AN APPARATUS FOR CREATING ACOUSTIC ENERGY IN A BALANCED RECEIVER ASSEMBLY AND MANUFACTURING METHOD THEREOF

摘要

A paddle ( 142 ) of a diaphragm ( 118 ) of a receiver ( 100 ) is manufactured using one or more layers of a material selected for their inertial mass and rigidity. The paddle may have a layered structure with stiff outer layers such as aluminum and a less dense inner layer, such as thermoplastic adhesive. The inner and outer layers are selected to give an inertial mass matching that of an armature ( 124 ) of the receiver ( 100 ) and to give a lowest frequency bending resonance above a desired range, for example, 14 KHz.