Conductive hearing loss shifts tuning curves upward without degrading frequency resolution.

Evidence

Pathological earS show tuning curves that may differ from those produced by normally hearing subjects. To make this comparison possible, the tuning curve of normally hearing subjects is also indicated in the data of listeners with pathological hearing. The first example is of a group with conductive hearing loss (Fig. 16.22). It can be clearly seen, by comparing the tuning curves of normally hearing suhjects with those produced by listeners with conductive hearing loss, that in the latter case the whole tuning curve is shifted upwards by ahout 30 dB. These 30 dB correspond to the hearing loss. This means that although there exists a hearing loss of 30 dB, the frequency resolution outlined in the psychoacoustical tuning curve does not change for the group with conductive hearing loss. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1884

It can be clearly seen, by comparing the tuning curves of normally hearing suhjects with those produced by listeners with conductive hearing loss, that in the latter case the whole tuning curve is shifted upwards by ahout 30 dB. These 30 dB correspond to the hearing loss. This means that although there exists a hearing loss of 30 dB, the frequency resolution outlined in the psychoacoustical tuning curve does not change for the group with conductive hearing loss. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1884

Categorization

• XREF: Connects to the distinction between conductive vs. sensorineural hearing loss and how cochlear mechanics vs. middle-ear transmission affect frequency analysis. — connects to: Wider peripheral tuning from hearing loss suppresses low-frequency fluctuation amplitude; Gap detection and amplitude modulation remain intact in sensorineural hearing loss; Hearing loss reduces cochlear suppression and compressive nonlinearity together — Dijk, Pim van, Physiology, Psychoacoustics and…, 3878 (+6 more)
• DEFINE: Distinguishes conductive from sensorineural hearing loss: conductive loss preserves frequency selectivity, which points to where filtering occurs.
• corroborated: 3 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1884

Broader Connections

• Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers #expands (0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871
• Hearing loss reduces cochlear suppression and compressive nonlinearity together #expands (0.82) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3878
• Wider peripheral tuning from hearing loss suppresses low-frequency fluctuation amplitude #expands (0.80)
• Uncertainty principles force mechanical frequency sorting in the ear to be coarse. #qualifies (0.75)
• Conductive and cochlear losses produce different loudness growth patterns #expands (0.72)
• Gap detection and amplitude modulation remain intact in sensorineural hearing loss #corroborates (0.70)