Room axial mode frequencies are set by the distance between opposing surfaces

Evidence

These modes occur between two opposing surfaces, as shown in Figure 6.31, and so are a function of the linear dimensions of the room. The frequencies of an axial mode are given by the following equation: FIGURE 6. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1954

Categorization

• DEFINE: Defines ‘axial modes’ as standing waves between two opposing surfaces, a core term for understanding room acoustics.