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What is sound ?
Sound is a form of energy that produces the sensation of hearing in our ears is called sound
Sound can travel in a vacuum true or false ?
False
Sound is produced when a body ________________________
Vibrates
What is frequency ?
The number of times a body vibrates is called frequency
Why do we cup our hands when we call our friend's name ?
We cup our hands while calling our friend's name as the sound waves do not spread in all directions and travel in one direction
We can distinguish a shrill sound from a flat surface by its __________________
Pitch
We can hear sounds from which frequency___________________________
500 Hz
Name the sounds produced by different musical instruments through part vibration ?
Stringed Instruments , Percussion or membrane instruments , Wind instruments and Reed Instruments
Sound travels faster in ________________
Solids
What is echo ?
An echo can be defined as the sound that is heard by an observer after it is reflected from a rigid surface
How does the sound produced by a vibrating object in a medium reach your ear ?
When an object vibrates the surrounding particles also vibrate . These particles are adjacent to the vibrating particle forced to vibrate
Define One Hertz ?
One Hertz is defined as one vibration per second
Suppose if you and your friend are on the moon . Will you able to hear the sound produced by your friend ?
No , you will not be able to as the moon has no atmosphere , Therefore sound waves cannot travel so we cannot hear the sound
Guess which sound has a higher pitch a guitar or a car horn ? Give reason for your answer
a car horn has a higher pitch than a guitar because sound produced by the former is more shriller than the latter
What is the audible range of an average human ear ?
An average human ear has 20Hz to 20,0000 Hz
Which organ helps to produce sound ?
Larynx or Voice box
