"Joe" wrote in message ...

I noticed some black flexible ribbed hose used in a dust collection
accessories ad at http://www.rockler.com/product.cfm?page=11312&rrt=1 .

I tried some stuff that looks like it that is sold as drainage hose. It is
similar to
http://www.lowes.com/pd_259812-62059-51110_0__?productId=1239335&Ntt=corrugated+pipe+4 +inch&pl=1&currentURL=%3FNtt%3Dcorrugated%2Bpipe%2 B4%2Binch&facetInfo=
or
http://www.lowes.com/pd_24136-124-04510050H_0__?productId=3306084&Ntt=corrugated+pip e+4+inch&pl=1&currentURL=%3FNtt%3Dcorrugated%2Bpi pe%2B4%2Binch&facetInfo=
.

When used on a dust collector, the moving air across the ribs makes it
sound like there's a steamboat whistle in the shop.

Any chance you accidently have the variety with the weep slits? I imagine
they would make all kinds of sounds... ;~)