Frequency-response peaks prove time-domain ringing in minimum-phase devices

Evidence

Here we introduce electronic manipulation of a physical acoustical phenomenon. It is possible because low-frequency room resonances behave as minimum-phase systems, and therefore respond to corrective equalization of the frequency response peak by attenuating the time-domain ringing. To be clear, this does not eliminate the resonance when there is no equalized audio signal present. Pause the playback, have an interlude of live acoustical music and the room resonances will have their effects. However, press the “play” button and music reproduced through loudspeakers supplied with the appropriately equalized signal will be heard with the problematic room resonance(s) attenuated. This works best for one listener, where the mike is located, or possibly for a few in a row or column of listeners oriented with respect to simple axial modes. — , Toole, Floyd E - Sound reproduction-…, 942 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Narrow-band equalization causes audible ringing in the time domain; Room resonances are minimum-phase and yield to frequency equalization — , Toole, Floyd E - Sound reproduction-…, 942; Narrow-band filters smear signal onset despite resolving harmonics (+1 more)

Related

• Room resonances are minimum-phase and yield to frequency equalization (similarity 0.90)
• Parametric equalization of minimum-phase resonances also reduces time-domain ringing (similarity 0.89)
• Room modes being minimum-phase means fixing the spectral bump also fixes the ringing (similarity 0.89)
• Minimum-phase reasoning lets frequency responses alone reveal room resonance behavior. (similarity 0.85)
• Modal decay times below 80 Hz are achievable with parametric equalization (similarity 0.85)
• Listeners cannot hear modal ringing below about 100 Hz once amplitude is equalized (similarity 0.83)
• Room reflections cannot be corrected by electronic equalization (similarity 0.83)
• A neutral loudspeaker can emulate many colored loudspeakers via equalization because woofers are minimum-phase (similarity 0.83)
• High-frequency-resolution waterfalls falsely suggest uncontrolled ringing (similarity 0.82)
• Equalization and mode cancellation both reduce bass resonance ringing despite different mechanisms (similarity 0.81)
• Reverberation masks high-Q ringing but amplifies low-Q resonances (similarity 0.81)
• Minimum-phase loudspeaker resonances are correctable with parametric equalization. (similarity 0.80)
• Equalization only corrects sound at the measured position, not the physical resonance (similarity 0.80)
• Lower Q spreads resonances wider in frequency but shortens time-domain ringing (similarity 0.80)
• Acoustical interference is non-minimum-phase but less audible than resonances. (similarity 0.80)

Broader Connections

• Narrow-band equalization causes audible ringing in the time domain #expands (0.85)
• Room resonances are minimum-phase and yield to frequency equalization #corroborates (0.80) — , Toole, Floyd E - Sound reproduction-…, 942
• Narrow-band filters smear signal onset despite resolving harmonics #exemplifies (0.80)