jsdy@hadron.UUCP (Joseph S. D. Yao) (01/07/86)
In article <1260@brl-tgr.ARPA> gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>) writes: >By the way, the fellow who got headaches in the room full of burning-in >monitor assemblies was probably being affected by the near-ultrasonic >sound generated by the horizontal circuits (often transformer laminations >vibrating). Even if he didn't consciously hear them, such whistles would >lead to irritability and headaches. I can hear them! (usually.) And also the cheap security TV cameras and TV's and sonar burglar alarms and traffic light detectors. How common is this phenomenon? When I've mentioned it, most people are surprised or doubtful; a few are surprised that everyone doesn't. -- Joe Yao hadron!jsdy@seismo.{CSS.GOV,ARPA,UUCP}
jcp@osiris.UUCP (Jody Patilla) (01/08/86)
> >By the way, the fellow who got headaches in the room full of burning-in > >monitor assemblies was probably being affected by the near-ultrasonic > >sound generated by the horizontal circuits (often transformer laminations > >vibrating). Even if he didn't consciously hear them, such whistles would > >lead to irritability and headaches. > I can hear them! (usually.) And also the cheap security TV cameras > and TV's and sonar burglar alarms and traffic light detectors. How > common is this phenomenon? When I've mentioned it, most people are > surprised or doubtful; a few are surprised that everyone doesn't. I can hear them too, and so can my brother but neither of our parents can, nor can most of our friends. It's odd for me, since my hearing is actually deficient in mid-range conversational tones. It is truly annoying and does not have any advantages that I've been able to discover, and just increases other people's opinion that our family is weird. -- jcpatilla "If we can send a man to the moon, why can't we send all of them ?"
tj@alliant.UUCP (Tom Jaskiewicz) (01/10/86)
In article <177@hadron.UUCP> jsdy@hadron.UUCP (Joseph S. D. Yao) writes: >I can hear them! (usually.) And also the cheap security TV cameras >and TV's and sonar burglar alarms and traffic light detectors. How >common is this phenomenon? When I've mentioned it, most people are >surprised or doubtful; a few are surprised that everyone doesn't. I hear them too. I especially remember the moon-rock display at the Smithsonian. The volume was so high as to be painful within 3 feet of the display. Most people seemed totally unaware of the sound. -- #################################################################### # uucp: decvax!linus!alliant!tj ## Bernese are mountains of love. # ####################################################################