Home
Class 8
PHYSICS
What is the frequency of infra- sound an...

What is the frequency of infra- sound and ultrasound?

Text Solution

Verified by Experts

The sounds of frequencies higher than 20,000 Hz is called ultrasound. Some uses of ultrasound are :
(i) The ultrasound equipment is used for investigating and tracking many medical problems.
(ii) Since dogs can hear ultrasonic waves. So, police use high frequency whistles which dogs can hear.
Promotional Banner

Topper's Solved these Questions

  • SOUND

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS (VALUE BASED QUESTION)|3 Videos

  • SOUND

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS (SELF PRACTICE PROBLEMS)|3 Videos

  • SOUND

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS (VERY SHORT ANSWER)|5 Videos

  • LIGHT

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS (SELF PRACTICE PROBLEMS)|3 Videos

  • STARS AND THE SOLAR SYSTEM

    NAND LAL PUBLICATION|Exercise ADDITIONAL QUESTIONS (SELF PRACTICE PROBLEM )|3 Videos

Similar Questions

Explore conceptually related problems

What is the intensity of painful sound?

A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air .The train begins to move with a speed of 10ms^(-1) towards the platform. What is the frequency of the sound for an observer standing on the platform?(sound velocity in air = (330ms^(-1)) )

What are ultrasounds?

A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360 km h^-1 . What is the frequency of sound reflected by the submarine ?Take the speed of sound in water to be 1450m s^-1 .

A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360 kmh^(-1) .What is the frequency of sound reflected by the submarine? Take the speed of sound in water to be 1450 ms^(-1) .

What is the nature of the sound waves?

What is the velocity of sound on moon ?

What is the cause for production of sound ?