Alpenföhn Föhn 120 Wing Boost Fan Review

👤by James Clewer Comments 📅28-05-10
Testing


We will be comparing the Föhn 120 Wing Boost to a selection of the other fans we've tested.

I used the sound pressure level meter below to test the dB rating of the fans at 12V, 7V and 5V.


The sound meter used for testing.


Due to the sound level meter only registering a dB rating of 50dB+ I will have to adjust the sampling distance to allow the fan to register on the meter.

I decided to test the fan at each rated voltage at a distance of 2.5cm. Since this can introduce some proximity based noise issues I positioned the meter off centre and as far away from turbulence as I could manage.

When the data is complete I will use a 'damping of sound level with distance' calculator to work out the dB rating for a greater listening distance. This will give a clearer understanding of the actual volume of the fans we have here.

For testing I used a hotwired ITX PSU which is a fanless silent model. This will provide power for the fans without producing any noise interference itself.


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