IN
RELATED QUESTIONS
Define the 'frequency' and 'time-period' of a wave. What is the relation between the two?
Name the three characteristics of sound.
Name the characteristic which helps us distinguish between a man's voice and a woman's voice, even without seeing them.
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
Fill in the blank with suitable word :
Loudness of sound depends on .....................
Fill in the blank with suitable word :
Quality of sound depends on ........................
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
Explain how does SONAR work?
The depth of an ocean can be determined by ______.
