PSYCH 3A03 Lecture Notes - Sine Wave, Tuning Fork, Electrical Resistance And Conductance
5 Nov 2013
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Document Summary
The duration of the continued oscillations or vibrations is directly proportional to the magnitude of input force and inversely proportional to amount of damping. Low damping: vibrations continue for long time (e. g. tuning fork) High damping: vibrations continue for only a brief time. In any damped system, the ratio of amplitudes (a1/a2) for two consecutive cycles of a vibration is constant xt(t) = x0e. Any function with a constant ratio can be expressed logarithmically, e. g. natural log (ln) or e. Magnitude of damping is described by the damping factor. Damping factor of zero indicates that there is no attenuation. Vibrations continue to oscillate for some time. An object"s resonant frequency is described by , where. Sine wave generator in which we can change the frequency (the period of the vibration) is attached by a probe in order to measure the frequency output. Can also measure amplitude input and amplitude output.
