Here's how to calculate the frequency of a sound wave:

Understanding the Relationship

The speed of sound, frequency, and wavelength are related by the following equation:

* Speed of sound (v) = Frequency (f) × Wavelength (λ)

Solving for Frequency

1. Speed of sound in air at room temperature: The speed of sound in air at room temperature (approximately 20°C) is about 343 meters per second (m/s).

2. Rearrange the equation to solve for frequency:

* f = v / λ

3. Plug in the values:

* f = 343 m/s / 0.686 m

4. Calculate the frequency:

* f ≈ 500 Hz

Therefore, the frequency of the sound wave is approximately 500 Hertz.