![]() ![]() For each degree Centigrade increase in temperature, the speed of sound increases by 0.61 m/sec or 2.0 ft/sec. ![]() Propagation speeds for other media are given in the chart below. Here, we show that a combination of these two constants results in a new dimensionless constant that provides the upper bound for the speed of sound in. At 20☌ (68☏) the speed is 1130 ft/sec or 344 m/sec. Some sound waves can be characterized as periodic waves, which means that the atoms that make up the matter experience simple harmonic motion. At 0° Centigrade and 1.013 x 10 5 Newtons per square meter (normal atmospheric pressure), the speed of sound is 331.5 meters/sec, i.e. Neither pitch nor loudness changes that speed. In air, for instance, temperature and atmospheric pressure are significant factors. It might seem surprising that sound moves only at one speed in the air around us. See also: ACOUSTIC IMPEDANCE, PARTICLE VELOCITY, REFRACTION, SOUND PROPAGATION. Many aeronautical engineers believed the. The speed of a SOUND WAVE varies greatly when propagated in different media, the PROPAGATION velocity depending on the elasticity (or compressibility), temperature and density of the medium in question. The Bell X-1 was designed to test whether aeroplanes could handle the stresses of flying near the speed of sound. ![]()
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