Hornbostel and Sachs system

…Mahillon’s basic division, creating the classification now used in most systematic studies of instruments. The name idiophones was substituted for autophones, and each class was subdivided according to a method similar to that used by botanists. A fifth class, electrophones, in which vibration is produced by oscillating electric circuits, was…

…West the most widely accepted system of classification is that developed by E.M. von Hornbostel and Curt Sachs, a method based on the type of material that is set into vibration to produce the original sound. Thus, stringed instruments are identified as chordophones—that is to say, instruments in which the…

The Sachs-Hornbostel system further classifies aerophones as free aerophones or as wind instruments proper. The wind instruments subdivide into edge instruments, reedpipes, and trumpet-type instruments according to their manner of tone production. Free aerophones, which include a variety of folk instruments as well as such technologically…