How to verify that piano, violin, cello? As show choir, singing polyphonic piece without accompaniment (a Cappella)sounds, with which he should start singing? For this purpose there is a special device - a tuning fork. Sometimes the tuning fork is made of metal in the form of a curved plate. At the bend there is a handle with a ball on the end. If you lightly strike the tuning fork with some solid object, then the loose ends begin to tremble, to vibrate and you hear the sound.
Another view of the tuning fork is a small tube that emits a sound if it blow.
Brass tuning fork
Usually the tuning forks are made so that they emit the sound of the first octave. However, there are tuning forks, tuned and other sounds. Knowing exactly how it sounds one note, you can correctly set up and all the rest. Therefore, the tuning fork is very necessary to many Adjusters pianos and violinists, singers, singing without accompaniment, and the conductors of the choirs.