Yamaha DTXpress/DTXplorer/DTXtreme

Yeah, by vibrations I meant those (very low?) frequencies that the 
vibrating rack and bass pedal send through a concrete floor. By 
ordinary "sound waves" I meant the sound (somewhat higher 
frequencies) YOU hear in your apartment when you hit the pads. The 
terminology was wrong, I admit, but I was just trying to illustrate 
my point. 

My logic (which once again may be at fault) says the softer the 
platform material, the better it eliminates the kind of structure-
borne vibrations we are talking about here. The harder the material, 
the better the vibrations are transmitted further onto the floor. Now 
I'm no expert in soundproof mats - which of course work in their own 
specific ways - but at least I know they are quite a bit more 
expensive than foam. 

-Antti




--- In DTXpress@yahoogroups.com, "moosetication" <moosetication@y...> 
wrote:
> --- anttipi wrote:
> > A soundproof mat may be good for stopping sound waves but 
> > I don't know if it's the best solution for vibrations...
> 
> Hmm. It is, of course, many centuries since I did physics, but I 
> suspect that sound is still transmitted in the same manner it was 
> back then. Namely, by vibrations. The difference is one of 
frequency.
> 
> Stewart