A housing for a supercharger assembly is provided having an inner wall at least partially defining a rotor cavity. For motion, measured motion values are compared with a motion threshold and the taking of physiological measurements used for computing the physiological parameter estimate values are either suspended until a measured motion value is under the threshold or a correction function is applied to the physiological measurements, the correction function being based on the measured motion values. Oxidation is performed to form thicker or thinner oxide portions on the exposed portions of the first and second structures relative to unexposed portions of the first and second structures. A die having a circuit integrated therein is attached to the ground plane. An improvement resides in miniaturizing and simplifying operation, and in greater manufacture speed and mass production.