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This is the oldest type of music player with no electronic parts. How do you think the music was made louder?

Important Questions on We Hear Sound

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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Sound is produced when objects vibrate. 
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear

Fill in the blank with the right word given in the brackets.

Noise is not _____ for our health. [bad/good]

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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
What is sound?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
We and all other animals can hear the same sounds.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Define sound.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear

Which of the following is a pleasant sound?

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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Why cannot the astronauts hear each other while on the moon?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
We cannot hear any sound in the dark.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
All the sounds are pleasant.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
How is sound produced?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Which of these produces unpleasant sound?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
The sound made by an airplane is:
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
How is sound made?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Loud and unpleasant sounds are called _____.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Which organ produces sound in human beings?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
What do you mean by noise?
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
The sound of the loudspeaker is a soft sound.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Which of the following vibrates in our body to produce sound? 
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
Sound is produced when something _____ fast.
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Environmental Studies>The World Around Me>We Hear Sound>What's That I Hear
We make sound with the help of our voice box.