Techniques for determining whether a speaker element, or “earpiece,” of an earphone or headphone set is located within, or proximate to, a right ear, a left ear, or neither ear of a user of the set may include receiving a first temperature value from a first temperature sensor, receiving a second temperature value from a second temperature sensor, and determining whether the speaker element is located within, or proximate to, the right ear, left ear, or neither ear, based on (e.g., a difference between) the first and second temperature values. The techniques may further include receiving a third temperature value from a third temperature sensor, such as an user ambient temperature sensor, or a user body temperature sensor, and further determining whether the speaker element is located within, or proximate to, the right ear, left ear, or neither ear, based on the third temperature value.