A tangential room mode is defined by half-wavelengths along two wall dimensions

Evidence

The mode with one half wavelength along the 3.5 m dimension and three half wavelengths along the 5 m dimension is the (1 3 0) or tangential mode, so its frequency is: The frequency of the (2 2 2) or oblique mode is: The dimensions of 2. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1987

Categorization

• DEFINE: Clarifies what distinguishes a tangential (two-dimensional) mode from axial and oblique modes.