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Eckel_Pix_2_042(left)Eckel Anechoic Chamber Wedges

 

Chamber Design and Application- 

Eckel Industries Inc. designs, fabricates and installs full and hemi-anechoic chambers to precise specifications for many industries and applications. We design chambers for government, institutional and industrial laboratories and testing facilities; and for industries including automotive, high-tech, energy, telecommunications, consumer products, audio & aircraft/aerospace. 

Echo-Free Enclosures-

Anechoic Chambers are echo-free enclosures with a sound energy absorption level of 99% to 100%, or a reflected sound pressure level of 10% or less. The frequency at which the energy absorption drops below 99%, or the pressure reflection exceeds 10%, is known as the low-frequency cut-off.

(left) An Eckel hemi-anechoic chamber used for automotive testing

 

Sound absorption is obtained by lining the walls, ceilings, and floor with wedges or other sound absorbing elements or SuperSoft panels, depending on performance level required and cut-off desired.

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Full Anechoic Chambers

FULL ANECHOIC CHAMBERS are engineered acoustical structures that simulate "free field" conditions, where the walls, floor or ceiling absorb 99% to 100% of the incident sound energy. These chambers are constructed with noise attenuating outer structures of masonry or modular panels and have all interior surfaces lined with anechoic wedges. (Right: Anechoic Wedges)

 Full anechoic chambers have working floors constructed of spring tension cable mesh or grating floor sections to support heavy test specimens above the floor wedges.

These chambers are used for sound measurements in a wide variety of research and development applications such as analysis of patterns of noise for loudspeakers, microphones and electrical components, telecommunication & computer equipment, as well as clinic audiological research.

 

 

 

Hemi-Anechoic Chambers

HEMI-ANECHOIC CHAMBERS have acoustical treatment on the walls and ceiling only and feature hard floors with no acoustical treatment. The solid floor of the hemi-anechoic chamber is common for testing large and heavy equipment such as automobiles, construction equipment, ATV's or white goods and appliances such as refrigerators, washers and dryers, where the normal mode of operation is over a reflective plane such as a floor or hard road surface. .

Arctic_Cat (left) A Hemi-Anechoic Eckel design

 Both Hemi-anechoic and Full anechoic chambers can be used in combination with reverberation rooms for transmission loss studies for car body panels and even the noise attenuating characteristics of aircraft fuselage construction

 

Features- 

Eckel chamber designs incorporate sound attenuating features such as isolated floors, light and power connections, ventilation, temperature and humidity control, instrumentation sleeves, control supports, working floors as well as single or double sound doors. All of our chambers provide a fully integrated acoustical testing & evaluation facility. 

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(Left) An Eckel single leaf anechoic sound door

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quietest Place on Earth : Orfield Labs' Anechoic Chamber -An Eckel Industries chamber!

The anechoic chamber at Orfield laboratory in Minneapolis, MN is NIST certificate and was designed engineered and constructed by Eckel Industries. This chamber is "The quietest place on earth" according to the Guinness Book or World Records 2005. The ambient noise level was measured at -9.4dBA (typical chamber run 15 - 20 dBA).

                (Below) Orfield Labs' Anechoic Chamber which is Guiness Records Certified as the Quietest Place on Earth.

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