An Interloper?

[bjm362]

I wish I had gotten in on this thread while it was fresh! I believe it can be achieved with 17.6 ft 1/4 wave length horn but not with traditional horn loading. You are going to need a dual axis isobaric chamber ( Quadrabaric system) and 4 21's to maintain xmax. Each driver must load energy from its back chamber phase corrected(good luck with the bill paying the plumber to build those ports) through its ports back into the primary chamber....That is the chambers in the attic, loading the horn in going through the garage. Not practical, but not impossible! I am not going to run a spread sheet on how big that mouth has to be though!

Edit: If you really must experience 16hz, go to New York. I forget the name but there is a Cathedral there that the entire sanctuary and basement complex is a pipe organ. It does have a low A. I don't know how loud it gets. But I would get that close to the A pipe! Not that they are going to let you get that close anyway! 110 db @ 16hz will at least make you lose your bowels and could probably cause organ damage...brain damage etc...!

[Bill Fitzmaurice]

Edit: If you really must experience 16hz, go to New York. I forget the name but there is a Cathedral there that the entire sanctuary and basement complex is a pipe organ. It does have a low A. I don't know how loud it gets. But I would get that close to the A pipe! Not that they are going to let you get that close anyway! 110 db @ 16hz will at least make you lose your bowels and could probably cause organ damage...brain damage etc...!

You won't experience 16Hz. You'll experience the 2nd and 3rd harmonics of 16Hz, ie., 32 and 48hz. 16Hz is there, but at levels far too low to actually 'experience'. If you look at an equal loudness chart 16Hz at 110dB is no louder than 48Hz at 80dB.

[bjm362]

It may be semantics, because essentially I thoroughly agree with you. You cannot hear 16hz. However the term experience doesn't just imply hearing and that can be felt, the nerves around your bones will sense those vibrations. You will experience it from the inside out. Elephants make rumbles around 10hz and they are not the only mammal that can do that, whales do to. Those sound waves really travel!
As to the what DB that would reproduce, you are the expert I am not!