Great share, thank you. Though in searching for it I was surprised to find it was already mentioned on here... eight years ago! Crazy: https://news.ycombinator.com/item?id=1264713.

Still, thanks so much for posting it else I wouldn't have ever seen this. Cheers!

That is basically what the "loudness" button on older stereos did.

Bump about 100hz, another at 10khz or thereabouts.