NO one hears a sub signal NO ONE.. You feel it..
If anyone was to sit in a SUB only room, and then crank the sound, your bones would fall apart.. Just that simple..
On a hydroelectric dam face the turbine rooms, limit the exposure to ALL people. Same issue in engine rooms on transport ships..
You have to be VERY careful with exposure to low LOUD harmonics.
I read earlier in the thread 15 hz.. LOL. A 32 foot pipe will hit 16 hz in a TUNED chapel/Cathedral ONLY. Helmholtz tech is used to control and obtain it.. It doesn't just happen in nature..
A VERY well thought out room is the only way to get even close to 20 hz. NASA's Langley Research Center has purchased two Larger VMPS Subwoofers as a source of 118+ dB, 20 Hz tone bursts. The Larger Subwoofer was the only commercially available system capable at that time.
Nearfield testing can go lower, add a room in the mix, it literally has to be built to work..
FEW people could even put up with VIBS like 15-25hz.. Unless you're already NUTS..
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I read earlier, "Whoever said that there's just not that much musical info below 40 Hz was absolutely wack."
"Also recall that "20 Hz" does Not represent the "lowest sound we can hear"
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I'm going to leave the statements above, but I would recommend a little education.. HEARING and SUB in the same sentence. Surely you jest!!
If anyone was to sit in a SUB only room, and then crank the sound, your bones would fall apart.. Just that simple..
On a hydroelectric dam face the turbine rooms, limit the exposure to ALL people. Same issue in engine rooms on transport ships..
You have to be VERY careful with exposure to low LOUD harmonics.
I read earlier in the thread 15 hz.. LOL. A 32 foot pipe will hit 16 hz in a TUNED chapel/Cathedral ONLY. Helmholtz tech is used to control and obtain it.. It doesn't just happen in nature..
A VERY well thought out room is the only way to get even close to 20 hz. NASA's Langley Research Center has purchased two Larger VMPS Subwoofers as a source of 118+ dB, 20 Hz tone bursts. The Larger Subwoofer was the only commercially available system capable at that time.
Nearfield testing can go lower, add a room in the mix, it literally has to be built to work..
FEW people could even put up with VIBS like 15-25hz.. Unless you're already NUTS..
<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>
I read earlier, "Whoever said that there's just not that much musical info below 40 Hz was absolutely wack."
"Also recall that "20 Hz" does Not represent the "lowest sound we can hear"
<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>
I'm going to leave the statements above, but I would recommend a little education.. HEARING and SUB in the same sentence. Surely you jest!!