Long wavelengths diffract around obstacles more than short wavelengths do

Evidence

The degree of diffraction depends on wavelength because it effectively takes a certain number of wavelengths for the edge of the wave to make the transition to shadow. Thus the amount of diffraction around an edge, such as a building or wall, will be greater at low and less at high frequencies. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 423

Categorization

• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 423