Barbershop music countertenor, the baritone resembles the Heldentenor or lyric baritone in range and a tenor in tessitura, and the lead generally corresponds to the tenor of classical repertoire, with some singers possessing a tessitura more similar to that of a high baritone. Barbershop singing is performed both by men's and women's groups; the elements of the barbershop style and the names of the voice parts are the same for both. The defining characteristic of the barbershop style is the "ringing" chord, one in which certain overtones of the four voices reinforce each other, sometimes so strongly that the overtone is perceived
Barbershop music in the United States were in the habit of using multiple initials to denote their function. The group adopted the alternate name "Barbershop Harmony Society" early in its history. While its legal name has never changed, it changed its official brand name to "Barbershop Harmony Society" in 2004. "Sharp Harmony", a Norman Rockwell painting, appeared on the cover of "The Saturday Evening Post" magazine issue dated September 26, 1936; it depicts a barber and three clients enjoying a cappella song. The image was adopted by SPEBSQSA in its promotion of the art. Traditionally, the word "barbershop" has been used to