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33 Cards in this Set
- Front
- Back
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Otitis externa
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an inflammation of the external auditory meatus.
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Osteosis
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a bony growth in the ear canal
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Tympanosclerosis
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formation of whitish plaques in the tympanic membrane and masses of hard connective tissue around bones of middle ear.
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Tympanic Membrane Perforation
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hole in the eardrum
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Serous Otitis Media
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the collection of fluid in the middle ear space, with possible drainage into external ear canal.
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Acute Otitis Media
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condition characterized by rapid onset of short duration often middle ear infection.
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Chronic Otitis Media
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condition of long-standing middle ear infection
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Cholesteatoma
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a tumor, usually occuring in the middle ear and mastoid that combines fats and epithelium from outside middle-ear space.
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Otosclerois
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laying down new bonees in the middle ear, usually around the footplate of the stapes.
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Mastoiditis
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infection of the mastoid
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Polyps
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a projecting mass of swollen and hypertrophied or tumorous membrane.
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Audiology
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the discipline involved in the prevention, identification, and evaluation of hearing disorders, the selection and evaluation of hearing aids, and the habilitation/rehabilitation of individuals with hearing impairments.
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Sound
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a mechanical disturbance propagated through a physical medium.
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What is the psychological percept to intensity?
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loudness
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What is the physical counterpart to pitch?
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frequency
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How is sound created?
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motion or vibration of an object
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What are the units for the frequency of a waveform?
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CPS or Hz
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What are the units for the period of a waveform?
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seconds
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What is the impact of hearing impairment (adults and children)?
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Children
*lag in speech and language *lag in academics *lag in social psychological development this all also depends on the severity of the hearing loss and the age. Adults *not as social *poor general health *tend to be depressed, anxious *tend to stay inside |
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What are some statistics of the prevalance of hearing impairment?
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*26 million people are hard of hearing
*2 million people are classified as deaf *30 million people are regularly exposed to hazardous noise levels *10 million people have some degree of permanent noise-induced hearing loss |
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What is the moving together of air particles?
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Condensation
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What is the moving apart of air particles?
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Rarefraction
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What is the intensity level required to elicit the acoustic reflex?
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80-90dB
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What is the amount of attenuation offered by the acoustic reflex?
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10-30dB depending on frequency
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What are the functions of the outer ear?
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*protection
*absorbs acoustic energy *carries acoustic energy to tymmpanic membrane |
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What are the functions of the middle ear?
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*protection for inner ear
*acoustic energy changes into mechanical energy |
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What are the functions of the eustachian tube?
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*drains both normal and diseased fluid
*equalizes air pressure between environment and middle ear space. |
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What is the function of the middle ear muscles?
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*protects inner ear from loud sounds
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What is the area difference between the tympanic memberane and the oval window?
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14 to 1 between
14 and 17 times larger that the oval window |
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Acoustic Reflex
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contraction of one or both of the middle-ear muscles in response to an intense sound.
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What is acoustic reflex also refferred to as?
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stapedial reflex
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What is the function of the acoustic reflex?
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measure the stapedius and tensor tympani reflex generated eardrum movement in response to intense sound
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What is the function of the external auditory meatus?
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helps funnel sound from environment up to eardrum.
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