tuning cone (tuning kon)

A cone of bra , usually hollow, used in tuning metal organ pipes. pipes. When the pitch is to be raised the point of the cone is driven into the top of the pipe so as to increase its flare, and when the pitch is to be lowered the base of the cone is driven over the top of the pipe so as to decrease its flare. Also tuning -horn. tuning-crook (tūʼning-krük), n. In musical in struments of the bra wind group, a crook or loop of tube which may be inserted to change the fundamental tone of the tube. tuning-fork (tū'ning-fork), n. A steel instrument with two prongs, designed to produce, when struck, a musical tone of some particular pitch. Its inven tion is ascribed to John Shore, in the middle of the eigh teenth century. Tuning-forks are particularly useful because their tone is comparatively free from harmonics, and because their pitch is not Tuning-fork. disturbed by ordinary changes of temperature. They are therefore much employed in acoustical investigation and IMG:content-1067.jpg:[blocks in formation] tuning-peg (t (tūʼning-peg), n. tuning-pin (tū'ning-pin), n. IMG:content-1068.jpg:[blocks in formation] peg.