audiology…

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what the risks are ear anatomy, audiometry, hearing test, audiography, audiogram, an audiology exam tests ability to hear sounds, sounds vary according, intensity, volume, loudness, tone, speed of sound wave vibrations, hearing occurs, sound waves, conducted, nerves, the inner ear, brain, sound waves, travel, inner ear by air conduction, the ear canal, eardrum, bones, the middle ear, bone conduction, the bones around, behind the ear, intensity of sound is measured in decibels, db, a whisper, 20 db, loud music, concerts, around 80 to 120 db, a jet engine, 140 to 180 db, sounds greater than 85 db, cause hearing loss, few hours, louder sounds, cause immediate pain, hearing loss, very short time, tone of sound is measured in cycles per second, cps, hertz, low bass tones range around 50 to 60 hz, shrill, high-pitched tones range around 10,000 hz, higher, normal range of human hearing, 20 hz to 20,000 hz, animals, hear up to, 50,000 hz, first steps, estimate the need, an audiogram, specific procedures, generally involve blocking one ear at a time, checking, the ability to hear whispers, spoken words, sound of a ticking watch, a tuning fork used, tuning fork is tapped, in the air on each side, the head to test the ability to hear by air conduction, tapped, placed against the mastoid bone behind each ear to test bone conduction, audiometry provides a more precise measurement of hearing, air conduction is tested by having wear earphones attached, audiometer, pure tones of, controlled intensity, delivered, to one ear at a time, asked, raise a hand, press a button, indicate, hear a sound, minimum intensity, volume, required to hear each tone is graphed, an attachment, a bone oscillator, against the bone behind each ear, mastoid bone, to test bone conduction, no special preparation is needed, infants, children, test depends on child's age, prepare child, infant test, procedure preparation, birth to 1 year, toddler test, procedure preparation, 1 to 3 years, preschooler test, procedure preparation, 3 to 6 years, schoolage test, procedure preparation, 6 to 12 years, adolescent test, procedure preparation, 12 to 18 years, no discomfort, length of time, an initial screening, take, 5 to 10 minutes, detailed audiometry, take, 1 hour, this a screening test to detect a hearing loss at an early stage, is difficulty in hearing from any cause, common causes, hearing loss, chronic ear infections, ruptured eardrum, acoustic trauma, occupational hearing loss, head injury, inherited conditions, the inner ear, medications, toxic, nerve, the inner ear, certain antibiotics, neomycin, diuretics, large doses of salicylates, aspirin, ability to hear a whisper, normal speech, a ticking watch is normal, ability to hear a tuning fork, air, bone is normal, in detailed audiometry, hearing is normal, tones from 250 hz, 8000 hz, heard at 25 db, lower, many different kinds, degrees of hearing loss, only the loss, the ability to hear high, low tones, loss of only air, bone conduction, inability to hear pure tones below 25 db indicates some extent of hearing loss, extent, kind of hearing loss, give clues, prognosis, probable outcome, following conditions, affect test results, acoustic neuroma, acoustic trauma, age-related hearing loss, alport syndrome, labyrinthitis, meniere's disease, occupational hearing loss, otosclerosis, ruptured, perforated eardrum, no risk, many hearing function tests, from simple screenings, producing a loud noise, observing the test subject, startle response, to complex, detailed measurements the brainstem auditory evoked responses test, baer, an electroencephalogram, detect brain wave response to sounds.