Re: recording equipment for rockfall detection

["Dan Dugan" dandugan_1999]

Also on this thread I should mention that Yosemite NP has automated  
recording stations on site, at least two, I think. These can be  
programmed in various ways, but a typical pattern is to record  
continuous 1/3-octave analysis data, and periodic short full-range  
audio clips. They have weatherproof omni mics.

A huge library of data from these stations in many parks has been  
accumulated. There is a plan to publish all the 1/3-octave data on the  
Western Soundscape Archive site:

http://westernsoundscape.org/

Look at the examples posted there. I suspect you can do research on  
the data around the times of known rockfalls.

-Dan Dugan