Frequency Variation

In an ideal world, every sound can be modeled as a simple sine wave with the following formula.

$$x = A \sin(B(t - C))$$

In this formula,

• $A$ determines the amplitude,
• $B$ determine the frequency,
• $C$ determine the phase,
• $t$ is time,
• $x$ is the position of a the vibration sensor in the microphone.