home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge
- From: kludge@grissom.larc.nasa.gov (Scott Dorsey)
- Newsgroups: talk.bizarre
- Subject: Re: short shameful reality (was Re: How to kill chickens with your computer...)
- Date: 17 Nov 1992 03:20:44 GMT
- Organization: NASA Langley Research Center and Reptile Farm
- Lines: 19
- Message-ID: <1e9oecINNsnj@rave.larc.nasa.gov>
- References: <1992Nov14.220646.19477@walter.cray.com> <1e904tINNmut@rave.larc.nasa.gov> <1992Nov16.173728.7218@walter.cray.com>
- NNTP-Posting-Host: grissom.larc.nasa.gov
- Keywords: more musical than thou
-
- >>The 16 Hz note isn't really audible, but it's easily felt. It's definitely
- >>a strange sensation. Lower frequencies at louder volumes cause nausea, as
- >>a few electric bass players have found. (Incidentally some bass amps don't
- >>reproduce the fundamental, but primarily reinforce the second harmonic of
- >>many of the lower notes, but that's another story).
- >
- >Personally, the only thing I've ever heard of that sounded below that was
- >Galloping Gertie, the old Tacoma Narrows bridge. It caused a lot more than
- >nausea.
-
- From the films I have seen, I'd put it in the 2-3 Hz range. But, again,
- that's the wave as it propagates through the metal structure. While I am
- sure that it produced vibrations in the air at that same frequency, they
- would not propagate well (because low sounds propagate poorly through air),
- though they might propagate somewhat through the ground. Moreover, they
- would not be perceived as sounds but as a slow vibration, since the ear is
- not very sensitive to such lower tones (since it's actually producing the
- derivative of the pressure at the eardrum; it's a velocity sensitive process.)
- --scott
-