Tangential modes require half-wavelength fits in two dimensions

Evidence

There is also an infinite number of tangential modes, but they must fit an integral number of half wavelengths in two dimensions. This has the interesting consequence FIGURE 6. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1965

Categorization

• QUESTION: The passage truncates at ‘consequence’ — worth chasing what the interesting consequence actually is for mode count and room behavior.
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1965