Title :
Acoustic Noise Cancellation by Phase Alignment of Cooling Fans
Author :
Guthridge, Scott ; Harper, Richard E. ; Marr, Harry ; Abali, Bulent
Author_Institution :
IBM Res., Yorktown Heights, NY
Abstract :
With increasing power consumption of computer systems, faster and larger cooling fans are used and acoustic noise management becomes difficult. In this paper, we show that by locking a pair of cooling fan motors into a common frequency and 180 degrees out of phase, the dominant tone most perceptible by human ear can be reduced.
Keywords :
acoustic noise; cooling; fans; acoustic noise cancellation; acoustic noise management; cooling fans; noise reduction; phase alignment; power consumption; Acoustic noise; Cooling; Ear; Fans; Frequency; Humans; Noise cancellation; Noise reduction; Phase noise; Voltage control; Noise reduction; cooling; noise cancellation; power;
Conference_Titel :
Semiconductor Thermal Measurement and Management Symposium, 2007. SEMI-THERM 2007. Twenty Third Annual IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-09589-4
Electronic_ISBN :
1065-2221
DOI :
10.1109/STHERM.2007.352412
