Room modes being minimum-phase means fixing the spectral bump also fixes the ringing

Evidence

Because low-frequency room resonances generally behave as minimum-phase systems individual modes can be addressed with parametric-filter equalization to reduce the magnitude of the spectral bump associated with a room resonance. If there is a bump, there will be ringing. If the bump is attenuated by equalization, or, in fact any of the alternative schemes, so is the ringing. Waterfall diagrams and impulse responses routinely confirm the improvements in time-domain behavior. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1640

Categorization

• DEFINE: Stakes out the minimum-phase property of low-frequency room resonances, the key theoretical justification for why equalization reduces both magnitude bump and time-domain ringing.