[Park Seward]

Originally posted by clorox:
The trumpet with a mute shows significant energy up to 100 kHz before dropping into the noise floor.

<font size="2" face="Verdana, Arial">Interesting that the big band recordings of the 40's were made with ribbon microphones with a top end of 15k (-6db). But the muted trumpet still sounded like a muted trumpet.

(Spec from the RCA 44BX factory spec sheet http://members.iinet.net.au/~vk6ft/micman/rca44bx.pdf)

Please list your reference as to the amount of energy the 100kHz harmonic has referenced to the fundemental tone. you state "significant energy". How significant?

Sibilance in human speech has been shown to have energy above 40kHz.

<font size="2" face="Verdana, Arial">I was not talking about sibilance, I was talking about the human voice. The voice has no energy at 40k! I believe it is physically imposible for the membranes to vibrate that fast! Sorry I don't have a reference.

Playing an A on your guitar will be producing a sound wave at 440Hz, but there are also many higher harmonic tones which may be out of the range of your hearing! Without these harmonics, that note would sound like a 440 Hz sin(e) wave.

<font size="2" face="Verdana, Arial">If the "tones" (harmonics) are out of the range of human hearing, then how do we hear them???