US Enclosure Company
Manufacturer of custom enclosure wall materials that can be manufactured curved shape loudspeaker cabinet. USA.
http://www.usenclosure.com/

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/

Neolithic Palisaded Enclosure at Hindwell
Illustrated, scholarly paper by Alex Gibson on the exceptional enclosure in Wales, based on a study by Clwyd-Powys Archaeological Trust. In English with abstract in German.
http://www.jungsteinsite.de/2000_gibson/hindwell.htm

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/

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/

Industrial Noise Control
Industrial Noise Control manufactures high performing industrial noise control materials, sound proofing and noise control products, acoustical panels, and dyno testing to solve the most common to complex noise control applications
http://www.industrialnoisecontrol.com

Caledonian Ferguson Timpson
Specialists in the design, engineering, manufacture and installation of industrial noise reduction equipment, including acoustic enclosures, noise absorbers, noise havens, acoustic doors and integrated ventilation systems.
http://www.caledonian-group.co.uk/

Active Noise Control for Smart Materials
Research results and software tools for using smart materials in active noise control. Active noise control and noise cancellation solutions for acoustic problems brought to you by Signal Systems Corporation.
http://www.signalsystemscorp.com/ancindex.htm