The arithmetic mean of hearing levels at five frequencies (250 Hz, 500 Hz, 1,000 Hz, 2,000 Hz, and 4.000 Hz) in the affected ear was 77.7[+ or -]23.0 dBHL
on admission and 36.4[+ or -]28.3 dB at the follow-up.
The average hearing level was 43.1 [+ or -] 17.3 dBHL
preoperatively and 39.2 [+ or -] 18.2 dBHL
The exclusion, in our study, of subjects with hearing thresholds over 50 dBHL
even at a single frequency and additionally the smaller sample size and the different clinical-demographic features of the cohorts may account for this discrepancy.
ABR test revealed that the hearing loss of patients were all above 90 dBHL
, and DPOAE were absent bilaterally from all patients.
Flatter audiogram configurations were observed at ages older than 60 years (II: 2, II: 3), whereas the audiogram of II: 2 (57 years of age) was ski-sloped, and the threshold of 250 Hz was 30-35 dBHL
, that of 500 Hz was 35-40 dBHL
, that of 1 kHz was 75 dB, and that of 2 kHz to 4 kHz was greater than 100 dBHL
(Figure 2, upper panel).
A STS in hearing is defined as a change in at least one ear noted between the test of interest and reference audiogram as either an average at 2000 Hz, 3000 Hz, and 4000 Hz of [+ or -] 10dBHL or more, or [+ or -] 15 dBHL
or more at 1000 Hz, 2000 Hz, 3000 Hz, or 4000 Hz.
Most centers agree on a target of 30 dBHL
([+ or -] 5 dB) for most audiometric frequencies, and this is achievable with current microphones and front-end processing.
Abbreviations: C&P = Compensation and Pension, CAP = central auditory processing, CAPD = central auditory processing disorder, dBHL
= decibels hearing loss, DPOAE = distortion product otoacoustic emission, IED = improvised explosive device, NSI = Neurobehavioral Symptom Inventory, OAE = otoacoustic emission, RPG = rocket-propelled grenade, SD = standard deviation, TBI = traumatic brain injury, VA = Department of Veterans Affairs, VHA = Veterans Health Administration.
The specific aim of the present study was to compare monaural performance-intensity functions of average esophageal and normal speech in quiet, and at various signal-to-noise ratios (SNR) (0, +3, +6, +9, +12 dBHL
TEOAEs can be recorded in the ear canals of normal hearing individuals but are absent in the ear canals of individuals with significant hearing loss (>30 dBHL
The PTA was 30 dBHL
for right ear and 34 dBHL
for the left ear in male cases.
(Although 10 participants may appear to be a small sample, extensive experience with experiments of this nature has shown such a sample size to be adequate.) All participants exhibited normal audiograms, with thresholds no greater than 20 dBHL
at the frequencies of 125, 250, 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz.