Measuring stimulus-frequency otoacoustic emissions using swept tones

Kalluri, Radha; Shera, Christopher A.

doi:10.1121/1.4807505

Cited by 58 publications

(60 citation statements)

References 25 publications

(40 reference statements)

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“…Their data were analyzed using the LSF model using a single sinusoidal tone in noise. A LSF approach was used to estimate the emission amplitude and phase in a set of windowed buffers from swept-tone DPOAE (Long et al, 2008) and SFOAE (Kalluri and Shera, 2013) recordings. The method used in the present study to extract a chirp TEOAE by transforming it into an equivalent-click TEOAE differs from the LSF method, but both share the goal of extracting a single OAE component.…”

Section: Discussionmentioning

confidence: 99%

“…At low to moderate stimulus energies for frequencies in the range of 1-2.5 kHz in human ears, CEOAEs and discrete-tone SFOAEs were nearly equivalent in terms of their generation mechanism on the basilar membrane (BM) (Kalluri and Shera, 2007). Using a double-evoked procedure for swepttone SFOAE measurements, Kalluri and Shera (2013) reported close agreement between discrete-tone and swept tone SFOAEs in four adult ears up to 8.5 kHz.…”

Section: Introductionmentioning

confidence: 88%

“…This condition was not satisfied in other studies measuring swept-tone SFOAEs. For example, the sweep rates used in Kalluri and Shera (2013) varied in the range from 2-16 Hz/ms, so that a 4 ms interval within the swept tone would include a maximum frequency range of 64 Hz, which is less than 1 ERB. To the extent that any chirp and click TEOAE differences are apparent in the experimental results, the use of fast chirp sweep rates may serve as a probe of the underlying cochlear mechanics.…”

Section: A Theoretical Perspectivesmentioning

confidence: 99%

See 2 more Smart Citations

Comparisons of transient evoked otoacoustic emissions using chirp and click stimuli

Keefe

Feeney

Hunter

et al. 2016

The Journal of the Acoustical Society of America

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Transient-evoked otoacoustic emission (TEOAE) responses (0.7-8 kHz) were measured in normalhearing adult ears using click stimuli and chirps whose local frequency increased or decreased linearly with time over the stimulus duration. Chirp stimuli were created by allpass filtering a click with relatively constant incident pressure level over frequency. Chirp TEOAEs were analyzed as a nonlinear residual signal by inverse allpass filtering each chirp response into an equivalent click response. Multi-window spectral and temporal averaging reduced noise levels compared to a single-window average. Mean TEOAE levels using click and chirp stimuli were similar with respect to their standard errors in adult ears. TEOAE group delay, group spread, instantaneous frequency, and instantaneous bandwidth were similar overall for chirp and click conditions, except for small differences showing nonlinear interactions differing across stimulus conditions. These results support the theory of a similar generation mechanism on the basilar membrane for both click and chirp conditions based on coherent reflection within the tonotopic region. TEOAE temporal fine structure was invariant across changes in stimulus level, which is analogous to the intensity invariance of click-evoked basilar-membrane displacement data.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

Section: A Theoretical Perspectivesmentioning

confidence: 99%

See 1 more Smart Citation

Comparisons of transient evoked otoacoustic emissions using chirp and click stimuli

Keefe

Feeney

Hunter

et al. 2016

The Journal of the Acoustical Society of America

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“…In the present study, cochlear mechanics were examined by measuring swept-tone OAEs (e.g., Choi et al 2008;Bennett and Ozdamar 2010;Kalluri and Shera 2013). The origin and properties of swept-tone OAEs are considered to be the same as those of CEOAEs, which were examined in the earlier study (Otsuka et al 2014).…”

Section: Introductionmentioning

confidence: 90%

Relation Between Cochlear Mechanics and Performance of Temporal Fine Structure-Based Tasks

Otsuka

Furukawa

Yamagishi

et al. 2016

JARO

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This study examined whether the mechanical characteristics of the cochlea could influence individual variation in the ability to use temporal fine structure (TFS) information. Cochlear mechanical functioning was evaluated by swept-tone evoked otoacoustic emissions (OAEs), which are thought to comprise linear reflection by micromechanical impedance perturbations, such as spatial variations in the number or geometry of outer hair cells, on the basilar membrane (BM). Low-rate (2 Hz) frequency modulation detection limens (FMDLs) were measured for carrier frequency of 1000 Hz and interaural phase difference (IPD) thresholds as indices of TFS sensitivity and highrate (16 Hz) FMDLs and amplitude modulation detection limens (AMDLs) as indices of sensitivity to non-TFS cues. Significant correlations were found among low-rate FMDLs, low-rate AMDLs, and IPD thresholds (R = 0.47-0.59). A principal component analysis was used to show a common factor that could account for 81.1, 74.1, and 62.9 % of the variance in low-rate FMDLs, low-rate AMDLs, and IPD thresholds, respectively. An OAE feature, specifically a characteristic dip around 2-2.5 kHz in OAE spectra, showed a significant correlation with the common factor (R = 0.54). High-rate FMDLs and AMDLs were correlated with each other (R = 0.56) but not with the other measures. The results can be interpreted as indicating that (1) the low-rate AMDLs, as well as the IPD thresholds and low-rate FMDLs, depend on the use of TFS information coded in neural phase locking and (2) the use of TFS information is influenced by a particular aspect of cochlear mechanics, such as mechanical irregularity along the BM.

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“…This filtering was done to mimic the high-amplitude frequency fine structure Choi et al found in human SFOAEs using swept-tones and analyzed by a digital heterodyne method. However, Kalluri and Shera (2013), in a more comprehensive study using swept tones, did not find such a SFOAE fine structure. Furthermore, Kalluri and Shera's analysis showed that a fine structure can be artificially produced by using a frequency analysis window that is too short.…”

Section: Interpreting Proposed Evidence For Sfoae Components With a Fmentioning

confidence: 83%

Stimulus Frequency Otoacoustic Emission Delays and Generating Mechanisms in Guinea Pigs, Chinchillas, and Simulations

Berezina-Greene

Guinan

2015

JARO

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According to coherent reflection theory (CRT), stimulus frequency otoacoustic emissions (SFOAEs) arise from cochlear irregularities coherently reflecting energy from basilar membrane motion within the traveling-wave peak. This reflected energy arrives in the ear canal predominantly with a single delay at each frequency. However, data from humans and animals indicate that (1) SFOAEs can have multiple delay components, (2) low-frequency SFOAE delays are too short to be accounted for by CRT, and (3) "SFOAEs" obtained with a 2nd ("suppressor") tone ≥2 octaves above the probe tone have been interpreted as arising from the area basal to the region of cochlear amplification. To explore these issues, we collected SFOAEs by the suppression method in guinea pigs and time-frequency analyzed these data, simulated SFOAEs, and published chinchilla SFOAEs. Time-frequency analysis revealed that most frequencies showed only one SFOAE delay component while other frequencies had multiple components including some with short delays. We found no systematic patterns in the occurrence of multiple delay components. Using a cochlear model that had significant basilar membrane motion only in the peak region of the traveling wave, simulated SFOAEs had single and multiple delay components similar to the animal SFOAEs. This result indicates that multiple components (including ones with short delays) can originate from cochlear mechanical irregularities in the SFOAE peak region and are not necessarily indicative of SFOAE sources in regions ≥2 octaves basal of the SFOAE peak region. We conclude that SFOAEs obtained with suppressors close to the probe frequency provide information primarily about the mechanical response in the region that receives amplification, and we attribute the too-short SFOAE delays at low frequencies to distortion-source SFOAEs and coherent reflection from multiple cochlear motions. Our findings suggest that CRT needs revision to include reflections from multiple motions in the cochlear apex.

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Measuring stimulus-frequency otoacoustic emissions using swept tones

Cited by 58 publications

References 25 publications

Comparisons of transient evoked otoacoustic emissions using chirp and click stimuli

Comparisons of transient evoked otoacoustic emissions using chirp and click stimuli

Relation Between Cochlear Mechanics and Performance of Temporal Fine Structure-Based Tasks

Stimulus Frequency Otoacoustic Emission Delays and Generating Mechanisms in Guinea Pigs, Chinchillas, and Simulations

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