[Amps] Amps Digest, Vol 43, Issue 138

[Borislav Trifonov]

The stators are around each membrand and their DC bias is at zero volts, 
so they effectively shield the head from any potential (plus, the 
membranes are both at the same voltage, so there's no differential 
around the head).
Electrostatic headphones have been around since at least the 50s and 
they continue to be sold commercially, and I've yet to read about there 
ever being a health issue.


> Message: 2
> Date: Tue, 25 Jul 2006 14:04:36 -0400
> From: "Will Matney" <craxd1 at verizon.net>
> Subject: Re: [Amps] Amps Digest, Vol 43, Issue 134
> To: amps at contesting.com
> Message-ID: <200607251404360450.00E4A74F at outgoing.verizon.net>
> Content-Type: text/plain; charset=us-ascii
> 
> Bill,
> 
> Yes it looks that the 550 Vdc is a bias. The other current applied to the stators would be at audio frequency. As long as there's enough insulation between the ear and the diaphram, it shouldn't reach out and grab ya, Hi Hi! It is enough to make one think though when wearing them, LOL!! Maybe there should be a warning that says "Do not use after swimming"....