The sound emitted when the air handling unit (AHU) starts up can make it hard for students to hear instruction or create a distraction for students trying to focus.
Kevin Herreman, principal acoustic scientist at Owens Corning, discusses the problems posed by industrial noise and shares some research on models to more accurately predict insertion loss in the latest installment of the Blueprint.
Evapco conducted tests on four of their cooling tower units using multiple standards to calculate and compare sound power levels. Here are the results.
