Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!desnoyer
From: desnoyer@Apple.COM (Peter Desnoyers)
Newsgroups: comp.misc
Subject: Re: Computer Virus Hearings
Message-ID: <32399@apple.Apple.COM>
Date: 13 Jun 89 17:45:48 GMT
References: <1340@jato.Jpl.Nasa.Gov>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 27

In article <1340@jato.Jpl.Nasa.Gov> morris@jade.Jpl.Nasa.Gov (Mike Morris) writes:
>In article <32205@apple.Apple.COM> desnoyer@Apple.COM (Peter Desnoyers) writes:
>>
>>I was recently at an event billed as an "art performance" where the
>>sound system ... [was playing music & possibly intercepted cellular calls]
>>
>Probably cordless phones.  Most of the cheap wireless microphones (and even
>some of the expensive ones) use 45-50mhz, 152mhz, or 158mhz.  The cordless
>phones use 46 & 49mhz channels, and the older IMTS mobile phones have 6 channels
>in the 152-158 mhz range.  Since the wireless mikes have low power and rotten
>antennas, and are built to a price rather than to a performance spec they need
>sloppy, broad and sensitive (but selectivity costs money) receivers.  Hence
>the receivers pick up everything when the mikes are turned off between numbers
>(to save batteries).  Somebody forgot to tell the sound man to shut off the
>wireless mike channel when it wasn't being used.
>
>US Snail:  Mike Morris                    UUCP: Morris@Jade.JPL.NASA.gov 
>           P.O. Box 1130                  Also: WA6ILQ
>           Arcadia, Ca. 91006-1130
>#Include disclaimer.standard     | The opinions above probably do not even

Nah. It was clearly intentional - the phone calls were mixed louder
than the background music. When the music went away for the
performance, the phone calls went away. Some of the phone calls at the
end of the show had been put through a tape loop.

				Peter Desnoyers