PSYC 100 Lecture Notes - Lecture 10: Logarithmic Scale, Musical Tone, Rarefaction

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

Psych 100 - introduction to psychology - lecture 10: sensation and perception iii: the. Sound results from vibration, vibration causes adjacent air molecules to become compressed into local regions of increased pressure. These pressure changes travel through the air to our ears in waves. The amplitude of a sound wave determines the sound"s intensity. Frequency (which can be directly calculated from the wavelength). Source of illumination usually emits light of many different wavelengths simultaneously, most sounds consist of many different frequencies, which can be shown in a spectrum. Spectrum graph showing different component frequencies (or wavelengths) in a sound (or a source of light) Periods amount of time required for one cycle of a sound wave to pass a particular point. Frequency number of cycles (number of periods) between high and low pressure in one second stated in units called hertz (hz)