[Scott Dorsey]

William Sommerwerck wrote:
"Scott Dorsey" wrote in message
...

And even if it isn't bull****, as soon as you put the fan in the
cabinet where there is turbulant airflow, the noise from that
will be louder than the noise of the fan itself.

Isn't it "assumed" that the fan noise includes the sound of the turbulent
airflow? In a sense, the airflow _is_ the sound of the fan.

That measurement is almost certainly made in free space, with nothing
other than the fan to constrain the airflow. Put the fan in front of
a heatsink and you now have lots of noise from the air on the heatsink.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."