Some Really Cool Speakers
Researchers at Georgia Tech
have come up with a novel localized cooling device that promises to replace the
ubiquitous CPU fan and other such applications. The
SynJet uses vibrating diaphragms (essentially speakers), driven
at 100 to 200 Hz, to force puffs of air out through openings in its cavities, and
through cooling fins. Efficiency and effectiveness are improved by using less current,
making less noise and lower vibration levels. The resulting puffs of air churn through
the thermal boundary layer that forms normally when a steady airflow is applied.
Innovative Fluidics has purchased a license for commercial exploitation, and plans
to sell the devices in 2005.