Abstract: An earhook adapted to fit on a user ear. In an embodiment of the invention, the earhook includes a first portion having a fixed first curvature and a second portion having an adjustable second curvature for grasping a user ear. The second portion may be adjustably coupled together with the first portion with a coupling mechanism so that the second curvature is adjusted to suit a user preference.

Abstract: A hookswitch actuator including an activating mechanism which maintains the hookswitch circuit of a telephone in an "on hook" state when the activating mechanism is in a first position, or in an "off hook" state when the activating mechanism is in the second position. The movement of the activating mechanism between the two positions is accomplished through the use of a shape memory alloy mechanism. The shape memory alloy mechanism is coupled to the activating mechanism in such a way that heating or cooling of the shape memory alloy mechanism moves the activating mechanism between its two positions. Control of the heating and cooling of the shape memory alloy mechanism is effectuated by controlling the amount of electric current passing through it.