PSYB51H3 Lecture Notes - Lecture 9: Sine Wave, Longitudinal Wave, Sound Energy
Document Summary
Thick fog unable to see boats; all you can see are two buoys we use the movement of the 2 buoys to construct the mess and chaos of the lake. The basics: nature of sound, anatomy and physiology of the auditory system, how we perceive loudness and pitch. Hearing in the environment: sound localization (where?) The black horizontal lines are constant the channel in which air is located. Red vibrating membrane that pushes in the air and increases density of molecules locally, then reduces density of molecules locally. If sound source were a local point; molecules get pushed away and drawn towards that point back and forth. Air molecules that undergo transmission through wind carries sound. Amplitude how loud and how much sound energy there is (hit hard or softly; same frequency but louder) Basic qualities of sound waves: amplitude: magnitude of displacement of a sound pressure wave. Humans can hear across a wide range of sound intensities.
