The ears were infection free in 44 cases (91.7%) and single perforation was commonest observation (45, 93.8%), that is in accordance with result of Wani who found single perforation in tympanic membrane in 92.3% patients while multiple perforations were found in 7.7% patients.4 Similarly in Park study the commonest finding was single perforation in TM.7 Majority of patients consulted ENT OPD after receiving trauma to ear except in cases where trauma was not resulting into any significant symptom or patient belonged to a far flung area On performing pure tone
audiometry conductive hearing loss was the most common finding (38, 79.2%), while mild degree hearing loss was commonest (24, 50%) finding.
The 2 pure tone
audiograms prior to the acute acoustic trauma, showed normal, symmetrical hearing bilaterally.
audiometry was carried out in a sound treated room for the estimation of hearing threshold using a double channel GSI clinical audiometer.
Caption: Figure 4: Pure Tone
Audiometry recorded one, 14, and 60 days after onset of sudden hearing loss in the left ear (second episode).
Key Words: Hearing loss, Pure tone
audiometry, Hearing protection devices, Ear Muffs, Ear Plugs
Patients were excluded when they did not complete one of such procedures, as well as those that showed hearing loss with conductive components, setting aside the sensorineural presbycusis diagnosis in the average threshold pure tone
A hearing test was done by conventional pure tone
audiometry in a soundproof booth by two audiologists from the Department of Clinical Physiology.
thresholds in multiple sclerosis: A further study.
The pure-tone threshold was determined using a GSI 61 diagnostic pure tone
audiometer (Grason-Stadler, Eden Prarie, MN, USA).
When struck, the lithophone emits a pure tone
, like a bar on a xylophone.
"This discovery indicates that pure tone
communication was already exploited by animals in the middle Jurassic, some 165 million years ago," Professor Robert said.
There was no statistically significant variation, according to the data obtained from the pure tone
average threshold of the shockwave procedure on the otoacoustic emission test.