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S4 - Acoustics

Properties of the Ear

QuestionAnswer
What does the outer ear consist of and what are their functions? Pinna - determines direction of the sound source is coming from and collects the arriving sound wave. Ear Canal - cylindrical; 27mm long; resonance at 3800Hz; responsible for sensitivity of the ear; boosts response in this frequency range.
What does the middle ear consist of and what are their functions? Ear Canal - filled with air; connected to throat by Eustachian tube; canal closed, opened by swallowing/yawning; enables pressure equalisation. Ossicles (Hammer, Stirrup and Anvil) - transmit sound efficiently.
What does the inner ear consist of? Semicircular canals (balancing) Cochlea (hearing)
What are the properties of the cochlea? Curled conical tube filled with a water fluid. About 35mm long with a diameter of 2mm. Consists of upper gallery and lower gallery; separated by basilar membrane.
Created by: lozmac95