In summary, Knowles Balanced Armature technology efficiently converts an electrical signal to sound. For its size, the technology is significantly more efficient than traditional dynamic speakers. The resulting size reduction at equivalent sound pressure levels is ideal for in-ear earphone designs. Earphones equipped with balanced armature speakers enable comfortable passive isolation in the ear. Typical ambient noise reduction can exceed 25dB with in-ear earphones. This allows users to listen at more conservative volumes and not compete with the surrounding environmental noise. The noise reduction benefits with in-ear passive solutions are generally better than over-the-ear headphone solutions. In addition, in-ear earphones with balanced armature technology provide a better fit in the users’ ears to maximize bass performance and ensure better left-right ear channel balance.