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Class 9/17
Hearing Sciences
| Question | Answer |
|---|---|
| How is the Pinna/Auricle attached to the skull? | through skin, cartilage, ligaments, and muscles |
| What is a sound level meter? | a device used to measure the level of sound |
| What unit does a sound level meter use? | dB SPL or dBA |
| How does the level of sound change from outside the ear to inside the ear canal? | It increases by a specific amount (in dB) based on the individual ear canal resonance |
| What is the first thing to do to measure ear canal resonance? | Calibrate the sound level meter |
| What is the second thing to do to measure ear canal resonance? | play a sound through a speaker at a consistent dB level |
| What is the third thing to do to measure ear canal resonance? | measure the sound outside and inside the ear canal |
| What is sound localization? | the ability to determine the location of a sound |
| Why is sound localization important? | it is necessary to know who is talking to you, where danger could be coming from, etc |
| If a sound source is on the left side, which ear will hear higher frequencies? | the left ear |
| How does the brain decide where a sound is coming from? | It analyzes which ear is hearing higher frequencies |
| Which level of frequency is harder to localize? | low frequency sounds |
| What is the Head Shadow Effect? | The reduction of high frequency sounds as it moves from one side of the head to the other |
| What is a wavelength? | the physical distance for one cycle |
| What happens to sounds that are larger than the head? | they are not impacted by the head shadow effect, meaning they are not reduced |
| What happens to sounds that are smaller than the head? | they are impacted by the head shadow effect, meaning they are reduced |
| Where is the middle ear located? | in the tympanic cavity in the temporal bone |
| What is another name for the tympanic cavity? | the tympanum |
| What is the middle ear bounded by laterally? | the tympanic membrane |
| What is the middle ear bounded by medially? | the inner ear |
| What is the volume of the middle ear? | 2 cc |
| What fills the middle ear? | air |
| What is the anterior surface of the middle ear? | the eustachian tube |
| What is the posterior surface of the middle ear? | the mastoid portion of the temporal bone |
| What is at the inferior surface of the middle ear? | the jugular vein |
| What is the superior surface of the middle ear? | The tegmen tympani |
Created by:
hrshook0104
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