Class-D switching amplifiers are increasingly seen as a viable option to overcome size constraints and excessive power consumption, just as with modern hearing health devices. At the most common switching frequencies a Balanced Armature driver can offer substantial power savings. This stems from the different impedance characteristics of Balanced Armature drivers vs. dynamic speakers, a function of their coil design. Class-D amplifiers produce significant energy at ultrasonic frequencies. This energy needs to be blocked by an inductive filter in order to achieve higher efficiency. The inherent inductance of Balanced Armature drivers at ultrasonic frequencies acts as a natural filter. On the other hand, systems with dynamic speakers must find a balance between the effects of higher power loss and the added size and cost of a large inductive filter.