Prime purpose of this lecture of this lecture is to present on Wave Patterns of Sound. Waves – Rhythmic disturbance that carries energy. Wavelength – Distance between a point on a wave and the identical point on the next wave. Period – Time required for one wavelength to pass. Frequency – Number of waves passing per second. The unit of measure is hertz (Hz). Amplitude – Greatest distance of a wave’s rise or fall. Wave Velocity – Wave velocity is the distance a wave travels per second.