1. amplitude a region of spread (low pressure, or density) in a longitudinal wave
2 . rarefaction a region of compression (high pressure, or density) in a longitudinal wave
3 . frequency the rate at which distance is covered in a given period of time; d/ t
4 . torsional wave the number of waves (vibrations, revolutions, or cycles) that pass a given point per unit time
5 . periodic wave a wave in which the pulse oscillates perpendicular to the direction of the wavepath
6 . longitudinal wave the distance between identical parts of a wave
7 . wave a wave of short duration; a nonrepetitive pulse
8 . condensation the time required for a complete wave to pass a given point; reciprocal of frequency
9 . crest a regular succession of pulses or identical disturbances
10 . velocity any regular, measured beat; specifically, a nonrecurrent or nonrepetitive wave
11 . period the highest part of a wave
12 . transverse wave a wave in which the pulse oscillates around the equilibrium position in a rotational motion
13 . nonrecurrent wave the maximum displacement from an equilibrium position
14 . trough the lowest part of a wave
15 . pulse a disturbance in a medium that transfers energy without transferring matter
16 . wavelength a wave in which the pulses oscillate parallel to the direction of the wave path