German Federal Organization Against Aircraft/Airport Noise
Bundesvereinigung gegen Fluglärm e.V.
http://www.fluglaerm.de/bvf/

Environmental Protection UK
UK association of environmental protection specialists. Works on environmental protection and management issues including air quality and noise.
http://www.environmental-protection.org.uk/

Computer Noise Insulation Case
Beschreibung des Computer-Schallschluckgehäuses
http://www.carsten-buschmann.de/noise-protection/

Industrial Noise Control Inc.
Industrial Noise Control manufactures high performing industrial noise reduction and soundproofing products and structures used to solve the most common to complex noise control applications
http://www.industrialnoisecontrol.com/

Speech Technology Center
Speech Technology Center : voice recording,digital voice recorders,audio analisys,noise cancellation, noise reduction, DSP board, embedded solutions, voice identification, audio restoration
http://www.speechpro.com

Marshall Day Acoustics
Acoustics and noise engineering consulting firm that provides acoustical, environmental noise, and noise control design services, including concert hall and auditorium design, environmental noise assessments, and building services and industrial noise control.
http://www.marshallday.com/

Gear Noise Short Courses
GearLab - Gear Dynamics and Gear Noise Research Laboratory
http://www.gearlab.org

Associates in Acoustics, Inc.
Consulting firm in industrial noise measurement, engineering noise control and hearing conservation programs. Includes noise manual downloads and resource links.
http://www.esion.com/

Kinetics Noise Control
Control the transmission of noise, shock and vibration produced by mechanical, industrial or process equipment within or into a building structure with our isolation systems
http://www.kineticsnoise.com/hvac2.html

NoiseMeters.com
Sound level meters, noise dosimeters and environmental noise monitors. The online shop from NoiseMeters offers buyers professional advise on product selection.
http://www.noisemeters.com/