1. Any type of vibration can be defined by
Any type of vibration can be defined by the pattern of displacement of the particle over time

2. Types of vibration
Based on time
Periodic: Pattern of vibration repeats regularly over time
Non-periodic: No regular pattern of vibration

3. Based on the number of components
Simple: Only one pattern of vibration
Complex: More than one pattern of vibration

4. Sinusoids/Sine waves/Pure tones
Simple wave
A single pattern of vibration
Periodic in nature

5. Properties of a sine wave
Amplitude
Frequency
Starting phase

6. Amplitude Related to displacement of the particle
Can be described in several ways
Instantaneous amplitude
Peak amplitude
Peak-to-peak amplitude
RMS amplitude

7. What is the instantaneous amplitude of this wave at a) 0 s, b) 0
What is the instantaneous amplitude of this wave at a) 0 s, b) s, c) 0.25 s, and d) 0.07 s?

8. What is the peak amplitude? What is the peak-peak amplitude?

9. Root Mean Square (RMS) amplitude
Instantaneous amplitudes
Square these values
Mean (average) of the squared values
Square root of this mean

10. Use the instantaneous amplitudes at 0, 0. 125, 0. 25, 0. 375, and 0
Use the instantaneous amplitudes at 0, 0.125, 0.25, 0.375, and 0.5 seconds to calculate the RMS amplitude of the following wave.