Microperforated Wood Materials -- entered the market about 15 years ago. They typically have veneered faces with densely packed sub millimeter holes (up to 30,000 per sf) which from a few feet away are barely visible to the eye. This is applied to an MDF core with supplemental absorption behind the panel. The absorption mechanism uses a hybrid boundary layer and Helmholtz principal. The sub-millimeter holes act as escape ports for compressed boundary layer air. When a sound wave compresses the air against a microperforated surface, 52 I designsolutions spring 2020 the air pressure reaches a point where it's easier for it to enter the perforations than to continue compressing. This creates viscus losses leading to absorption. The material requires supplemental absorption behind the panel. NRC range 0.8 - 0.90. CURRENT VARIETY The current state of the art in acoustic wood materials is 'all-in-one' microperforated wood requiring no additional absorptive materials behind the panels. The panel core is fully exposed to the face holes. NRC range 0.8 - 0.9. The architectural woodwork industry is seeing a variety of these types of products from manufacturers partnering every day with design professionals, woodwork companies, material sciences and acoustic engineers to develop and manufacture both visual and acoustic wood solutions. These innovations are elevating today's possibilities to achieve our industry's vision of world class design.