Balanced Armature Check (BAC)

The performance of balanced armature transducers depends on the rest position of the armature, which should be properly centered in the magnetic gap. An offset generates excessive nonlinear distortion and reduces the peak excursion and acoustical output. Measuring the armature offset of the final transducer is hardly possible with mechanical or optical sensors. 
The Balanced Armature Check is a unique measurement tool dedicated to testing electro-magnetic transducers on the production line. The armature offset in μm and effective linear parameters are determined from a purely electrical, high-speed measurement. This gives valuable diagnostics information to minimize the rejection rate.