LING 330 Lecture Notes - Lecture 8: Vocal Tract, Digital One
14 Nov 2015
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Document Summary
The three forms of the acoustic speech signal. The acoustic wave: the signal that can be heard by the ear or sensed by a microphone. The ear or a microphone respond to sound pressure variation in the atmosphere. The ear converts the air pressure variations into neural impulses that are sent to the brain for interpretation. The microphone converts air pressure variations into electrical signals. Microphones are transducers (= converting one form of. Technically, the airborne acoustic signal of speech is called the propagated or radiated acoustic signal: it propagates or radiates into space after it emerges from a speaker"s vocal tract. energy into another) The stored analog signal e. g. audio tape recording. An analog signal varies continuously in its pressure (= amplitude) and time properties. Magnetic tapes store the speech signal as a magnetic field; like the original airborne acoustic signal, it varies continuously in its properties.
