Revision of sound

04.05.2020
12:03:54
Physics course book pg no :170 to 172
Topic : seeing sounds
The important points are
1.what is the relationship between time period and frequency?
2.what is meant by high and low pitch sound?
3.difference between soft and loud
4.define terms : range of human hearing- 20Hz to 20,000 Hz
ultrasound - above 20 kHz
and infrasound -below 20 Hz
.. with figure. 12.10.
Try to revise all these..