arnyk wrote: > Many different music instruments create acoustical signals > 20 KHz. > Cymbals are actually not the best sources of ultrasonic sound, their > energy is typically concentrated in the 6=16 KHz range. Many tambourines > will vastly outproduce cymbals when it comes to ultrasonic sound waves. > Depending on their construction details, shakers are at least as > vigorous producers of ultrasonics - many aren't audibly that loud > because most of the energy they produce is ultrasonic. Certain brass > instriuments such as a trumpet with a Harmon Mute are vigorous producers > of sound up to 100 KHz and beyond.
Interesting discussion, but I'd point out that even with respect to the instruments noted above, the loudness of the higher frequencies and harmonics is already quite low compared to the volume of the fundamental frequencies. Then, add on the issue of absorption of high frequencies with distance, and in most live acoustic concert situations, no one in audience could hear those high frequencies even if their hearing was capable -- between the reduced output of the instrument at high frequencies and the air absorption, any energy in that range will likely already be lost in the ambient noise floor. The above goes double for any amplified concert, as the microphones and PA system will add their own frequency limitations to the above. I suppose that if one were trying to create a recording in which the listener is sitting in the musician's chair or sitting across from them in a living room, then the ability to record above 20KHz might mean a bit more. But for me, I've never found the high frequency limitations of the CD format to be a source of concern with respect to my listening pleasure. ------------------------------------------------------------------------ mlsstl's Profile: http://forums.slimdevices.com/member.php?userid=9598 View this thread: http://forums.slimdevices.com/showthread.php?t=106593 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
