Are projector screens transparent to sound?

I've seen many screens, but after viewing a Stewart, nothing comes close, that's why its the industry standard. Of course its not cheap, but you get what you pay for.

Agree with CMK. Get a Stewart 1.3 gain with the wide Delux frame and Velux coating. The extra wide frame looks much more finished than square tube frames. Overspray hits the frame and is absorbed by the special Velux material. After your eyes adjust to the dark you can see the overspray. Velux helps this problem. It will be the last screen you buy unless you change size.

Thanks, Guys.
Any suggestions on where to get a good price on a stewart?

You might check Videogon or ebay. Do not buy a GrayHawk or a FireHawk. These were made for early LCD or DLP projectors with bad black levels. You want plain white 1.0 or 1.3 gain. the latter will give a slightly brighter picture without hot spotting.

AVScience has competive pricing on Stewart screens.

While Stewart doesn't make an inexpensive screen, the price difference may not be too interesting once you've specified the useful options : wide frame, light absorbing coating, and the 1.3 gain fabric.

I paid just a couple hundred dollars more for my 87x49" Velux Deluxe Stewart with Studiotek 130 than I would have a DaLite with the same options.

Also note that the big manufacturers including Stewart will build a screen to any size and shape you want. If you'd prefer 2.4:1 or 1.85:1 they'll do that.