Hi Chris,
    Thanks very much for the interesting information pertaining to the 
various detectors and Infrasound detector arrays.  Unfortunately, I am restricted to 
a rather narrow outside rectangular area ( about 2' x 25') for my detector 
and porous hose layout, hence the linearity of the configuration.  Yes, it would 
be ideal to use radial arms and/or a circular configuration to supress 
ambient noise but I have to work with this restriction, at least for now.  I was 
advised to use a 1 Hz HP filter, and recorded in this mode for about a month 
before removing the filter.  I believe it eliminated too much of the lower 
frequencies that enriched the Infrasound signal.  
     I have had some good correlation with weather fronts and barograph 
changes.  I also recorded what appeared to be Infrasound correlation with solar 
radiation storms several months ago, but have not had the time to make further 
attempts at this or other correlative studies.  I will keep you advised if I 
come up with anything interesting, solar or terrestial!
    Best regards,
    Al 




Hi Chris,
    Thanks very much for the interesting informa=
tion pertaining to the various detectors and Infrasound detector arrays.&nbs=
p; Unfortunately, I am restricted to a rather narrow outside rectangular&nbs=
p;area ( about 2' x 25') for my detector and porous hose layout, hence=20=
the linearity of the configuration.  Yes, it would be ideal to use radi=
al arms and/or a circular configuration to supress ambient noise but I have=20=
to work with this restriction, at least for now.  I was advised to use=20=
a 1 Hz HP filter, and recorded in this mode for about a month before removin=
g the filter.  I believe it eliminated too much of the lower frequencie=
s that enriched the Infrasound signal.  
     I have had some good correla=
tion with weather fronts and barograph changes.  I also recorded w=
hat appeared to be Infrasound correlation with solar radiation storms s=
everal months ago, but have not had the time to make further attem=
pts at this or other correlative studies.  I will keep you advised if I=
 come up with anything interesting, solar or terrestial!
    Best regards,
    Al