Happy Thanksgiving
Thank you all so much for the overwhelmingly enthusiastic reception of the inaugural monthly effusor Newsletter. The feedback has been very encouraging and I look forward to seeing those of you who have accepted our all expenses paid invitation to visit RPG. If you miss an effusor edition, all previous issues are now on line.

NCAC
To strengthen our industry, we encourage all acousticians to consider joining the National Council of Acoustical Consultants. RPG has supported the NCAC with our educational centerfold for many years. We invite you to read Diffuse Reflections Volume 11, Issue 2 and all online previous issues, as well as our view of the State of Our Industry.

New Product
RPG now offers a complete acoustically optimized Waveform ceiling canopy system consisting of the 1D Monoradial and Spline, the 2D Biradial and the 2", 4" and 8" deep Bicubics. The Waveform series is available in wood and Glass Reinforced Gypsum, with many damped and undamped options.

Continuing Education
RPG now offers a wide range of continuing education opportunities for acousticians. Please join us for our all expenses paid Acousticians Only Diffuse Seminar June 22, 2007. You can view the Agenda pdfs on line. Also we invite you to visit our Acoustics Library, Diffuse Reflections, Diffuse Bulletins and Competitive Evaluations.

Testing, testing....
RPG offers free acoustical testing to the acoustical community for the random incidence absorption coefficient, using our rev room (pictured) and normal incidence absorption coefficient, using our mid-high and low-mid frequency impedance tubes. We also can measure the directional absorption coefficient, the diffusion coefficient and the scattering coefficient, using our 2D goniometer. To learn the difference between the diffusion and scattering coefficients, study the measurements for our QRD 734 and

Product Evaluations
Over the past 23 years, RPG has discovered how to design, predict, optimize, measure and characterize scattering surfaces. Much of this research has been published in our recent book. Recently, a few companies have attempted to copy RPG technology. To keep acousticians fully informed, RPG has instituted a program to evaluate all of the products that claim to offer diffusion in our industry. To the left we show an image of a 1:5 scale optimized BAD template used in our goniometer for testing. Please visit our competitive product evaluations site for more information.

New Product
The new SIAP Mark IV represents the next generation in electronic architecture systems, offering the industry’s most powerful time constant reverberation processor. The standard system offers 4 mic inputs, 6 line inputs and up to 64 outputs with up to 128 programmable FIR filters, each with separate frequency dependent early and diffuse reflections, density and length. RPG will sponsor training sessions at our facility in the first quarter of 2007, so stay tuned!

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