AIRCRAFT NOISE ASSESSMENT, ARCHITECTURAL ACOUSTICS, COMMUNITY NOISE SURVEYS, ENVIRONMENTAL IMPACT STATEMENTS, EXPERT WITNESS, FIELD TESTING, HEARING CONSERVATION SERVICE, INDUSTRIAL NOISE CONTROL, MECHANICAL SYSTEM AND HVAC, OPEN-PLAN OFFICE ACOUST ICAL DESIGN, PRODUCT NOISE CONTROL, PRODUCT SOUND DESIGN, THEATER AND CONCERT HALLS, TRANSPORTATION NOISE CONTROL, VIBRATION ANALYSIS AND CONTROL, HEARING CONSERVATION SERVICE, THEATER AND CONCERT HALLS