Overlapping three adjacent mode bandwidths at one frequency point dramatically reduces sound variation

Evidence

Figure 6.39 shows the effect of adding three adjacent modes together; it shows that once more than three adjacent modes are added together, the variation is considerably reduced. The way to excite adjacent modes with a single frequency is to increase their bandwidth until the three bandwidths associated with the three modes overlap a given frequency point, as shown in Figure 6.40. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2034

Categorization

• DEFINE: Establishes the operational mechanism behind critical frequency: overlapping three mode bandwidths.