Rocktown SPL Posted June 29, 2014 Report Share Posted June 29, 2014 Check this facility out at NASA Goddard: And this one, The RATF at the Space Power Facility at NASA's Plum Brook Station in Sandusky, Ohio: Arkansas Based Car Audio Bass Music & Test/Competition Producer Now Streaming worldwide on: Spotify Link to comment Share on other sites More sharing options...
Rocktown SPL Posted June 29, 2014 Author Report Share Posted June 29, 2014 "The RATF chamber is located within the Vibroacoustic Highbay, taking advantage of the 1.8 m (6 ft) thick surrounding concrete walls to help attenuate sound migration through the SPF. The highbay also serves as redundant protection from the RATF nitrogen atmosphere during operation. The RATF is a 2,860 m3 (101,189 ft3) reverberant acoustic chamber capable of achieving an empty-chamber acoustic overall sound pressure level (OASPL) of 163 dB. The facility structure is designed for a future upgrade to 166 dB OASPL, including areas in the horn room wall which have been left blank for future installation of additional modulators/horns. The RATF includes various supporting sub-systems including gaseous nitrogen generation system, horn room with acoustic modulators and horns, acoustic control system, and hydraulic supply system. Test articles are mounted onto elevated customer-provided mounting fixtures for testing. The chamber has been constructed with load-bearing wall attachments for future installation of a 5-ton interior bridge crane. The chamber can be operated as a Class 100,000 clean room once the access doors are closed and the facility is cleaned. The combinations of servo-hydraulic and electro-pneumatic noise modulators utilize gaseous nitrogen capable of producing a tailored wide-range of acoustic spectrums in the frequency range from 25 to 10,000 Hz. The RATF chamber internal dimensions are 11.4 m (37.5 ft) wide by 14.5 m (47.5 ft) deep by 17.4 m (57 ft) high." Arkansas Based Car Audio Bass Music & Test/Competition Producer Now Streaming worldwide on: Spotify Link to comment Share on other sites More sharing options...
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