LING 330 Lecture 12: #12
14 Nov 2015
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Document Summary
The human auditory mechanism analyzes sounds according to changes in frequency and intensity across time. The sounds change in their mode of transmission as they travel through the outer. The outer ear funnels the sound: protects the entrance of the canal. Ear canal external auditory meatus: protects the more delicate parts of the ear from the intrusion of foreign objects: a ear canal: air-filled cavity, open at one end (= quarter wave resonator!) The first resonance of a canal 2. 5 cm long is 3440 hz. waxy substance (= cerumen) filters out dust, flying insects etc. it boosts the high frequencies of sounds: Very important! (e. g. much of the sound energy helpful for distinguishing fricatives range above 2,000 hz. ) The middle ear different areas of the membrane are responsive to different frequencies responsive to small pressure variations across a wide range of frequencies. The outer ear is separated from the middle ear cavity by the.
