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City Council Minutes Page 7 <br />June 15, 2015 <br />----------------------------- <br />Picture #9 <br />One of the air intakes with sound deadener pointing toward the highway at a 60- <br />degree angle so that any noise coming out of the dyno’s are reflected off the roof and <br />toward the highway. <br /> <br />Picture #10 <br />Back of two dyno cells. <br /> <br />Mr. Wells stated the overhead door is the chassis dyno, which is where they work on <br />cars with the engines in the car. He stated the door has to be closed in order for the <br />cell to work because it has two – 20,000 cfm fans, one on each side, along with a 4x4 <br />duct in the ceiling. He explained how the air is drawn out by the fans. <br /> <br />Picture #11 <br />Same picture as #10 but close up. <br /> <br />Mr. Wells explained how the fans are designed for not allowing the sound to bounce <br />out. <br /> <br />Picture #12 <br />Engine dyno. <br /> <br />He stated this is the one that he got the first phone call, from an anonymous source, <br />about noise. He stated this is an enclosed cell with no door. He stated after the first <br />two complaints about noise back in 2007 he added the two mufflers and changed the <br />way the dyno cells go on the inside. He stated they work like a tom-tom drum. <br />They’re hollow and would inject the noise straight up in the air. He stated it has an <br />air extractor and sound deadener on it and pushes the sound down. <br /> <br />Picture #13 <br />Two 4x4 air intakes facing highway and with sound deadeners. <br /> <br />Mr. Wells stated this section of the building is only 14-feet tall while the back section <br />toward the houses is 24-feet tall. <br /> <br />Picture #14 <br />Chassis dyno with 650 horsepower supercharged Dodge Charger. Shown is one of <br />the 22,000 cfm fans, a booster fan on top, and a 4x4 air duct on the roof above. <br /> <br />Mr. Wells stated this door can’t be open because you don’t get the air passing <br />through it. He stated if the door is open, you get stagnated air with exhaust, and it <br />doesn’t work. He stated it is a 2” insulated door with seal. He stated the walls in both <br />dyno cells are 6” with FRP quarter inch on the inside, sound deadener, fiberglass <br />material and schraps protection inside a chain mail, and then they are sealed with a <br />required fire rock. <br /> <br /> <br /> <br />