Waves
Beat Frequency
Frequency of amplitude modulation from two close frequencies.
Variables
fbeatHz
Beat frequency
Beats per second
In SI units: 1/s
Allowed values: 0 or more
f₁Hz
Frequency 1
First frequency
In SI units: 1/s
Allowed values: greater than 0
f₂Hz
Frequency 2
Second frequency
In SI units: 1/s
Allowed values: greater than 0
Derivation
From superposition of two waves.
Your notes
0/5000
Where this formula is listed
- Waves formulas, under Sound Waves, alongside Speed of Sound in Gas, Sound Level (Decibels), Mach Number, Shock Wave Angle (Mach Cone) and Sound Intensity Level Addition.
- In the waves list it comes after Sound Level (Decibels) and before Mach Number.
- Waves formula sheet, one of 37 formulas printed with symbol keys and SI units.
- The full formula index, grouped by category and topic.
Common questions
What is the Beat Frequency formula?
Beat Frequency is written f_beat = |f₁ − f₂|. Frequency of amplitude modulation from two close frequencies. It belongs to Waves, under Sound Waves.
What are the units in f_beat = |f₁ − f₂|?
In SI units, f_b eat is beat frequency, measured in 1/s; f₁ is frequency 1, measured in 1/s; f₂ is frequency 2, measured in 1/s.
How is the Beat Frequency formula derived?
From superposition of two waves. The result is f_beat = |f₁ − f₂|.