HEADPHONE

A headphone comprising: a support structure that is adapted to sit on a head or upper torso of a user; an acoustic driver carried by the support structure such that the acoustic driver is located off of an ear of the user, wherein the acoustic driver has front and rear sides and sound is radiated from both sides of the acoustic driver; and a structure that defines a first acoustic chamber on the front side of the acoustic driver and a second acoustic chamber on the rear side of the acoustic driver, wherein the first acoustic chamber has at least one opening therein and the second acoustic chamber has at least one opening therein, and wherein: at low frequencies, a polar pattern of the acoustic driver behaves approximately like a dipole, and at high frequencies, a polar pattern of the acoustic driver exhibits a higher order directional pattern.