What are inaudible sounds?

Important Questions on Sound

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 4

Define infrasonic sounds.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 5

Give an example of an object producing infrasonic sound.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 6

What are ultrasonic waves?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 7

What is meant by ultrasonography?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 8

What is echocardiography?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 9

Name the three bones present in our middle ear.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 10

What are the main functions of the three bones of the middle ear?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 1

Sound whose frequency is below $20 \mathrm{Hz}$ is called _____.