Question

II. Fill in the Blanks
Fill in the blanks with suitable word/s.
1. human beings sound is produced by __________.
2. Sound of frequency lower than 20 Hz is called the __________.
3. The __________ nerve is also present in the inner ear.
4. Sounds which are unpleasant to the ear is called __________.
5. Too much noise in our surroundings that causes discomfort is called __________.
6. The speed of sound is maximum in __________.
7. Sounds of frequencies higher than 20,000 Hz are called the __________ sound.
8. __________ is the time taken by a vibrating body for one complete vibration.
9. Above __________ the noise becomes physically painful.
10. Plantation on the roadside can reduce __________.
11. The hearing range of human ears is __________.
12. The loudness of normal breathing of human is __________.
13. Vibration is a repeated __________ and __________ motion.
14. The loudness of sound is determined by the __________ of vibration.
15. The human voice box is called __________.

Answer 1

Answer:

Explanation:

1 voice box or larynx

2 infrasonic sound

3 cochlear nerve

4 cacophony

5 hyperacusis

6 solids or solid medium

7 ultrasonic sounds

8 frequency

9 80 decibels

10 soil erosion

11 20HZ to 20KHZ

12 vesicular breathing

13 back and forth

14 amplitude

15 larynx

Answer 2

1.voice box
2. Infrasonic sound
3.Cochlear nerve
4.hyperacusis
5.solids
6. Ultrasonic sound