Hearing impairment disrupts both place and temporal pitch codes

Evidence

We know that listeners with SNHL have disruptions to the place code, particularly in the form of reduced frequency selectivity. Consequently, to the extent that the place code is responsible for the pitch of sounds, disruptions to pitch perception are expected. Further, we can measure the amount of disruption to the place code in listeners with hearing loss, using our tools to measure frequency selectivity. Broadening of frequency selectivity would impact the ability of listeners with hearing loss to select resolved harmonic peaks, thereby impacting pitch perception. Psychophysical experiments also have demonstrated disruption to the temporal code in listeners with hearing loss (Hopkins & Moore, 2011), suggesting that hearing impairment may alter both the place and temporal codes for pitch. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1326

Categorization

• QUESTION: Worth chasing: the Hopkins & Moore (2011) study showing temporal-code disruption in hearing loss — what exactly did it measure?
• corroborated: 3 independent passages support this claim — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1326
• XREF: connects to: Hearing-impaired listeners fail to gain temporal resolution in background noise — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1933; Impaired temporal resolution degrades fine-structure pitch processing more than reduced frequency selectivity does — Dijk, Pim van, Physiology, Psychoacoustics and…, 3377; Temporal envelope suffices for speech while fine structure carries pitch information — Dijk, Pim van, Physiology, Psychoacoustics and…, 3381 (+9 more)

Broader Connections

• Sloping or rising hearing loss can create contradictory pitch codes across frequency regions #expands (0.85)
• Sensorineural hearing loss damages pitch, harming speech-in-noise communication #expands (0.80) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1324
• Pitch perception is encoded by the timing of neural firing in the cochlea #corroborates (0.75) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1655