The sound has a frequency of 40 m/0.4 s, or 100 Hz.
How to calculated the frequency sound?
- A wave's crest is the point at which the displacement of swaying particles is at its greatest, while a wave's trough is where it is at its least.
- The distance between the two closest peak crests or troughs is the length of the wave.
- As can be seen, two crests and two troughs are related to the same wavelength. There are 40 wavelengths if there are 40 crests and 40 troughs.
- Consequently, 40 m/0.4 s wavelengths are created in 1 second if 40 wavelengths are produced in 0.4 seconds.
- Frequency is measured in wavelengths created each second.
- As a result, the sound's frequency is 40 m/0.4 s = 100 Hz.
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