Five-second excerpt of the diffuse-field waveforms of stimuli CONT and IMP + CONT.
Top: diffuse-field related (L DF,H,eq) in 1/3-octave-bands for stimuli CONT and IMP + CONT. Bottom: relative difference between the previous levels normalized at 1 kHz.
Order of measurements during sessions 2 and 3. The duration of each measurement is shown in minutes.
Average hearing levels across subjects before and 80 min after the noise exposures. Continuous lines correspond to the stimulus CONT; dashed lines correspond to IMP + CONT. Errorbars show SD across subjects. Top: left ear; bottom: right ear.
(Color online) DPOAE levels of six subjects after exposure to stimuli CONT and IMP + CONT. The number and ear of the subject are shown at the top-right corner. Results from the stimulus CONT are presented first followed by results from IMP + CONT. The abscissa corresponds to the geometric mean of the primaries. Top: DPOAE levels at specific instants during the course of the experiment. Bottom: DPOAE shift as a function of time after the end of the exposure.
(Color online) Group-average DPOAE-shift from continuous and impulsive + continuous noise exposures shown as a function of the geometric mean of the primaries and the determination time after exposure.
Average pre-exposure and final DPOAE levels for the stimuli CONT (continuous lines) and IMP + CONT (dashed lines). Final levels were measured 100 min after the exposure. Errorbars show SD across subjects. The thin gray lines at the bottom correspond to the average noise levels.
DPOAE-shift comparison between the maxima and minima of the DPOAE fine-structures from stimuli CONT (top) and IMP + CONT (bottom). The abscissa corresponds to the time after the end of the exposure. Errorbars show the SD across subjects.
Acoustic parameters of the noise stimuli CONT and IMP + CONT in a 30-s interval. All the parameters are diffuse-field related values except L ear,10min, which is measured at the blocked-entrance ear canal. The crest factor is calculated as L Cpeak–L Aeq,10min. L AXX % are percentile levels.
Three-way-ANOVA analysis for the data in Fig. 8. The factors are: (1) noise stimulus—CONT/IMP + CONT; (2) location—maxima/minima; and (3) recovery interval—eight levels. .
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