Fitting conventional silencers to this fan extract system seemed a long-winded and crude process to Red Bull who were used to the pace of change and the engineering innovation found in Formula One. Our approach was a perfect fit for their engineering ethos – 1000x less noise installed within a pit-stop of a few hours.
High speed fan noise reduction
Red Bull found an alternative to traditional attenuators in our Quiet Fan aerodynamic noise control technology. The aerodynamic inserts were designed, manufactured and installed inside the fan casing within a pit-stop window of just a few hours to dramatic effect.
The problem 218Hz low-frequency tone was reduced by a factor of around 1000... This reduction of 30dB set a new record for our innovative technology, completely eliminating the problem at the source for the lifetime of the fan, without maintenance and without affecting fan efficiency.
“We felt that there had to be a better way to reduce the fan noise other than by compromising the system efficiency and creating additional long term maintenance” said Terry Brice of Red Bull Technology.
“The INVC technique not only produced a fantastic result, but it’s also very satisfying as an elegant engineering solution”.
This low-cost source control technology is best practice for fan noise problems of this type, simultaneously cutting noise from the outlet, the inlet and breakout through the fan casing.
