Sound

1. SOUND

2. Oscillation:
movement back and
forth in a regular
rhythm.
Time period:
The time taken to
complete one vibration

3. Frequency:
Total no. of vibration produced
by a vibrating bodies in
one second.
Amplitude:
the measure of the
height of the wave.

4. Pitch: this is the characteristics of
sound help in distinguishing sharp and
dull sound
Bass: Low frequency Or pitch

5. Shrill:
High frequency or pitch

6. Loudness:If the amplitude of
the sound wave is large, then
the sound is said to be loud.

7. Quality : that feature that
distinguishes the two sounds of equal
loudness and equal pitch.

10. Inaudible sound :
1)Infrasonic sound
2)Ultrasonic sound

14. What is an Aerophone?
Any musical instrument that
produces sound by causing
air to vibrate without the
use of strings or membranes.

15. Chordophone or
string instrument :
any of a class of
musical instruments
in which a stretched,
vibrating string
produces the sound.

16. Membranophones:
Membranophone is any
musical instrument
which produces sound
primarily by way of a
vibrating stretched
membrane.

17. Idiophones :The
body of the
instrument can be
vibrated by
strike,pluck ,rub or
blow.
Xylophone

18. Electrophones: A
device which produces
sound by electrical action or
with the help of electronic
components is called
electrophones.

19. Reflection of
Sound – The
bouncing back
of the sound
wave on striking
a surface such as
a wall, metal
sheet, etc. Is
called the
reflection of the
sound wave.

20. Following are the laws of reflection of
sound:
1) The angle of reflection is always equal to the
angle of incidence.