Beskrivelse
It was studied if the sweeping direction of the primaries f1 and f2 influences fine structure measurements of the 2f1-f2 distortion product otoacoustic emission (DPOAE). Two different methodologies named DPOAE_ASC (ascending sweep) and DPOAE5_DES (descending sweep) were implemented with the commercial system ILO96. Both methods perform fine structure measurements in the same frequency range (1.4-6kHz) with L1/L2=65/45 dB, f2/f1 = 1.22 and 0.7 seconds averaging time per primary presented. DPOAE fine structures were measured in the right ear of 14 normal hearing subjects with both methods in a balanced experiment and without refitting the sound probe. Results showed that the two methods are highly repeatable and able to detect fine structures even in subjects with low S/N. However, when DPOAE_ASC measurements are compared with DPOAE_DES, fine structures appear shifted and the level contour is altered. A minor level difference was inadvertently induced due to differences in the level calibration procedure of the two methods employed. The significance of this is currently being studied. [Work supported by the Danish Research Council for Technology and Production.]| Periode | 6 jun. 2006 |
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| Begivenhedstitel | 151st Meeting of the Acoustical Society of America |
| Begivenhedstype | Konference |
| Konferencenummer | 151 |
| Placering | Providence, Rhode Island, USAVis på kort |