Abstract
To create a quiet environment inside buildings, it is necessary to decrease the noise level, which partly originates from electromechanical devices. This study explored a method for designing an acoustic enclosure for projectors that generate noises in a wide band frequency range. The source of noise in projectors is their fans, which cause the structure borne and airborne noise. Fans are required in projectors that use lamps as an illumination source to dissipate the heat emitted from their lamps. Sound measurements were performed to determine the frequency range that is generated by the projector. Based on the data obtained from the measurements, the sound level of the projector and the design of the enclosure were studied. Another aspect of this project was to find a way to cool down the projector while it was operating in a completely sealed enclosure. Based on the information about the power consumption of the projector and the temperature range that the projector can safely operates under, the cooling system was proposed. Finally the sound and temperature measurements were performed on the fabricated prototype of the enclosure to evaluate its functionality.
Keywords
Acoustical Enclosure, Projector, Sound Attenuation, Passive Noise Cancellation
Date of this Version
6-10-2013
Department
Mechanical Engineering Technology
Department Head
Kenneth A. Burbank
Month of Graduation
August
Degree
Master of Science
Head of Graduate Program
James L. Mohler
Advisor 1 or Chair of Committee
Richard M. French
Committee Member 1
Nancy L. Denton
Committee Member 2
Vahid Motevalli