Beat Frequency Calculator Formula
Understand the math behind the beat frequency calculator. Each variable explained with a worked example.
Formulas Used
Beat Frequency
beat_freq = abs(f1 - f2)Beat Period
beat_period = 1 / abs(f1 - f2)Variables
| Variable | Description | Default |
|---|---|---|
f1 | Frequency 1(Hz) | 440 |
f2 | Frequency 2(Hz) | 443 |
How It Works
Beat Frequency
When two waves of slightly different frequencies overlap, they produce a pulsating amplitude variation called beats.
Formula
f_beat = |f1 - f2|
The beat period is T_beat = 1 / f_beat. Beats are commonly used by musicians to tune instruments.
Worked Example
Two tuning forks at 440 Hz and 443 Hz played together.
f1 = 440f2 = 443
- 01f_beat = |f1 - f2|
- 02f_beat = |440 - 443|
- 03f_beat = 3 Hz
- 04T_beat = 1 / 3 = 0.333 s
Ready to run the numbers?
Open Beat Frequency Calculator