The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 20 Â°C (68 Â°F), the speed of sound is 343.2 metres per second (1,126 ft/s; 1,236 km/h; 768 mph; 667 kn), or a kilometre in 2.914 s or a mile in 4.689 s. The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in ordinary air, deviating slightly from ideal behavior.
A flute is a musical instrument that produces sound when a stream of air is directed against the edge of a hole, causing the air within the body of the instrument to vibrate. Most flutes are tubular, but some are globular or other shapes.
The modern instrument most like the Renaissance flute is the Irish wooden flute. Another flute-like instrument, unchanged from the Renaissance, is the fife. Reed instruments. Most of the reed instruments of the Renaissance were of the double-reed type, like the modern oboe, rather than the single-reed, like the modern clarinet. The basic reed instrument was the shawm. It was the most common loud band instrument, and was used for the sorts of things that brass instruments would be used for today.