Soundman2020 - Studio Design Forum

Avare wrote:Source of the post One the informal standards that is hinted at in standards is a rising low end with a decreasing high end. One of the earliest references to this and its origins is in the attached Bruel and Kjaer document.

Thanks, Andre!
Ah yes, the famous "B&K" curve (Fig 5, page 4). Well over forty years old today, and still very valid. I'm one of those crazy guys that still uses this today, for final room tuning. Because it still works! Forget the awful "X-curve", and the uninteresting "ruler flat" curve, and stay with this. Because the way humans hear has not changed, and probably won't change. I have found that B&K curve tuning is an excellent compromise between the dullness of very flat response, and the over-amped "bass heavy" EQ that some people like. My philosophy is that control rooms should sound natural, neutral, and transparent, and with the B&K curve you get that. It just somehow sounds "right".

Of course, you can only do that with EQ if the room is properly treated already, to get all of the acoustic issues under control! It's no use trying to use the B&K curve (or any other type of EQ) in a room that has lousy acoustics. Despite what some manufacturers of "room correction" hardware and software want you to believe, it doesn't work. Digital tuning can only be applied to a fully treated room. You can't fix a bad room with EQ!

- Stuart -

I have not seen any uploads in a while. It is not with significant new information but it is a great collection of data.

Greetings Andre,

Thanks for posting this! Excellent compilation of important need-to-know material, in a readable format.

All the best,

Paul

Thanks, Andre! That's a very useful one. The introduction to acoustics at the beginning is really good, and easy to follow, I think. Simple clear, diagrams, and simple, clear explanations. Plenty of good wall, floor, and ceiling examples, too.

- Stuart -

I have no desire to hijack https://www.digistar.cl/Forum/viewtopic.php?f=12&t=794. Attached is an analysis of 3 concert halls including Boston Symphony. There is much more than just the Schroeder Frequency involved with great acoustics.

Thanks Andre.

Avare wrote:Source of the post I have no desire to hijack

Feel free to hijack all you want, Andre! Your input is always very welcome, and very much on-topic.... and somewhat briefer, more focused, more concise than my meandering waffles!

- Stuart -

Something that is asked a lot is what about compressing the material? Here is a paper on that.

Thanks Andre! Very interesting.


- Stuart -

Vinokur has some great stuff on triple-leafs. He is referenced in Long Architectural Acoustics.

Good stuff, Andre! The derivation of the triple-leaf equation is in there!

Thanks!!!!


- Stuart -