Question

Fill in the blanks.
1) loudness of sound _____ with increase in the distance between the listener and the source .

2) the characteristic of a sound which distinguish a shrill sound from a hoarse one is called _______ .

3) a longer string will produce a sound of a _____ pitch.

4) drum produce sound due to vibration of its ________ .

5) unpleasant sound that is very loud is called _______ .

6) human can pick up sound in the range of ______ to dash _______ .

7) sound of about ______ decibels or more causes many health hazard .

8) constant exposure to sound above 80 dB can cause ______ .​

Answer 1

Answer:

1.Loudness of a sound is measured with increased distance between the listener and the source

2.The characteristic of sound which distinguishes between a sharp sound and dull sound is called pitch.

3. A longer string will produce a sound of a Low pitch.

4.drum makes sound due to the vibrations of the material stretched across its hollow body.

5.unpleasant sound that is very loud is called a cacophony.

6.human can pick up sound in the range of 20 Hz to 20 kHz.

7.Sound of about 70 dB decibels or more causes many health hazard

8.Constant exposure to sound above 80 dB can cause Ear Damage.

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