Get her to switch off the power to her house and see if the sound
disappears. It's a quick test and will quickly narrow it down to "us"
or "them".

Cheers,
Zik

On 9/6/06, Mike Singer <znatok@gmail.com> wrote:
> Jinx  wrote:
> > A friend has been giving me grief for some
> > few weeks about noise she says is coming
> > from a microwave tower about 300m from
> > her home
>
> I'm sure she is not able to determine the direction of the ultrasound,
> until, of course, she is a bat.
> I am not about getting into  RF version here.
>
> Most probably the sound is emitting inside her house.
> It could be some old swollen battery or accumulator (say, from
> cellphone) emitting air through the micro-hole or something similar.
> It's hard but still possible to locate the aprox place in the room
> where sound is at max amplitude on average.  Here she is to seek the
> little screaming creature.
>
> Regards,
> MS
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