You can't determine the wavelength of a sound wave just from its frequency. Here's why:

* Wavelength and frequency are related, but also depend on the medium: The relationship between wavelength (λ), frequency (f), and the speed of sound (v) is given by: λ = v/f

* Speed of sound varies: The speed of sound changes depending on the medium it travels through. For example, sound travels faster in solids than in liquids, and faster in liquids than in gases.

To find the wavelength, you need the speed of sound in the medium the wave is traveling through.

Here's how to do it:

1. Identify the medium: Is the sound traveling through air, water, steel, etc.?

2. Look up the speed of sound in that medium: You can find this information online or in a physics textbook.

3. Use the formula: λ = v/f

Example:

Let's say the sound is traveling through air at room temperature (approximately 343 m/s).

* Frequency (f) = 42800 Hz

* Speed of sound (v) = 343 m/s

Then, the wavelength (λ) would be:

λ = 343 m/s / 42800 Hz = 0.008 m or 8 mm