Noise Reduction from Shop Vacuums by the Application of Helmholtz Resonator.

Friday, November 7, 2014
Plaza Foyer (Sheraton)
Hoang Le , Tennessee Technological University
The effect of acoustic attenuation of a Helmholtz resonator is exemplified with a shop vacuum. By adding a tuned Helmholtz resonator, sound is reflected back to the source when air is blown over the open neck of the resonator, thereby reducing the sound pressure level at a certain frequency.