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Fairey Rotordyne


Julien

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  • 3 weeks later...

A quote at the time was the noise was reduced from painful to unbearable. I believe it was something like 60dba at 200 metres in the 1k band. To put some context the dba scale is exponential and the average noise of an open plan office is 25dba in the 1k band at 1m.

 

Tommo.

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