Planar binary amplitude diffusor
AssigneeRPG Diffusor Systems, Inc.
InventorPeter D'Antonio
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Abstract
A two-dimensional binary amplitude diffusor (BAD) offering both absorption and modest diffusion is disclosed. The invention consists of a flat-faced panel with a series of alternating reflective and absorptive regions or patches defined by a binary sequence consisting of zeros and ones with a flat power spectrum, such as the Maximum Length Sequence (MLS) based upon shift register theory. Combining regions of absorption and reflection in the manner described herein results in an effective combination of absorption and diffusion.
Claims16
An acoustical device, comprising:
- a) a generally rectangular body having a length, a width and a depth;
- b) said body having a flat generally rectangular forward facing acoustical surface substantially defined by said length and width;
- c) said acoustical surface having a plurality of discrete reflective regions and a plurality of discrete absorptive regions arranged in a pattern, said regions being arranged in accordance with calculation of a binary sequence having a flat power spectrum.
A method of making an acoustical device, including the steps of:
- a) providing a generally rectangular body having a length, a width and a depth;
- b) providing said body with a flat generally rectangular forward facing acoustical surface;
- c) arranging, on said surface, a pattern consisting of a plurality of discrete reflective regions and a plurality of discrete absorptive regions arranged in accordance with calculation of a binary sequence having a flat power spectrum.
Dependencies are inferred from the claim text.