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Measures of the sound pressure level (SPL) near the eardrum were determined at discrete frequencies between 500 and 4000 Hz on 50 ears using TDH-39P and ER-3A earphones with the attenuator of an audiometer fixed at 90 dB HL. Results revealed significant differences in the measured SPL between the two earphones at all test frequencies. Results also revealed large intersubject differences in the ...

BackgroundScreening methods for ovarian cancer are urgently needed. Previously, we showed that women who develop show an increase in serum calcium and a decrease albumin (Schwartz et al, 2020, Gynecol Oncol 2020:159:264-269). These changes could be useful screening. We asked, prior to their diagnosis, with more likely positive slope albumin-adjusted (a-asc)?MethodsThis is population-based case-...

There are few systematic comparisons of Etymotic ER-3A insert earphones versus supra-aural earphones in auditory brainstem response (ABR) measurement. We compared ER-3A insert earphones and two types of supra-aural earphones (TDH-39P and TDH-49P) in a group of normal hearing adults. Acoustic analyses revealed spectral and temporal differences among earphones. Behavioral and ABR thresholds to cl...