Marty Kasprzyk Posted March 10, 2017 Report Share Posted March 10, 2017 17 hours ago, Jim Bress said: Just thinking out loud again because I'm certainly not an expert in this field. If you're talking about the projection of an instrument, then you are referring to that instruments projection, i.e., how far the sound travels. Because blending or distinguishing your sound from an orchestra or ensemble is a moving target. Higher frequencies decay faster than lower frequencies (from ornithological studies). Therefore to quantify, projection you could record and graph open string bowing of each string at a close distance (e.g. 3rd row) and a far distance (back of the hall) and measure the rate of overtone decay over distance. From here a qualitative ranking system could be developed. An instrument that has a lower overtone decay rate would have greater projection, or carrying power, over an instrument of the same type that has a more rapid overtone decay rate. Of course the decay rate would only apply to that venue, but it would be something for your records to compare to future instrument and something empirical to show potential clients. Just my thoughts whether they're helpful or not, or even make sense. -Jim I very much agree that ornithological studies are helpful. Birds want to be heard in their habitat. The sound absorption characteristics of that environment determines the frequencies they use in their songs. Some birds living in dense foliage use high frequency songs which decay quickly with distance. Their communication range to other birds is small. Other birds use lower frequency calls which aren’t absorbed as quickly in the foliage. The projection is better and their range is larger. Both bird species exist so both high and low frequency strategies can be successful. If we consider mammal calls we see the same thing. Chimpmunks use high pitch calls and have close by friends and elephants use tow pitch calls and their range is over twenty miles. So projection distance is inversely related to frequency. And obviously loudness helps. But what I find fascinating is that these calls hardly ever have a constant frequency note. There always seems to be a simultaneous slide in pitch, a vibrato, and change in loudness. Variation seems to attract attention and gets noticed by a potential friend. So switching back to violin projection I suspect that a large amount of spectrum change that happens during vibrato playing is helpful. Loud is still good. Having the right frequency output for the chosen environment is import. I don’t know how to do these. Quote Link to comment Share on other sites More sharing options...
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