Calculateur de Fréquence de Battement Gratuit
Calculez la fréquence de battement entre deux sons proches. Trouvez la différence de fréquence et l'effet d'interférence.
Beat Frequency
3.00 Hz
Beat Frequency vs Frequency 1
Formule
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.
Exemple Résolu
Two tuning forks at 440 Hz and 443 Hz played together.
- 01f_beat = |f1 - f2|
- 02f_beat = |440 - 443|
- 03f_beat = 3 Hz
- 04T_beat = 1 / 3 = 0.333 s
Questions Fréquentes
How are beats used in tuning?
A musician plays a reference tone and the instrument simultaneously. As the instrument approaches the correct pitch, the beat frequency decreases toward zero.
Can you hear beats at any frequency difference?
Beats are most clearly perceived when the frequency difference is less than about 15 Hz. Above that, the pulsation becomes too rapid to distinguish.
Do beats occur with light waves?
Yes, but light frequencies are far too high to observe beats directly. Optical heterodyne detection uses the principle electronically.
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