Tuners and Metronomes
The tuner is an electronic device for tuning a musical instrument. It recognizes the tone of the instrument through structure-borne noise, via a built-in microphone or through a cable with a connected pickup, and shows on a scale whether the tone is too high, too low or correct. The metronome is a device that uses acoustic impulses to set a constant tempo at regular time intervals. Metronomes are available mechanically or electronically. Many instruments such as pianos or keyboards already have a metronome integrated.