Abstract: An ear tip for coupling to an acoustic device includes a body member having an acoustic passage. The passage has an acoustic input and an acoustic output. An ear interface is disposed at least partially about the body member. The ear interface is formed of a resilient material and is configured to be disposed at least partially in a user's ear canal. An acoustically transmissive barrier is coupled to the body member and is disposed across the acoustic passage. In some embodiments, a grate is optionally disposed across the acoustic passage with the grate being located closer to the acoustic output than the acoustically transmissive barrier. A retention structure is disposed on a surface of the acoustic passage. The retention structure is configured to removably fasten the ear tip to the acoustic device, where sound propagates through the acoustic passage and across the acoustically transmissive barrier.

Abstract: A motor includes an armature, a coil, and a magnetic support structure. The motor also includes at least one magnet that defines a space. The coil forms a tunnel. The space is defined by the at least one magnet being aligned with the tunnel formed by the coil. Portions of the armature extend through the space and the tunnel. An opening at an end of the coil is shaped so as to restrict movement of the armature.

Abstract: A motor includes an armature, a coil, and a magnetic support structure. The motor also includes at least one magnet that defines a space. The coil forms a tunnel. The space is defined by the at least one magnet being aligned with the tunnel formed by the coil. Portions of the armature extend through the space and the tunnel. An opening at an end of the coil is shaped so as to restrict movement of the armature.