PSYCH 3A03 Lecture Notes - Trigonometric Functions, Damping Ratio, Psych

• School: McMaster University
• Department: Psychology
• Course: PSYCH 3A03
• Professor: Paul Faure

Document Summary

Spatial difference between two identical points is a wavelength. Can be expressed in space or time. = c/f = 344ms/cycles/s; = m/cycle. Wavelength is a scalar quantity (it has magnitude only) Sound of higher frequency have shorter wavelengths. Sounds of lower frequency have longer wavelengths. The speed of sound propagation trough the medium also affects the sound wave. Starting phase is the point in the displacement cycle at which the object begins to vibrate. Units of phase = degrees (o) [also radians ( =rad)] Phase angle varies from 0o-360o [0-2 radians] All sinusoids must have a starting phase angle. Starting phase is relative to 0o (start of waveform) Two sinusoid of the same frequency with different starting phases are said to be out of phase. The phase difference between two sinusoids of the same frequency is determined by examining any two points along the time axis.