Perceived roughness to smoothness shifts exactly at the critical bandwidth boundary

Evidence

Listeners perceive a change from “rough” to “smooth” when the frequency difference crosses the critical bandwidth. In addition, a change occurs between “rough fused” to “rough separate” as the frequency difference is increased within the critical bandwidth. — David Howard, Jamie Angus, coustics and Psychoacoustics, 951

Categorization

• DEFINE: Clarifies the two-stage perceptual taxonomy — rough-fused vs rough-separate — that critical bandwidth theory produces.
• XREF: connects to: Consonance and dissonance judgments stem from critical bandwidth mechanics — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 934