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High frequency noise limits in products

Noral D. Stewart noral at ix.netcom.com
Tue Nov 26 20:53:16 EST 1996

bobj wrote:
> My apologies in advance if this is somewhat off topic but - Does anyone
> know of any specs or recommendations on maximum limits for high frequency
> noise  (>10 KHz) that consumer products can emit? TV sets sometimes emit
> 15KHz noise from the horizontal sync transformer and computers can generate
> audio noise from disk drives. Any answers, literature recommendations or
> pointers to more appropriate newsgroups would be appreciated. TIA.
> Bob J.

I am adding this to alt.sci.physics.acoustics.  Some of the computer or 
product noise people there may know.  The high pitch tone from tv and 
computer monitors is normal and not noticed by most people.  However, 
some people, usually women, are particularly sensitive to this.

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