I happened across this study about sound frequencies beyond 20kh. Harmonics (I prefer the term Overtones)
http://www.cco.caltech.edu/~boyk/spectra/spectra.htm Aside from the study’s purpose, skimming the text is fascinating, sends my/your inquisitive mind in many directions.
Think about your listening room when reading his extremely detailed measurements to ascertain/eliminate any external contributions to his measurements.
Check out the amount of sound energy beyond 20kh of various instruments, crash cymbals particularly revealing. Jangling keys also a surprise.
The comments about a Piano’s Altered Harmonics including the strings/sound board/floor, I found surprising. I’ve always known how difficult it is to record a piano, this must be part of the challenge.
Even though test subjects say they cannot hear the super tweeter, experimenters could measure that the super-frequencies were detected by ..... , awareness and the brain’s perception ability are different things
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Overtones. ’Analog Gets the Overtones Rght’.
I’ve often said, after a whole lotta years, the only way I can begin to explain why I prefer analog, is ’Analog Gets the Overtones Rght’.
Reel to Reel, my noisiest format, is my most preferred source. LP favored over CD. Tubes over SS. Myself, and ANY/EVERYBODY listening here to comparisons over the years has the same preferences.
More reason to get our ears professionally cleaned!!
Elliott
