Quietly Superior, Inc. (dba J R Engineering) has been involved in a variety of acoustical fields since 1984. 

Architectural Acoustics -- creating quiet indoors

• Acoustical Privacy in Multi-Unit Housing and Offices

• Uniform Building Code Compliance

• Sound Transmission Class (STC) field testing and analysis

• Sound Isolation Class (IIC) field testing and analysis

• HVAC Noise control

• Room Acoustics -- echo and reverberation control

Environmental Acoustics -- creating quiet outdoors

• Noise Surveys, Noise Contours

• HUD and local land use requirements

• Noise code compliance and mitigation

• Air conditioners, generators, fans

• Cellular phone towers

• Industrial and commercial operations

Aircraft Noise Testing and Certification

• We specialize in making aircraft quieter when required and demonstrating compliance with noise regulations to the FAA or other cognizant authorities

• FAA/DOT approved instrumentation, software and methodology

• On staff: Designated Engineering Representative (DER), Acoustics Appointed by FAA

• More than 30 acoustic flight tests

• Certification of Repairs and Modifications

• We design quiet aircraft interiors

• Custom interiors

• In-flight cabin noise surveys

• We provide community noise contours using FAA Standard Integrated Noise Model (INM)

Aircraft Performance Testing, Analysis and Certification

• On staff: Licensed Professional Aeronautical Engineer

• On Staff: Flight Analyst (performance) DER

We have worked with several companies developing noise suppressors (hush kits) for a variety of aircraft, including the Gulfstream G-II, Boeing 727 and 707 and McDonnell-Douglas DC-8. In addition to hush kitted aircraft, we have worked with companies, such as Gulfstream and Embraer, on certifying new aircraft.

We have also worked with numerous developers and architects to provide a variety of architectural and environmental acoustic analysis from 24-hr. noise surveys for new construction sites to room acoustic analysis (such as STC, IIC) for existing residential complexes.

J R Engineering, based in Everet, Washington, is available for consultation as to the most timely and cost effective measures that might be considered for the elimination or control of unacceptable noise levels.

Click on the links to find out more about our company and how we can assist you.

Why J R Engineering?  J R Engineering's History  Environmental Issues  Architectural Acoustics  Aircraft Interior Noise

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