A Sousaphone or Sousafon is a musical instrument.
Musician with sousaphone
trombone, sousaphone, trumpet on streetcar for Twelfth Night celebration, New Orleans
Costumed Sousaphone player
Sousaphone player at back right; Glockenspiel at front left
Sousaphone player in background; trombone player in foreground
Brass band with Sousaphone at back right
Sousaphones used by Guggenmusik bands during Eis-zwei-Geissebei in Rapperswil, Switzerland