D. Stewart, Ph.D., FASA, FASTM, INCE
Our firm founder,
Dr. Stewart is now semi-retired, working part-time primarily assisting the
rest of the staff and concentrating on work in the office, primarily on
matters related to sound isolation.
President of the National Council of Acoustical Consultants 2000-2002.
In acoustics since 1967 and consulting full time 1981-2015.
Consulting projects covering the broad spectrum of problems involved in
architectural acoustics, environmental and community noise, and industrial-occupational
A native of North Carolina familiar with the environment, industries and
building practices of the region.
Has assisted architects and engineers in the design of award-winning buildings
and has helped owners correct problems in existing buildings.
Co-author of chapter on Community Noise in Fifth Edition of The Noise
Manual of AIHA
Participates actively in the development of ASTM standards for architectural
acoustics and community noise evaluation. Received the Wallace
Waterfall Award in 2005 for contributions to the development, preparation,
and acceptance of standards in acoustics. Received the ASTM Award of
Merit in 2010 for distinguished,
dedicated, and outstanding leadership in developing and promulgating
acoustical field test and community noise standards in ASTM International
Committee E33 on Building and Environmental Acoustics and for liaison
service as an expert with other acoustical organizations.
Service to the Facilities Guideline
Institute on committee to develop acoustical requirements for residential
facilities and on change proposal review committee for acoustics.
Principal noise control expert for the 1990 National Institutes of Health
Consensus Conference on Noise and Hearing Loss.
Assisted industry and local governments in resolving community noise problems.
Taught a national community noise teleconference course for the American
Served as an expert witness in Federal District Court, North Carolina
District and Superior Courts, South Carolina Administrative Law Court,
and before arbitration proceedings.
A strong participation in technical society activities including over
45 years membership in the Acoustical Society of America, serving continuously
on the local chapter executive committee since 1977. Recognized as
a Fellow of ASA for contributions to building acoustics and noise control.
A record of over
75 publications, seminars, and presentations to technical
societies, including 7 refereed papers, and 17 invited presentations to
national and international conferences.
Elected to initial class of the NCSU
Mechanical and Aerospace Engineering Hall of Fame 2013
North Carolina State University
Mechanical & Aerospace Engineering
*BSME (with honors)-1969
Graduate specialization in
acoustics and noise control
Phi Kappa Phi
Tau Beta Pi
Pi Tau Sigma