Objective auditory threshold estimation using sine-wave derived responses

Hood, Linda J.; Berlín, Charles I.; Heffner, Rickye S.; Morehouse, C. Robin; Smith, Elliott; Barlow, Elizabeth K.

doi:10.1016/0378-5955(91)90097-s

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…Studies in which comparisons are made between behavioral and electrophysiological thresholds in animals indicate that the frequency vs. threshold plots are generally similar in shape with behavioral curves some 10-20-dB more sensitive, particularly at the highest frequencies (Dallos et al, 1978;Evans, 1972;Hood et al, 1991;Wiener et al, 1966). This has been confirmed in our laboratory in studies using cats (e.g., Xu et al, 1993).…”

Section: The Abr Audiogram and Hearingmentioning

confidence: 59%

“…Arrow indicates the frequency identified as the peak frequency in the power spectrum of pouch-young call, replotted as a function of age in Figure 6. A final factor-the method of extracting a signal buried in noise-may contribute to the relative insensitivity of the ABR audiogram. Hood et al (1991) described a "derived response" method that utilizes a continuous tone plus a tone burst and appears more sensitive than the conventional ABR technique used in the present study.…”

Section: The Abr Audiogram and Hearingmentioning

confidence: 99%

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Hearing, vocalization and the external ear of a marsupial, the Northern Quoll, Dasyurus hallucatus

Aitkin

Nelson

Shepherd

1994

J of Comparative Neurology

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As part of a continuing study of the development of the marsupial auditory system, auditory brainstem responses (ABR) were recorded and an ABR audiogram was constructed for five female Northern Quolls (Dasyurus hallucatus), which are nocturnal carnivores. The best frequency for hearing lies between 8 and 10 kHz, and at 50 dB SPL there is a range from about 0.5 to 40 kHz. Vocalizations of adult quolls and pouch-young were recorded with a digital audio tape recorder, and the power spectra of representative calls were compared with the ABR audiogram. The common adult vocalizations have most energy at the lower end of the hearing range, whereas frequencies that are dominant in the isolation calls of the pouch-young lie close to the best frequency of hearing. Samples of nocturnal sounds of the habitat of the quoll were also recorded and analyzed. Power spectra have peak energy at frequencies between 2 and 5 kHz, with a smaller contribution above 10 kHz. The spectrum contains relatively little power at the best frequency of hearing. Measurements of the sound pressure level at the external ear canal as a function of stimulus frequency and location in space suggest that the directional amplifying properties of the pinna will operate most effectively on sound frequencies at the upper end of the quoll's hearing range, a region that may be important in prey detection. Comparisons are made with other mammalian nocturnal carnivores and with other marsupials. We speculate that, for nocturnal carnivores, one role of the low-frequency part of the hearing range concerns the recognition of adult conspecifics, the mid-frequency range is important for the detection of pouch-young, and the upper range may be particularly concerned with prey/predator detection.

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Section: The Abr Audiogram and Hearingmentioning

confidence: 59%

Section: The Abr Audiogram and Hearingmentioning

confidence: 99%

Hearing, vocalization and the external ear of a marsupial, the Northern Quoll, Dasyurus hallucatus

Aitkin

Nelson

Shepherd

1994

J of Comparative Neurology

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“…The high sensitivity of the hearing organ is an important survival factor for most vertebrates. Behavioral measurements indicate that guinea pigs, an extensively studied species, can detect sounds at levels around 20 μPa at 16 kHz 1 - 3 . Such weak sounds will vibrate the basilar membrane and all the structures attached to it.…”

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confidence: 99%

A differentially amplified motion in the ear for near-threshold sound detection

et al. 2011

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The ear is a remarkably sensitive pressure fluctuation detector. In guinea pigs, behavioral measurements indicate a minimum detectable sound pressure of ~20 μPa at 16 kHz. Such faint sounds produce 0.1 nm basilar membrane displacements, a distance smaller than conformational transitions in ion channels. It seems that noise within the auditory system would swamp such tiny motions, making weak sounds imperceptible. Here, a new mechanism contributing to a resolution of this problem is proposed and validated through direct measurement. We hypothesize that vibration at the apical end of hair cells is enhanced compared to the commonly measured basilar membrane side. Using in vivo optical coherence tomography, we demonstrated that apical-side vibrations peak at a higher frequency, had different timing, and were enhanced compared to the basilar membrane. These effects depend nonlinearly on the stimulus level. The timing difference and enhancement are important for explaining how the noise problem is circumvented.

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“…The sound pressure level mentioned above is not corrected for the immersion of the middle ear contributing an attenuation of approximately 20-30 dB SPL. Hence the used stimulus intensity is in very close proximity to the reported behavioral thresholds in guinea pigs at this best frequency (Hood et al, 1991). Fig.…”

Section: Inner Ear Vibrationsmentioning

confidence: 70%