In recent years, laptop fan blade density is increased continually to provide higher
pressure capability which could be used to overcome high system impedance inside a
slim laptop system. This dense design pushes the acoustic energy emission toward to
high frequency range. Typically, a laptop fan is designed with uniform blade thickness
and uniform blade-to-blade interval distance, which generates period flow pattern
when fan is operating. This periodic flow filed characters and high frequency acoustic
energy emission leads to annoying high pitch noise and impact customers’ experience.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Share Alike 4.0 License.
INC, HP, "FAN WITH VARIOUS BLADE THICKNESS", Technical Disclosure Commons, (May 11, 2021)