# Wave on a string to sound wave

If you have a string of 2m in length, and the wave speed on the string is 2m/s. and when then string vibrates at fundamental frequency the wavelength of the wave would then be 4m.

However, the sound created by the vibrating string would have a speed of around 340m/s (speed of sound depending on temperature). Since the velocity increased this means either the wavelength or the frequency must change because:

$$v = \lambda f$$

My question is, would the wavelength increase, or the frequency, or both? If you can explain a bit that would be even better.