What can change with distance is the wave's amplitude, which is the measure of its strength or intensity. In general, the amplitude of a wave decreases as it moves away from its source due to energy dissipation or spreading out over a larger area. This phenomenon is often referred to as wave attenuation or wave decay.
While the frequency stays the same, other characteristics of the wave, such as its wavelength and velocity, may change if the wave is affected by factors like dispersion or non-uniform media. However, these changes do not directly alter the wave's fundamental frequency.
