Board vibration has been identified as the dominant noise generating mechanism for a majority of wood planers. The effectiveness of compact enclosures is greatly diminished owing to board vibration, since a portion of boards of normal stock length is always outside of the enclosure. A vibration suppression system has been designed to operate inside of an enclosure to reduce the amount of vibratory energy transmitted outside through the boards being machined. The system developed and its effectiveness in reducing wood planer noise when used in conjunction with a compact enclosure is described in detail. [Newman Machine Company and NASA are acknowledged for support of this work.]