Targeted absorber addition flattens reverberation time variation across frequencies

Evidence

Table 6.3, Figure 6.20 and Figure 6.21 show the effect of applying the treatment, which dramatically improves the reverberation time characteristics. The reverberation time now only varies from 0.59 to 0.41 s, which is a much smaller variation than before. The peak-to-peak variation in the level of the reverberant field has also been reduced to less than 2 dB. — David Howard, Jamie Angus, coustics and Psychoacoustics, 1944

Categorization

• corroborated: 2 independent passages support this claim — David Howard, Jamie Angus, coustics and Psychoacoustics, 1944
• XREF: connects to: Halls vary reverberation time by either adding volume or adding absorption; Reverberation time depends on both surface absorption and time between reflections — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1824; Reverberation calculations often lack absorption data below 125 Hz

Broader Connections

• Reverberation calculations often lack absorption data below 125 Hz #complicates (0.75)