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Re: recording the big storm in Muir Woods

Subject: Re: recording the big storm in Muir Woods
From: "Dan Dugan" dandugan_1999
Date: Sun Jan 6, 2008 12:06 pm ((PST))
Rob Danielson wrote:

>The sense of scale is fantastic.

Thanks! Spaced omnis (EM-23s) with barrier (me). Equalized for 
flatter HF response with a standard curve I use. The windscreens 
being soaked probably took a lot off the top.

>There are a couple of passages where
>I can feel a very thrilling, low Hz resonance-- particularly at the
>beginning and at 2:00 mins, around when the branch falls. If you can
>hear this, do you think this could be some standing waves in the
>canyon?

I was facing across the canyon. The trail splits making an island of 
the Grove, and I record on the side away from the creek (by the 
memorial plaque) so the creek doesn't dominate.

Because of the danger I wasn't monitoring--I wanted my directional 
senses fully available for dodging. I heard a low-frequency roar 
above me and to the left. I was puzzled by that, as I was in the 
tallest trees. I wondered if it could be the surf from the 
ocean--it's a usually inaudible background in Muir Woods from around 
two turns about 3.3 miles down the canyon, but one night when the 
surf was up it was a lot louder.

In the clip the low rumble is particularly audible to me between 
gusts 2-3 and 3-4, and leftish.

I don't think you can have standing waves in a V-shaped canyon.

-Dan




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