Portable Anechoic Chambers provide the necessary environment for conducting a wide variety of acoustic studies, from improving product performance, to quality control of components and systems, and for developing products with lower noise output.

Applications of these chambers include:

• Noise studies of small electronic, electrical, and mechanical equipment
• Calibration of microphones
• Free field response testing of loudspeakers
• Determination of hearing aid characteristics
  Behavior studies of small animals

These high performance chambers are available in a range of sizes, with low frequency cuttoffs from 150 Hz.
A line of standard models is offered, with various optional equipment available.

Features

	Outstanding Acoustic Performance The sound attenuating enclosure is lined with pre-tested anechoic wedges, as is the access door. In addition the floor system is non-reflective. This makes for an easily maintainable sound absorption level of between 99% and 100% inside the chamber.	Easy Installation Standard Models are prefabricated in sections that are lined and fitted with accessories. These sections pass through a regular door, and require only bolting for final assembly and use. Units can be quickly and safely moved to any area where they are needed
	Economical The chambers are engineered for long term operation. Acoustic and structural integrity is kept over the years.	Flexibility Provision for external electrical connections is standard.

Construction

• The sound attenuating enclosure is lined with pre-tested anechoic wedges, as is the access door. In addition the floor system is non-reflective. This makes for an easily maintainable sound absorption level of between 99% and 100% inside the chamber.
• The cabinet is fabricated of 3/4" waterproof plywood reinforced with 2" x 4" external framing and 14 GA. corner steel angles for the models through 666-250-3. The larger models in the 888 series are constructed with an outside cabinet of Eckel's patented acoustic modular panels. Corners at section joints are further reinforced with steel gussets. To prevent acoustic leaks, section joints are splined.
• Anechoic wedges are mounted on the interior surface of the cabinet. Wedges in low frequency cutoffs of 150, 200, and 250 Hz are available. They are constructed of fibrous glass with metal bases and have individual point protection. The wedge covering depends upon the model selected.
• Standard doors are 25" wide by the heights of the free field, and feature heavy-duty hardware, neoprene gaskets, and hinges for 180 degrees of swing. Wedges are mounted directly on the door and swing completely clear of the opening when the door is swung through a 180 degree arc.
  
  Two 1" IPS sleeves are furnished, as well as a light fixture.
  
  Exterior surfaces are primed and painted with off-white enamel on wood cabinet models; metal panel cabinets.