Frequency refers to the number of complete back-and-forth vibrations of a medium per unit of time. It is measured in Hertz, with one Hertz equaling one vibration per second. All particles in a vibrating medium oscillate at the same frequency, transferring sound waves that are detected by the ear at that frequency. Frequency can also refer to the number of compressions or rarefactions that pass a given point per unit of time in a sound wave.

1. Frequency
by: LIBRA

2. 
“How often” the particles of the
medium vibrate when it passes a
medium.
It is the number of complete back-and-
forth vibrations of a particle per unit of
time.
Frequency

3. 
Unit: Hertz (Hz)
where: 1 Hertz= 1 vibration/second
Frequency

4. 
Each particle of the medium vibrates at
the same frequency.
This is sensible since each particle
vibrates due to the motion of its nearest
neighbour.
Frequency

5. o Subsequently, a
guitar string
vibrating at 500 Hz
will set the air
particles in the room
vibrating at the same
frequency of 500 Hz,
which carries a
sound signal to the
ear of a listener,
which is detected as a
500 Hz sound wave.

6. 
Frequency
 Also refers to the number of
compressions (high pressure) or
rarefactions (low pressure) that pass a
given point per unit of time.
A detector could be used to detect the
frequency of these pressure oscillations
over a given period of time.

7. 

8. 
The frequency is simply the reciprocal
of the period.
A sound wave with a high frequency
would correspond to a pressure time
plot with a small period while sound
wave with low frequency would
correspond to a pressure time plot with
a large period
Frequency

9. 