Precise acoustical criteria are then established. Further, the Ostergaard staff provides information and up-to-date research data to meet these acoustical needs. The firm is noted for innovative approaches to what are frequently complex challenges.

Collectively, the staff of Ostergaard Acoustical Associates has a century of experience in the relatively new field of acoustics. The staff remains technically current through their wide ranging project experience, and active participation in major technical societies including: Acoustical Society of America; Institute of Noise Control Engineering; ASTM; Audio Engineering Society; New Jersey Society of Architects; and, the American Industrial Hygiene Association.

The firm was formed in 1971. R. Kring Herbert joined the firm the following year. He contributes his expertise in architectural acoustics. Edward M. Clark, P.E. arrived in 1982 bringing a wealth of experience in mechanical systems, industrial and environmental noise control. Dr. John Erdreich joined in 1986. He contributes experience in psycho acoustics, medical acoustics, and provides scientific counsel to legal clients. In 1988 Herbert, Clark and Erdreich became the principals of the firm. The organization's name was then changed to Ostergaard Acoustical Associates to better reflect its mission to its growing roster of clients.