On Tuesday, July 30, 2002, at 06:45 AM, G GRAVINA wrote: > Folks, > > If one were to set up such a study, what other parameters, controls, > frequency of data collection, length of study, etc., should be > considered? > > Jerry Gravina, RPT > Babylon, NY I think one would first start by reading the available literature, starting with articles in the Journal. There was an article by Don Galt a few decades ago in which he tracked humidity and pitch variations between a "control" piano (ie no system) and one with a DC system. I think they were the same model, in school practice rooms. There were more recent articles, some written by DC principals. It's pretty clear that they use good methodology. A couple years ago Roger had a "data loggers" demo at the CyberCafe (last day of the Institute). There's very sophisticated, very reasonably priced, equipment for tracking humidity and temperature at a wide range of intervals (from seconds to weeks between readings), with accompanying software [PC only, not for Macs :( ] which can graph the data. I'm sure Roger would be willing to share the details with someone interested in reduplicating his studies. On your own dime, no doubt. Perhaps a good science fair project for your kids, or a research project for a wood technology major. Patrick Draine
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