Re: Thunder

HI all,
          Firstly, happy new year. Thanks for putting up with me again
Chip and all.
    Two cents worth (IMO) on this subject...

>  Why are Tesla coils so noisy?  (Especially running in my basement.)  Is it~
> the same phenomena as lightning & thunder?~
Firstly, the noise is going to be proportional to discharge energy. 
Most of the Tesla coil noise is coming from the secondary discharge
since that's where most of the energy is dissipated. Single-shot
experiments to a grounded discharge rod clearly show this to be the 
case. It IS an explosion. The gases (air) are being heated to 
temperatures of thousands of degrees. The expansion of the heated gas 
causes a compression wavefront moving outwards (initially) faster than 
the speed of sound. In effect, it is a mini sonic boom.