Outer Ear and Middle Ear
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Acoustic reflex | the contraction increases the impedance of the middle ear system by increasing the stiffness of the ossicular chain
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| Azimuth estimation | the process of determining the direction on the horizontal plane at which a sound is arriving at the listener.
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| Binaural localization cues | localizations cues created by differences between sounds arriving at the right ear and left ear
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| Buckling effect |
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| Cerumen | earwax
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| Distance estimation | the process of determining how far one is from a sound source
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| Elevation estimation | process of determining the angle between the horizontal plane and the vertical plane from which the sound is arriving.
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| Interaural | related to the difference between ears
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| Interaural intensity difference | the difference in intensity of the sound wave arriving to the left ear and right ear
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| Interaural phase difference | the difference in phase of the sound wave arriving to the left ear and right ear.
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| Interaural time difference | the difference in time of arrival of the sound wave arriving to the left ear and right ear
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| Localization | the process of determining the direction of incoming sound or the location of a sound source in space in terms of its azimuth and elevation
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| Localization cues | the specific characteristics of received sounds that are used to determine the direction of incoming sound.
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| Middle ear | an air-filled cavity called the tympanic cavity or tympanum containing the ossicles
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| Monaural | related to one ear
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| Monaural localization cues | localization cues that are created by the reflection and refraction of sound by the folds, cavities, and ridges of the outer ear.
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| Ossicular lever | the anatomic lever created due to a difference in the length of the malleaus and the length of the incus. Force acting at the incus= 1.15 times bigger.
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| Otoscope | an instrument that has a light and a narrow tip and magnifying lens used for examination of the ear canal and tympanic membrane
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| Pressure transformer | pressure increase that results because of the size of the tympanic membrane and the oval window. Tympanic membrane= 17 times bigger than the oval window.
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| Transducer | a device that changes energy from one form to another
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| Tympanic cavity | an air-filled cavity of the middle ear containing the ossicles
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| Valsalva maneuver | procedure that punches air into the middle ear cavity via the Eustachian tube (popping your ears) forces the Eustachian tube to open and admit ear
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Created by:
megsy22
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