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The acoustic measurements accessed from this page were taken at or near the air intake area of the L-1 vertical wind tunnel located at Appalachian Amusement Center. This acoustic energy, or
noise, is produced by several sources. There is mechanical noise from the motor room and the rotation of the fan. There is noise coming from struts and supports not yet covered with airfoil shapes. Noise comes from
the air rushing into the machine. The fan blades themselves are a major contributor.
Noise emitted from the intake area is critical to site compatibility. Many locations will not allow a machine that generates
too much noise. A higher quality machine will produce less noise. A buyer should know how loud a machine will be.
The L-1 design is very quiet. This information demonstrates that.
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