Advertisements
Advertisements
Question
What name is given to sound waves of frequencies higher than 20 kHz ?
Advertisements
Solution
Ultrasonic sound is sound waves of frequencies higher than 20 kHz.
APPEARS IN
RELATED QUESTIONS
Explain how defects in a metal block can be detected using ultrasound.
Name the characteristic which helps us distinguish between a man's voice and a woman's voice, even without seeing them.
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
Write the full name of 'SONAR'.
Fill in the blank with suitable word :
Pitch of sound depends on ....................
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
Explain how does SONAR work?
