We can use this relationship to figure out the wavelength or frequency of any electromagnetic wave if we have the other measurement. Just divide the speed of . The relationship between the speed of sound, its frequency, and wavelength is the same as for all waves: The frequency of a sound wave is the same as that of the source. Therefore, the relationship between f and λ λ is inverse: The higher the frequency, the shorter the wavelength of a sound wave. . Practice Problems. The relation of wavelength to frequency is better understood under the The wavelength of a wave is inversely proportional to the frequency of the wave and is directly Below are given some problems based on Wavelength to frequency: .