42 TURNKEY SERVICES FOR OTHERS, NAMELY, DESIGN OF NOISE REDUCTION SYSTEMS; INDUSTRIAL DESIGN, DRAFTING, ENGINEERING, MATERIAL TESTING, MECHANICAL RESEARCH, AND TECHNICAL PROJECT STUDIES RELATING TO SILENCING ARTICLES AND STRUCTURES, NAMELY, LAYERED ACOUSTICAL ASSEMBLIES, MODULAR ACOUSTICAL PANEL PACKAGES, ACOUSTICAL BARRIERS, ACOUSTICAL BUILDINGS, ACOUSTICAL EQUIPMENT ENCLOSURES, ACOUSTICAL MECHANICAL SYSTEMS, ACOUSTICAL DOORS AND WINDOWS; INSTALLATION OF INTERIOR ACOUSTIC AND BUILDING ENCLOSURES, NAMELY, WALLS, DOORS, ROOFS AND WINDOWS AND ACOUSTIC AND MODELING SURVEYING; DESIGN AND INSTALLATION OF INTERIOR ACOUSTIC AND BUILDING ENCLOSURES, NAMELY, WALLS, DOORS, ROOFS AND WINDOWS; PROVIDING INFORMATION ABOUT BUILDING ACOUSTICS VIA A GLOBAL COMPUTER NETWORK