Sound power calculation mitigates low-frequency calibration errors from woofer displacement

Evidence

Equalization had the huge advantage of allowing the listener to sit in a sensible location. Acoustically, there were advantages too. With up to a 14 dB amplitude reduction around 42 Hz, the woofers no longer had to work so hard, distortion was lower, and they could play louder. There was also much less energy everywhere in the room at 42 Hz. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1631 (#expands, via linked claim)

Categorization

• XREF: connects to: Notching a room mode reduces woofer distortion and lets louder playback — Toole, Floyd E, Sound reproduction- the acoustics and…, 1631; Practical audio devices rest on underlying acoustics principles

Related

• Notching a room mode reduces woofer distortion and lets louder playback (similarity 0.88)
• Most loudspeakers need equalization to correct low-frequency room resonances (similarity 0.83)
• Subwoofers must be equalized together, not individually, to sound right (similarity 0.82)
• Measurement axes produce low-frequency calibration errors from woofer offset and port placement (similarity 0.81)
• Automatic equalization can create resonances by filling interference dips. (similarity 0.80)
• Equalizing for a flat in-room response requires adding a high-frequency boost. (similarity 0.80)
• Anechoic-data equalization differs sharply from room calibration, which is often misused (similarity 0.80)
• Equalizing only the low-Q resonance substantially improves subjective loudspeaker ratings. (similarity 0.80)
• Intelligent equalization requires understanding a space’s direct-to-reverberant balance (similarity 0.80)
• Equalization only corrects sound at the measured position, not the physical resonance (similarity 0.80)
• A neutral loudspeaker can emulate many colored loudspeakers via equalization because woofers are minimum-phase (similarity 0.80)
• Room reflections cannot be corrected by electronic equalization (similarity 0.79)
• Sound power is a poor estimator of bass performance in real rooms. (similarity 0.79)
• Equalization masks a mode’s audibility but only for reproduced sound. (similarity 0.79)
• Room reverberant fields typically rise in bass, necessitating bandwidth-matched equalizer cuts for distant miking (similarity 0.79)

Broader Connections

• Notching a room mode reduces woofer distortion and lets louder playback #expands (0.75) — Toole, Floyd E, Sound reproduction- the acoustics and…, 1631
• Practical audio devices rest on underlying acoustics principles #exemplifies (0.72)