vibration-numbers

of sounds vary in inverse ratio with the length of A single vibratheir sound-wave. tion is from the point of rest to one extreme of motion, but is often calculated from one extreme to the vibration is A double opposite. measured from one extreme to the opposite and back again. sympathetic v. is that which is set up in an object (as a string, tuning-fork or even a plate) when the tone to which it vibrates naturally is sounded by Thus pre some other instrument. the loud pedal of a piano, to remove the dampers, and sing or play on a This note will be violin any note. heard at once sounding on the piano its partials Furthermore, string. will be similarly heard. Lay vicar of a cathevic’ar-choral. dral choir.