CMD 278 Lecture Notes - Lecture 6: Tuning Fork, Sine Wave, Frequency Response

• School: URI
• Department: Communicative Disorders
• Course: CMD 278
• Professor: Milner Bethany

Document Summary

Amplitude: (cid:498)strength of vibration(cid:499) object at rest. Exam 2: amount of vibratory displacement; distance molecules are displaced from, psychological correlate: loudness, 4 ways to measure amplitude; 1 varies with time, the others are time- dependent: Amount of vibratory displacement at any given moment in time along the waveform. Point of positive or negative maximum displacement. Total distance from point of positive max displacement to negative max displacement. Square root of the mean of the squared deviations of the instantaneous pressure. Want average ia of a waveform: average ia of a sine wave = 0, squares ias become +, then compute average and square root of this value, rms amplitude = peak amplitude x 0. 707 (1/2 square. Phase: the point in a cycle when an object begins to vibrate root of 2: measured in degrees, starting phase, instantaneous phase: measurement of phase at any point along the waveform.