transmitting audio through glass

I've been trying to tackle the speaker and microphone issue. It seems like there is a multitude of ways to work out the speakers, but the mic will be harder, because it should be more localized and i need to deal with all the street noise. Here are a few higher tech products that turn the window into a speaker. It appears that the glass needs to be single pane if it will transmit it and not merely reflect it. Solid Drive I believe retails in the $500 range and seems to be a higher end version of $40 soundbug. Another product is CLARK SYNTHESIS TACTILE SOUND (tst) which claims " CNN engineers mounted TST’s to the glass panels of the building to allow the audio from the studio to be heard through the glass and protective bullet proof barriers. Using Clark TSTs to transmit the audio energy to the eight 12 foot by 10 foot plate glass windows, made an excellent sounding, invisible speaker. This process can be applied to plate glass, boat hulls, wood decks etc." they start at $135