Question

Check POINT 3 -
Fill in the blanks.
1. The number of vibrations completed in one
second is known as
2. The S.I. unit to measure
vibration is a second.
3. The audible range of frequencies for human ear
is
- to
4. Frequencies below 20 Hz are known as
of a
5. Pleasant and refreshing sounds are known as
1
6. Sounds of city traffic and factory machinery are
a source of
5​

Answer 1

Answer:

answer 1. oscillation

5. soft sounds