PSN-L Email List Message
Subject: Re: Caution on low pass filtering emphasis
From: RSparks rsparks@..........
Date: Mon, 04 Jan 2010 05:59:40 -0800
Thanks for the many comments.
My seismometer is located in my "Wine Cellar" which is semi sealed. I
do get wind noise but not too badly. Additional sealing would no doubt
help reduce the very low frequency noise I am seeing.
The instrument has a clear plastic cover sitting on three legs to
prevent any rocking. No sealing here.
About a month ago, I clamped the seismometer to the basement concrete
floor. I thought it reduced the high frequency noise a little but have
no obvious confirmation of improvement.
My boom hinge is a spring, and the joints all seem tight.
The daytime "fuzz" may be truck noise from the interstate two miles
distant. I will do a little more to try to correlate this noise with
dates, sunrise times, and weather.
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