We put most of the rough pumps in a basement and had them draw on a
large-diameter pipe that runs through the mass spectrometry room.  The
turbo's are still integral to the machines, but your building engineers
should be able to suggest a roof or wall tile that will cut down on their
high-frequency noise.

John Eiler
Caltech

>Hello Isogeochemists-
>I'm looking for any advice out there on reducing vacuum pump noise in a mass
>spec lab.  What has been tried?  Is carpeting the best solution?  Thanks for
>any help you can provide.
>Julie
>
>
>Julia Cox
>University of Arkansas
>Stable Isotope Laboratory
>Dept. of Biological Sciences
>117 Ferritor Building
>Fayetteville, AR  72701
>Phone: 501-575-2543
>Fax:  501-575-8434
>http://biology.uark.edu/uasil/home.html