Frequency

Frequency

Number of waves per second, measured in Hertz (Hz).

Hertz (Hz)

Unit of frequency, representing one wave per second.

Relationship between frequency and wavelength

High frequency correlates with short wavelength; low frequency correlates with tall wavelength.

High intensity sounds

Often described as having a high volume.

Pitch

The perceived highness or lowness of a sound, determined by its frequency.

Time period

The time for one complete wave to pass a point.

Calculated time period

Time period = 1 second divided by frequency.

Oscilloscope

A machine that displays the wave shape of an electrical signal.

Example of time period

If a wave has a frequency of 2Hz, the time period is 0.5 seconds.

High pitch

High frequency sound.

Low pitch

Low frequency sound.