![]() ![]() This bending varies by the wavelength of the sound and the size of the object in encounters. Unlike light, acoustic energy is the physical fluctuation of pressure changes – which gives sound the ability to travel around corners. ![]() Diffraction is what happens to sound when it hits a corner or edge. There is another phenomenon that helps to contribute to diffusion – and that is diffraction. Note that the Double Duty™ (barrel) scatters across the curve of the face while the Pyramid throws energy in different directions. The Barrel is primarily a one-dimensional diffuser, and installs either horizontally or vertically. This allows the pyramid to be installed in complex arrays which create more “random” reflections due to their different facet angles. However, the pyramid’s facets are all angled slightly differently – reflecting in different directions. The barrel primarily scatters sound across the curve of the face – sending acoustic energy in a wide arc. Their differences begin with this fundamental variable – the pyramid has angled planes and the Double Duty™ is a large curved surface.Īnother simple difference is the fact that the Double Duty™ is symmetric and the offset pyramid is asymmetric. The pyramidal is, in this case, a modified/offset pyramid… a pyramid without equal sides. These shapes are often referred to as “primitive.” The barrel, in its basic form, is a truncated cylinder – basically a segment of the cylinder. Both of these shapes have been used in architecture for the expanse of human history, and their acoustic properties have been studied in numerous environments, in many different applications. The barrel is also an ancient shape, born from the pillars of historic temples and gathering places. The pyramids of Egypt may not have been renowned for their acoustic properties, but they certainly show the historical age of this shape. These two shapes have origins before written history. How did they come about? Why do they work? How are they different? The Pyramid! These two shapes are the historic foundations for modern acoustic treatments. For this installment of “Similar, yet Different”, we will be going retro – The Barrel Vs. ![]()
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