Active outer hair cell processing boosts internal response levels by up to 40 dB

Evidence

Three rows of outer hair cells and one row of inner hair cells line the length of the cochlea. The outer hair cells are responsible for enhancing the vibration on the basilar membrane, particularly at low levels, sharpening the tuning of the vibration on the basilar membrane, and compressing the range of vibration represented by the basilar membrane. These hair cells lead to the mammalian ability to hear very low level sounds, and loss of these hair cells can cause a reduction in hearing sensitivity up to about 60 dB (Sellick et al., 1982). — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 228 (#qualifies, via linked claim)

Categorization

• XREF: connects to: Outer hair cells actively amplify and sharpen frequency response without signaling the brain.; Outer hair cell loss reduces hearing sensitivity by up to 60 dB — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 228

Related

• Outer hair cell loss reduces hearing sensitivity by up to 60 dB (similarity 0.95)
• Outer hair cells sit where basilar membrane vibration is greatest (similarity 0.91)
• Outer hair cells respond better than inner hair cells to low-frequency sound (similarity 0.90)
• Noise-induced hearing loss begins with impairment of outer hair cells (similarity 0.89)
• Outer hair cells provide active frequency-selective amplification in the cochlea (similarity 0.88)
• Outer hair cell damage steepens the basilar membrane’s growth function (similarity 0.88)
• Outer hair cells actively amplify and sharpen sound before inner hair cells fire (similarity 0.88)
• Cochlear outer hair cells enable speech amid noise and reverberation (similarity 0.87)
• Outer hair cell loss is the primary driver of loudness recruitment (similarity 0.87)
• Outer hair cell damage removes cochlear compressive nonlinearity (similarity 0.87)
• Outer hair cell damage explains recruitment by disabling active cochlear gain (similarity 0.87)
• Outer haircells amplify quiet sounds only, while inner haircells respond directly to loud ones. (similarity 0.87)
• Outer hair cells actively amplify and sharpen frequency response without signaling the brain. (similarity 0.87)
• Mild hearing loss eliminates otoacoustic emissions but not psychoacoustic efferent measures (similarity 0.86)
• Severe hearing loss from inner hair cell loss reduces maximum loudness (similarity 0.86)

Broader Connections

• Outer hair cells actively amplify and sharpen frequency response without signaling the brain. #expands (0.78)
• Outer hair cell loss reduces hearing sensitivity by up to 60 dB #qualifies (0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 228