Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!seismo!rochester!pt.cs.cmu.edu!unh.cs.cmu.edu!agn
From: agn@unh.cs.cmu.edu.UUCP
Newsgroups: sci.electronics
Subject: Re: Ultrasonic humidifiers
Message-ID: <1004@unh.cs.cmu.edu>
Date: Mon, 23-Feb-87 10:39:43 EST
Article-I.D.: unh.1004
Posted: Mon Feb 23 10:39:43 1987
Date-Received: Thu, 26-Feb-87 19:15:50 EST
References: <15214@onfcanim.UUCP> <555@pixar.UUCP> <7674@utzoo.UUCP> <252@lpi.UUCP>
Organization: Carnegie-Mellon University, CS/RI
Lines: 7

The warning concering ultrasonic humidifiers (and similar devices like
cleaners) is due to the extreme pressures of the sound wave in the water.
These pressures can be 20 bar and up (that's about 600 psi), which is
more than enough to damage cells mechanically. The net result is similar
to a burn or exposure to extrem cold (say liquid nitrogen).

That warning is real.   --   Andreas          agn@vlsi.cs.cmu.edu