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ComD 334
Outer Ear and Middle Ear
| Question | Answer |
|---|---|
| Acoustic reflex | the contraction increases the impedance of the middle ear system by increasing the stiffness of the ossicular chain |
| Azimuth estimation | the process of determining the direction on the horizontal plane at which a sound is arriving at the listener. |
| Binaural localization cues | localizations cues created by differences between sounds arriving at the right ear and left ear |
| Buckling effect | |
| Cerumen | earwax |
| Distance estimation | the process of determining how far one is from a sound source |
| Elevation estimation | process of determining the angle between the horizontal plane and the vertical plane from which the sound is arriving. |
| Interaural | related to the difference between ears |
| Interaural intensity difference | the difference in intensity of the sound wave arriving to the left ear and right ear |
| Interaural phase difference | the difference in phase of the sound wave arriving to the left ear and right ear. |
| Interaural time difference | the difference in time of arrival of the sound wave arriving to the left ear and right ear |
| 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 |
| Localization cues | the specific characteristics of received sounds that are used to determine the direction of incoming sound. |
| Middle ear | an air-filled cavity called the tympanic cavity or tympanum containing the ossicles |
| Monaural | related to one ear |
| 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. |
| 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. |
| Otoscope | an instrument that has a light and a narrow tip and magnifying lens used for examination of the ear canal and tympanic membrane |
| 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. |
| Transducer | a device that changes energy from one form to another |
| Tympanic cavity | an air-filled cavity of the middle ear containing the ossicles |
| 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 |
Created by:
megsy22
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