Sloping or rising hearing loss can create contradictory pitch codes across frequency regions

Evidence

Two distinct models have been proposed to explain the perception of pitch: the place model and the temporal model. These two codes likely work in concert to produce the perception of pitch. For pure tones, the temporal model is likely the strongest for lowfrequency sounds and the place model for high-frequency sounds. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338 (#expands, via linked claim)

A hearing threshold shift, especially when of sensorineural origin, is often frequency dependent. Consequently, hearing can be, for instance, fully functional in one frequency range, have linear attenuation in another frequency range, and recruitment in a third frequency range. This poses certain challenges in the design and individual fitting of hearing instruments, as discussed later in Section 19.5. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2660 (#expands, via linked claim)

For pure sine waves, however, the sensitivity to change is markedly different and is a strong function of both amplitude and frequency. For example, at 1 kHz, the just-noticeable amplitude change varies from 3 dB at 10 dB(SPL) to 0.3 dB at 80 dB(SPL). — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 648 (#expands, via linked claim)

Categorization

• XREF: connects to: Increasing sensorineural hearing loss shifts tone perception from fine structure to envelope cues — Dijk, Pim van, Physiology, Psychoacoustics and…, 3380; Pitches outside a core audible range can be inaudible even in self-reported normal hearing; Place coding of fundamental pitch fails at high frequencies when harmonics smear together (+6 more)

Broader Connections

• Hearing loss varies independently across different frequency ranges #expands (0.85) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2660
• Pitch may be jointly coded by temporal patterns and their cochlear location #expands (0.85) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338
• Auditory sensitivity varies nonuniformly across the frequency range #expands (0.78) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 648