David J. Parzych

Principal Noise and Acoustical Consultant
David J. Parzych, Principal Acoustical Consultant Dave Parzych has over 30 years of experience in acoustical engineering and noise control design and is the principal and founder of Power Acoustics, Inc.

Since starting Power Acoustics in 1998, he has provided a full range of acoustical consulting services for over 300 clients and hundreds of projects including; sound measurements, analytical modeling studies and working as an expert witness in industrial, commercial, transportation and residential applications. Mr. Parzych has also developed a commercial software package, SPM9613, used worldwide in community noise modeling. He is known as an expert in outdoor sound propagation and modeling, power plant noise and gas turbine silencing. He has developed suitable community noise criteria, designed noise controls for and/or verified facility acoustical compliance through specialized sound tests for several dozen multibillion-dollar power plants situated throughout the world. He has also designed noise abatement for many industrial, commercial and residential buildings. Mr. Parzych has been an invited speaker and author in conference sessions sponsored by the Acoustical Society of America and the Institute of Noise Control Engineering on noise modeling and measurements of power plants, industrial facilities and modeling the performance of sound barrier walls.

Prior to forming Power Acoustics, Inc., Mr. Parzych was a Senior Noise Control Engineer and Technical Group Leader of Acoustics in the Environmental Engineering group at Westinghouse Power Generation. From 1992 through February of 1998 he led the development of noise control and state-of-the-art research in modeling and diagnostics techniques. Mr. Parzych was responsible for the acoustical silencing and design of combustion turbines, aerodynamic source modeling of turbo-machinery noise, overall acoustical design of combustion turbine, steam turbine and cogeneration projects and environmental modeling to determine community impacts and worker noise exposure.

From 1983 to 1992, Mr. Parzych gained experience in aircraft noise through an intensive effort to develop a quiet counter-rotating Prop-Fan aircraft engine as an Analytical Acoustical Engineer at United Technologies Corp., Hamilton Standard Division. Mr. Parzych has been an investigator on several NASA funded research projects involving acoustics and unsteady aerodynamics of propellers, Prop-Fans and wind turbines.

Mr. Parzych began his professional career as an acoustical engineer in 1982 with General Dynamics, Electric Boat Division in Groton, Connecticut working in airborne and structureborne silencing for the on-board nuclear power plants used in the US NAVY submarine fleet.

Bachelor of Science in Engineering, Acoustics, University of Hartford 1982, with continuing education in acoustics and noise control including aero-acoustics offered at the Catholic University in Washington D.C. and many seminars and conferences on acoustics and noise control.

  • Board Certified - Institute of Noise Control Engineering
  • Licensed Professional Engineer, State of Oregon, with specialty in Acoustical Engineering (PE18940)
  • Full Member Acoustical Society of America
  • Principal/Firm Member National Council of Acoustical Consultants
  • Full Member ASME
  • Full Member ASTM
  • Chairman of ANSI B133.8, subcommittee 7, Gas Turbine Installation Sound Emissions (1997-2000)
  • Member of ANSI B133.8, subcommittee 7, Gas Turbine Installation Sound Emissions (2000-2008)
  • Member ASTM E33 Committee on Environmental Noise (current)
  • Chairman ASME Codes and Standards Committee PTC-36 “Measurement of Industrial Sound” (2012-2015), Vice Chair (2015-2021)

Dave Parzych has worked on many legal cases as an Expert Witness and has provided testimony for several trials, hearings and many depositions.

Patent Number 5,709,529, January 20, 1998, “Optimization of Turbomachinery Harmonics”

Dave has written dozens of technical papers for various organizations on noise prediction, analysis of sound, community noise case studies and specialized sound measurements. A listing of his papers, as well as PDF copies of some of the them, can be found on our Publications web page.