Orchid XP v7 wrote:
>>> Sounds wonderful, but...
>>> I'm not sure if speakers or any magnetic device would work in such a 
>>> strong
>>> magnetic field.
> 
> Well, it's not a stationary field, and it's well outside the audio 
> frequency range. And, indeed, if these dudes have out their science 
> right, the field is virtually invisible to anything that doesn't 
> resonate at just the right frequency.
> 
> [Hmm, I wonder what happens when several homes have these, and their 
> frequencies clash?]
> 
>>   Not to talk about pacemakers or the unknown long-term effects that can
>> have on human health.
> 
> 1. You're standing in a 40 microtesla magnetic field right now.
> 
> 2. You're surrounded by devices that produce far stronger magnetic fields.
> 
> 3. Medical imaging scanners often generate fields of up to 3 T, yet show 
> no known negative effects on human health.
> 
> 4. According to known physics, most physical materials are very weakly 
> affected my magnets.
> 
> If you want to worry about something, worry about all those migrating 
> animals which reputedly use the Earth's magnetic field to navigate with...
> 
Frogs are generally not migrating animals, but they may influenced by 
magnetic fields like in: http://www.hfml.ru.nl/pics/Movies/frog.mpg

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