Patent ID: 8770338

Claim:
A device for altering sound received at a subject's ear, the device comprising: an elongated earpiece having a proximal portion and a distal portion and defining a longitudinal axis, wherein the proximal portion comprises: an insert configured for at least partial insertion in the canal of the subject's ear, the insert comprising: a first elongated stem positioned generally parallel to the longitudinal axis and tapering from its distal end to its proximal end; at least 3 insert flanges, each insert flange fixed along the length of the stem generally perpendicular to the longitudinal axis; and a stop flange fixed to the stem distal to the insert flanges at its distal end and having an outer periphery with a major extent and a minor extent with the major extent greater than the minor extent, and the distal portion comprises: a handle fixed to at least a portion of a distal surface of the stop flange and configured to guide insertion of the insert in the subject's ear canal.