Make sure your computer speakers can handle higher frequencies. If you felt some sort of pressure but couldn't hear it, then you probably 'felt' the sound pressure but couldn't hear it. _http://www.indiana.edu/~emusic/acoustics/ear.htm_ (http://www.indiana.edu/~emusic/acoustics/ear.htm) I'm not sure about concurrent frequencies, but from what I've read it is the cochlea which determines the frequencies which we can hear. The cochlea contains about 20,000 hair cells at birth - one for each frequency from about 16Hz to 20,000Hz. When we suffer hearing loss, usually it is a loss of the function of those hair cells. That's also why we can have a ringing in the ear at higher frequencies. Since we only have one hair cell per frequency - that may be why it's very difficult to determine two separate instruments at the exact same pitch and timbre even though we have a cochlea for each ear - and it may be why combinations of timbres at the same pitch can lead to some very interesting sounds. Just my two cents there. -William In a message dated 11/12/2010 4:09:18 A.M. Eastern Standard Time, [email protected] writes:
> > From: Michiel van der Linden wrote: > > Sure we can hear above 5000 Hz unless there is severe hearing damage. > It is however very hard to discern and name actual *pitches* in and above > that region. The way our neurons pass the information to our brain only > functions optimally up to 5000 Hz. > > http://www.newmusicbox.org/article.nmbx?id=4077 > Thanks for the link Michiel. A few paragraphs in, I found this "The ear, on the other hand, can separate up to a hundred different sound frequencies, corresponding to the number of frequencies that can be separated by the basilar membrane." Personally I feel "up to a hundred different sound frequencies" is a bit of an understatement. With 88 notes on a piano, and since most of us can differentiate a note which is more than a few dozen cents out, I'd have thought several hundred was not unreasonable. Is this writer reliable? Not everything on the WEB can be taken as gospel. I tried the sound test from an earlier post and though I couldn't "hear" the higher ones (as I could up to 12k) I felt a kind of pressure while the t racks were playing, particularly on the highest! Is this the note itself affecting me, or background noise from the track, I wonder. Anyone else notice this? Simon V _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/valkhorn%40aol.com _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/archive%40jab.org
