Larger speaker size relative to wavelength enables higher directivity

Evidence

One more important acoustic property of a loudspeaker is its directivity pattern. In an anechoic room, we are only interested in the direct radiation to the listener, but in normal spaces with wall reflections and reverberation the listener receives all these delayed signal counterparts as well. In a relatively reverberant room, it is desirable to use a loudspeaker that has some directivity; that is, it radiates more sound along the main axis than in other directions, especially at middle to high frequencies. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 474 (#responds-to, via linked claim)

Categorization

• corroborated: 3 independent passages support this claim
• XREF: connects to: Acoustic wavelength size relative to objects governs how sound interacts with them — David Howard, Jamie Angus, coustics and Psychoacoustics, 126; Radiation directivity depends on wavelength relative to source size; Higher frequencies focus sound into a narrowing forward beam (+9 more)

Broader Connections

• Reverberant rooms make loudspeaker directivity important for sound quality #responds-to (0.85) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 474