I just ran across this guy's YouTube channel while researching another topic (cardioid subwoofer setup). I had to share this great find. There is just loads of good, accessible information here. I'd categorize most of it as "intermediate-level", by which I mean it helps if you're already conversant in the subject but you don't want to have to use a calculator to understand the lessons. But don't be intimidated if you're completely new to acoustics. If you happen to pick a video that flies over your head, just skip to the next one and come back to it.
 
He also has a free e-book, but I haven't checked that out yet. I plan to. So what's his angle? Like our favorite fiberglass salesman Ethan Winer, Dennis Foley is an acoustician who believes the more people know about the subject the more likely they are to buy his products and consulting services. Like Ethan, he's plain-speaking and down-to-earth and doesn't sound like a bored college professor, and like Ethan he is more than happy to show you how to make your own DIY treatments.

yes, Dennis is excellent. he has some really nice videos on cost effective treatment which will be helpful for people looking to get the best acoustic performance out of their room on a tight budget.

bitflipper
Like Ethan, he's plain-speaking and down-to-earth and doesn't sound like a bored college professor, and like Ethan he is more than happy to show you how to make your own DIY treatments.

But, like Ethan, does he offer a free online video in which he hired a stripper to get nekkid? 
 
P.S. Bet this posts fires off a few unanticipated google sessions.

dmbaer

bitflipper
Like Ethan, he's plain-speaking and down-to-earth and doesn't sound like a bored college professor, and like Ethan he is more than happy to show you how to make your own DIY treatments.

But, like Ethan, does he offer a free online video in which he hired a stripper to get nekkid? 
 
P.S. Bet this posts fires off a few unanticipated google sessions.

 
I remember that video. I had to watch it a few times for the information to sink in.

Isn't it proper etiquette to include a link?
;-)

DeeringAmps
Isn't it proper etiquette to include a link?
;-)

http://exposed.ethanwiner.com/index.htm
 
It requires Adobe Flash player, which some here have recommended be removed from your system.

dmbaer

DeeringAmps
Isn't it proper etiquette to include a link?
;-)

http://exposed.ethanwiner.com/index.htm
 
It requires Adobe Flash player, which some here have recommended be removed from your system.

I get this warning when I click on that
 

Kamikaze

I get this warning when I click on that
 

WARNING!

This video contains full female nudity, and is intended for adults only.

By clicking ENTER below you certify that you are at least 18 year old.

ENTER

And without a doubt, every eighteen-year-old male on the planet does the honorable thing and moves on to another pursuit.
 
 
Edit: I did, of course, mean to say "under-eighteen-year-old male".  Duh!

Or not.

Thanks bitflipper, very helpful :-)