$$\lambda = \frac{v}{f}$$

where:

* \(\lambda\) is the wavelength in meters

* \(v\) is the speed of sound in meters per second

* \(f\) is the frequency in Hertz

The speed of sound in air at room temperature is approximately 343 meters per second. So, for a sound wave with a frequency of 539.8 Hertz, the wavelength would be:

$$\lambda = \frac{343 \text{ m/s}}{539.8 \text{ Hz}} = 0.635 \text{ m}$$

Therefore, the wavelength of the sound wave is approximately 0.635 meters.