PSYB51H3 Lecture Notes - Lecture 9: Sound Pressure, Tectorial Membrane, Basilar Membrane
Document Summary
The function of hearing: the basics, nature of sound. What is sound: anatomy and physiology of the auditory system, how we perceive loudness and pitch, impairments of hearing, hearing to in the environment, sound localization (where?) What is sound: sounds are created when objects vibrate. Sound doesn"t work in outer space: vibrations of object cause molecules in object"s surrounding medium to vibrate as well, which causes pressure changes in medium. Molecules move towards and away from object. Waves are being tracked: longitudinal direction, speed of sound depends on density of medium. What is sound? (cont"d: basic qualities of sound waves, amplitude: magnitude of displacement of a sound pressure wave, energy. Jet engine 150dbs: we perceive subjectively these increments of loudness in some sort of regular fashion, But in terms of energy, there is an exponential relationship doubling of energy. 90dbs to 150dbs huge difference: subjective experience is different from physical experience.
