Patent ID: 9674626
Date: 2017-06-06
CPC Classifications: G01R,H04R

Claim:
1. An apparatus for measuring the phase and magnitude differences between at least first and second microphones mounted within a device, the device including an outer housing having at least first and second apertures formed therein corresponding to locations at which the at least first and second microphones are situated, the first and second apertures formed in the outer housing of the device being spaced apart from each other along the outer housing by a predetermined separation distance, the apparatus comprising: a) a mounting plate having a mounting surface and having a smooth opposing surface opposite the mounting surface, the mounting plate being configured to be placed proximate to an audible signal source; b) an aperture formed in the mounting plate and extending from the mounting surface to the smooth opposing surface, the aperture formed within the mounting plate being of a first predetermined size that is smaller than the predetermined separation distance; c) a gasket having an opening, the opening of the gasket being of a second predetermined size generally commensurate with the first predetermined size of the aperture formed in the mounting plate, the second predetermined size being smaller than the predetermined separation distance, the gasket being placed against the mounting surface for forming a seal between the mounting surface and the outer housing of the device; and d) a clamp configured to physically support the device at a desired angular position; and e) a jack coupled to the clamp for selectively urging the clamp, and the device supported thereby, toward the gasket and the mounting surface; whereby the jack may be manipulated to urge the outer housing of the device against the gasket and mounting surface for alternately aligning the first aperture of the device and the second aperture of the device with the aperture formed in the mounting plate and the opening in the gasket, thereby allowing measurements to be taken of the excitation signal received by the first microphone when the first aperture of the device is urged against the mounting surface, and allowing measurements to be taken of the excitation signal received by the second microphone when the second aperture of the device is urged against the mounting surface, irrespective of the shape of the outer housing and irrespective of the locations of the at least first and second apertures formed in the outer housing and associated with the at least first and second microphones.