PSYCH 2E03 Lecture Notes - Sound Pressure, Tuning Fork, Additive Synthesis
15 Jun 2013
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Document Summary
Amplitude/loudness if determined by sound pressure level sound pressure level is expressed in decibels logarithmic scale. The periodic condensation and rarefaction of air molecules produced by a tuning fork. Sounds in real-life are complex (unlike a tuning fork) A sound synthesizer adds pure tones to create a complex sound. Auditory nerves are only equipped to conduct specific frequencies and not complex wave patterns. Outer ear pinna and auditory canal. Auditory canal tube-like 3cm long structure it protects the tympanic membrane at the end of the canal the resonant frequency of the canal amplifies frequencies between 1,000 and 5,000hz. The middle ear two cubic centimeter cavity separating inner from outer ear it contains the three ossicles. Malleus: moves due to the vibration of the tympanic membrane. Stapes: transmit vibrations of incus to the inner ear via the oval incus: transmits vibrations of malleus window of the cochlea.
