Quiet Rooms provide a controlled acoustic environment to conduct noise evaluations on a product or specimen without the interference of outside noises and vibrations. Typically used on factory plant floors or in-plant labs, eNoise Control Quiet Rooms are specifically engineered for high sound-transmission-loss and sound-absorption ratings which provide excellent noise reduction characteristics.
Hemi-Anechoic Chambers provide an essentially free-field environment over a reflective plane (the floor) for the measurement of hemispherically radiated sound waves emanating from a sound source. Both types of chambers are well suited for rating sound output, and for providing directivity information.
Anechoic Chambers provide an essentially free-field environment for the measurement of spherically radiated sound waves emanating from a sound source. 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. Sound absorption is obtained by lining the walls, ceilings, and floor with wedges or other sound absorbing elements, depending on performance level required and cut-off desired.
eNoise Control, 297 North 9th Street, Noblesville, IN 46060