Archontis,
Was you group using a dual laser set up or where you
depending on dust/debris in the air to trigger the noise?
Gary
On Mon, Mar 26, 2018, 18:39 David Pickett <d...@fugato.com> wrote:
> At 09:25 26-03-18, Politis Archontis wrote:
>
> >I also remember during a lecture in ISVR, UK, the lecturer mentioning
> >these old plasma tweeters, saying they did not get very far cause they
> >were ionizing the air producing hazardous levels of ozone :-D .
>
> Rubbish! A friend of mine had a pair and they worked well and nobody
> I know suffered from ozone exposure.
>
> The problems were a) they were patented, b) they were very expensive
> and c) they wouldnt work below 10kHz unless loaded by an enormous horn!
>
> David
>
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