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.
With this mechanism playing the flute became much easier and the flute did sound much better. Flautists and orchestras were very happy with the invention by Boehm. We still play on flutes made with the mechanism invented by Boehm. Only nowadays flutes are not so often made of wood as they used to be.here came extra holes and keys on the flute to get rid of the fork fingerings. Around 1775 the flute had four keys: d sharp (already existed), b flat key, g sharp key and f key. Eventually more and more keys were added to the flute, but there still wasn't a good system for the keys.