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Determine the speed of sound in different media. Derive the equation for the speed of sound in air. Determine the speed of sound in air for a given temperature. Sound, like all waves, travels at a certain speed and has the properties of frequency and wavelength.
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s.
Describe the relationship between the speed of sound, its frequency, and its wavelength. Describe the effects on the speed of sound as it travels through various media. Describe the effects of temperature on the speed of sound.
Learning Objectives. By the end of this section, you will be able to: Explain the relationship between wavelength and frequency of sound. Determine the speed of sound in different media. Derive the equation for the speed of sound in air. Determine the speed of sound in air for a given temperature.
Speed of Sound. Speed of sound (c) = f (temperature (T), salinity (S), depth (z)), units ms-1. c = 1449.2 + 4.6 (T) – 0.055(T)2 + 0.00029(T)3 + (1.34 – 0.01(T)) (S-35) + 0.016z. Freshwater ~ 1500 ms-1. Salt water ~ 1460 – 1550 ms-1. Air ~ 330 ms-1. Effect of T > S.
Relate the characteristics of waves to properties of sound waves; Describe the speed of sound and how it changes in various media; Relate the speed of sound to frequency and wavelength of a sound wave
5 Δεκ 2015 · The speed of sound is the distance traveled over time by a sound wave in an elastic medium. The SI unit of speed is meters per second or (m/s). The speed of sound in dry air at 20 ° C is 343.2 m/s. In different mediums (gas, solids, or liquids) the speed of sound is different than 343.2 m/s.
