Low-frequency tones become relatively louder as level increases.

Evidence

Group averaged fitted loudness curves (Oetting et al. 2014 ) for left monaural, right monaural and binaural stimuli are shown, along with the interindividual standard deviations of loudness estimates for the stimulus intensities presented in the MRI experiment. All three curves are characterized by a nearly linear growth of categorical loudness with sound intensity between 20 and 80 dB SPL and an increase in the steepness of the slope around 90 dB SPL. There was virtually no difference in perceived loudness between left and right ear of entry. For diotic stimulation, the expected effect of binaural loudness summation is clearly visible. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2626 (#expands, via linked claim)

Categorization

• XREF: connects to: Low-level tones mask lower frequencies more than higher ones, reversing at high levels; Perceived loudness grows nearly linearly with intensity until steepening near 90 dB SPL — Dijk, Pim van, Physiology, Psychoacoustics and…, 2626; Ear frequency response varies with amplitude, especially at low frequencies. (+3 more)

Related

• Perceived loudness grows nearly linearly with intensity until steepening near 90 dB SPL (similarity 0.92)
• Loudness depends on frequency, angle, duration, and envelope, not just level (similarity 0.87)
• Loudness scales with frequency squared, requiring large amplitude at low frequencies (similarity 0.87)
• Low-frequency loudness growth compresses as level rises (similarity 0.87)
• Loudness growth is linear up to 80 dB then steepens near 90 dB (similarity 0.86)
• Raising a sound’s loudness shifts its perceived pitch except near 1-2 kHz. (similarity 0.85)
• Loudness depends on more than physical sound intensity alone (similarity 0.85)
• Auditory pathway neural activity linearly encodes perceived loudness, not sound level (similarity 0.85)
• Loudness slightly but measurably alters perceived pitch of tones (similarity 0.85)
• Loudness at high sound levels arises from excitation spreading across adjacent frequency bands (similarity 0.84)
• Distinct brain regions process sound intensity versus perceived loudness differently (similarity 0.84)
• Binaural loudness constancy is partly physical and partly cognitive in origin (similarity 0.84)
• Loudness, measured in sones, depends inherently on frequency content (similarity 0.84)
• Low-frequency sound can awaken silent inner ears to emit spontaneous tones (similarity 0.84)
• Binaural loudness exceeds monaural loudness, more so for soft than loud sounds (similarity 0.84)

Broader Connections

• Low-level tones mask lower frequencies more than higher ones, reversing at high levels #exemplifies (0.90)
• Ear frequency response varies with amplitude, especially at low frequencies. #expands (0.85)
• Perceived loudness grows nearly linearly with intensity until steepening near 90 dB SPL #expands (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2626