Open earphones with two pressure relief holes

An open earphone, comprising:

• a sound production component including a transducer and a housing accommodating the transducer, the transducer including a diaphragm;
• an ear hook, wherein in a wearing state, a first portion of the ear hook is hung between an auricle and a head of a user, and a second portion of the ear hook extends towards a side of the auricle away from the head and connects to the sound production component to place the sound production component in a position near an ear canal but not blocking the ear canal, wherein
• an inner side surface of the housing facing the auricle is provided with a sound outlet for guiding a sound generated at a front side of the diaphragm out and to the ear canal, one or more other side walls of the housing are provided with at least two pressure relief holes for guiding a sound generated at a rear side of the diaphragm out, the at least two pressure relief holes includes a first pressure relief hole and a second pressure relief hole, and a distance between a center of the first pressure relief hole and a center of the second pressure relief hole is in a range of 13.0 mm to 15.2 mm;
• and
• wherein a distance from a center of the sound outlet to a mid-perpendicular plane of a connection line between the center of the first pressure relief hole and the center of the second pressure relief hole is in a range of 0 mm to 2 mm.