Different printer types differ up to threefold in perceived loudness

Evidence

Loudness is the perceptual correlate of sound level. But it is also dependent on frequency, incident angle, the duration of the signal and its temporal envelope. It is one of many psychoacoustic relationships that defy simple descriptions. Yet, one must start somewhere, and so most investigators focused on pure tones in acoustically simple circumstances, like headphone or anechoic listening. — Toole, Floyd E, Sound reproduction- the acoustics and…, 903 (#expands, via linked claim)

The loudest sounds, when presented at equal SPLs, are in the 2 to 6 kHz range. • Loudness depends on stimulus bandwidth: For bandwidths greater than a critical band, loudness increases with increasing bandwidth, a phenomenon called spectral loudness summation. A sound can be loud because of a high sound level or because it has a broad bandwidth. • Weber’s law predicts that the just detectable amount of intensity is proportional to the intensity of the sound (DI/I = k). Weber’s law holds for noise at moderate-to-high levels but not for low levels or for tones. Tones exhibit a near miss, in which DI/I or DL decreases with increasing intensity. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 868 (#expands, via linked claim)

Categorization

• XREF: connects to: Wider bandwidth increases perceived loudness at equal sound pressure — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 868; Wideband sounds are louder than narrowband sounds at equal dB SPL; Loudness depends on frequency, angle, duration, and envelope, not just level — Toole, Floyd E, Sound reproduction- the acoustics and…, 903

Broader Connections

• Loudness depends on frequency, angle, duration, and envelope, not just level #expands (0.80) — Toole, Floyd E, Sound reproduction- the acoustics and…, 903
• Wider bandwidth increases perceived loudness at equal sound pressure #expands (0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 868
• Wideband sounds are louder than narrowband sounds at equal dB SPL #expands (0.75)