EXHIBIT 21 SUBSIDIARIES STATE OR COUNTRY PERCENTAGE COMPANY OF INCORPORATION OWNED - ------------------------------------------- -------------------- -------------- Research in Acoustics, Inc.................. New York 100% IAC Realty Corporation...................... New York 100% IAC Development Corporation................. New York 100% Industrial Acoustics Company, Ltd........... England 100% Intra-Acoustics Company, Ltd................ Canada 100% Industrial Acoustics Company, S.C. Inc. .... South Carolina 100%