Sound bends around objects small versus wavelength and reflects off large ones

Evidence

That is, sound is diffracted around objects that are small with respect to wavelength and is reflected from objects that are large with respect to wavelength. The same thing applies to loudspeakers. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2490

Categorization

• XREF: Recalls the Chapter 1 diffraction/scattering material; the diffraction-vs-reflection rule is the mechanism that governs all loudspeaker directivity.