The manufacturer of a machine for optical character reading requested assistance in solving the noise problems resulting from a new design. The noise of the new machine was at such a level as to bar its acceptance by potential clients. Initial sound level readings, tape recordings and real time analysis resulted in identifying problems with noisy gears, nonisolated panels, loud bushings, shafts and paper slap. Recommendations were made to the manufacturer and subsequent changes resulted in lower sound levels. New sound measurements indicate other areas for noise reduction which are in the process of being incorporated into the final design. [Student Research Project.]