This is a 9th grade level set of flash cards that are all about sound waves. LIGHT A wave with a direction of propagation that is perpendicular to its direction of oscillation. A wave with a direction of propagation that is parallel to its direction of oscillation. Highest Point on a wave. Lowest point on a wave. Distance between the crests (or troughs) Height of a wave. How many waves hit a certain point every second. Inversely Proportional Speed. f=v/wavelength 1/sec; Hertz (Hz) Compressed section of a longitudinal wave, similar to the crest of a transverse wave. Pulled apart sections of a longitudinal wave, similar to the trough in a transverse wave. Longitudinal. 6 Hz. frequency decreases. A thin layer of tissue stretched across the ear canal. The sound won't travel and cannot be heard because there is no medium for it to travel through. v= (331.5 + 0.6 x T)m/s Convert the temperature to Celsius. Solids, liquids, gasses Any speed that is fater than the speed of sound in the sunstance of interest. The speed of sound Ten times the speed of sound (Mach 1) The sound produced as a result of an object traveling at or above Mach 1. Flying at or above Mach 1 will create a shock wave that is damaging to buildings and the human ear. An indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave. low low; high OR small; large Waves with frequencies in between 20 and 20,000 Hz. This is the range of hearing for the human ear. Waves with frequencies higher than 20,000 Hz. Waves with frequencies lower than 20 Hz. bel amplitude One tenth zero 130