Missing otoacoustic emissions reveal conductive or cochlear but not retrocochlear defects

Evidence

Word recognition scores are also fairly predictable based on the audiogram for patients with sensorineural hearing loss of cochlear origin. Yet, a patient with a retrocochlear hearing loss might present with poorer than expected word recognition scores. This finding might be a result of aging, but it may also reflect retrocochlear pathology. Further evidence of retrocochlear pathology can be evident in word recognition measures as a function of the stimulus level. As with the psychometric function, there should be an increasing relationship between presentation level and word recognition scores. In some cases of retrocochlear disorder, however, word recognition decreases with increasing intensity, a phenomenon called rollover. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1757 (#responds-to, via linked claim)

Otoacoustic emissions (OAEs) are faint sounds that travel from the cochlea back through the middle ear and are measured in the external auditory canal. Since their discovery in the late 1970s by David Kemp ( 1978 ), they have been used in the clinic to evaluate the health of outer hair cells (OHC) and in research to gain scientific insight into cochlear mechanics. Behaviorally they have been shown to predict the pattern of pure-tone quiet thresholds (Long and Tubis 1988 ; Lee and Long 2012 ; Dewey and Dhar 2014 ), auditory frequency selectivity, (Baiduc et al. 2014 ), and loudness perception (Mauermann et al. 2004 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 5757 (#expands, via linked claim)

Categorization

• XREF: connects to: Otoacoustic emissions non-invasively probe outer hair cell function in humans. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3745; OAEs reveal cochlear function through sounds emitted back into the ear canal; Absence of loudness recruitment signals retrocochlear rather than cochlear pathology (+3 more)

Related

• Absence of loudness recruitment signals retrocochlear rather than cochlear pathology (similarity 0.90)
• Mild hearing loss eliminates otoacoustic emissions but not psychoacoustic efferent measures (similarity 0.88)
• Cochlear otoacoustic emissions measurably shift behavioral thresholds, selectivity, and loudness (similarity 0.88)
• Word recognition that declines with louder speech signals retrocochlear pathology. (similarity 0.87)
• Otoacoustic emissions non-invasively probe outer hair cell function in humans. (similarity 0.86)
• Otoacoustic emissions are faint sounds generated by the cochlea that predict auditory function (similarity 0.85)
• OAEs reveal cochlear function through sounds emitted back into the ear canal (similarity 0.84)
• The cochlea actively amplifies sound and emits echoes that reveal inner-ear health (similarity 0.83)
• Otoacoustic emissions objectively reveal auditory system functioning and defect location (similarity 0.83)
• Spontaneous otoacoustic emissions cluster near SFOAE fine-structure maxima but remain undetectable there. (similarity 0.80)
• Absence of recruitment in sensorineural loss signals retrocochlear pathology. (similarity 0.79)
• Loudness drives decision weights, so OAEs may predict listening-in-noise ability (similarity 0.79)
• Loud noise damage can make the cochlea spontaneously generate its own noise (similarity 0.78)
• Otoacoustic emissions originate peripherally before neural encoding begins (similarity 0.78)
• Otoacoustic emission levels predict individual decision weights in level discrimination tasks (similarity 0.78)

Broader Connections

• Mild hearing loss eliminates otoacoustic emissions but not psychoacoustic efferent measures #qualifies (0.80)
• Word recognition that declines with louder speech signals retrocochlear pathology. #responds-to (0.80) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1757
• Cochlear otoacoustic emissions measurably shift behavioral thresholds, selectivity, and loudness #expands (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5757