4. Re: Foam for SASS

["John Crockett" naturalcontemplative]

Hmmm. By this test, my green foam fails. Using a SPL meter, I am measuring =
about 1dB per inch attenuation of a 2 kHz signal. Maybe I need to keep look=
ing for the right foam. I'm not confident this green stuff is going to adeq=
uately separate the channels.

John Crockett
Westminster, Vermont

--- In  Paul Jacobson <> wrote:
>
> The SASS patent indicates that the foam for the nose should attenuate fre=
quencies above 1200hz by at least 3dB per inch. All you need to do is test =
for that property.
>
> cheers
> Paul
>
> On 12/07/2012, at 5:42 AM, Peter Shute wrote:
>
> >
> > It would be good if someone could come up with an objective test for id=
entifying this stuff. I was told I should be able to blow through it, but w=
ith more difficulty than with medium density foam, which I wouldn't call an=
 objective test unless I had several samples to compare.
>
>
>
>