Hello gentlemen sorry if I write to you later but I still had problems with the cable internet line, the technicians told me that there are vandals who cut the wires, so with the Christmas holidays it was not possible to carry out the repair work . Now I am writing to you from my smartphone, because the cable line is still not active, and in addition I have the covid. So to resume the discussion I have already decided to adopt 3 systems to produce infrasound, the first is through the bass shaker, the second is through a transmission line and the third I would like through the thermoacoustics through the Helmotz resonance, from the works of the VW professor Slaton. So for each option which products should I buy ??
In the second case, by transmission line I mean a very long tube wrapped around itself to take up as little space as possible, as from the projects of the scientist Vladimir Gavreau, he used a tube 24 meters long and 1.8 meters wide but these dimensions are prohibitive. Anyway I hope you can continue to help me and sorry if I disappeared suddenly but it was not my fault, unfortunately now I also have covid and have been motionless in bed for more than 2 weeks
Farble,
Unless you raise your budget past $200, you have no chance of building 3 systems.
Of the three, bass shakers would give the most "bang for the buck".
Sorry to hear of your illness.
As an aside, I find exposure to sustained frequencies below 25Hz at even 80dB SPL to give a similar feeling of nausea as experienced with the flu or seasickness.
Art
What if you built a false ( semi flexible ) wall about a foot away from an existing wall and covered the false wall with shakers? - this would give you massive " cone " area.
Yes, but the shakers, like bass drivers, have a resonant frequency below which they produce little output. A custom solution is likely required.
It really isn't possible to give explicit suggestions without know a lot more detail about what you are trying to achieve and in what environment. You've said you want a mobile solution: is it for a band, a public audience, a funfair show ride, picture cinema, home theatre, etc? Is it going to be used indoors, outdoors, for 1 person, 10 people, 100 people? Do you need a wide bandwidth like a loudspeaker has, or do you need single frequencies like a pipe organ? How many frequencies?
Until the specific application and performance criteria are established, giving advice is no better than playing darts blindfolded when dizzy.
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What about solenoids ( just over £ 5 each on Amazon - 1/2 inch throw ) between a flexible wall and a solid wall?
of course I can obviously increase the budget, for the covid I will have it for a long time also because I suffer from other diseases and this complicates
wow excellent idea I had not thought about it, but I will keep this option for later since now I have to have a solution that is transportable at least in a travel suitcase, however your idea I will not abandon it maybe I will adopt it in my studio
ok john I think you are referring to the surrounding environment, so I have adopted these 3 choices just to adapt to all needs and therefore I will have to use the bass shakers outdoors, but a few meters from the person involved, in this case of the spectators of a film and for distance I speak even only of a meter so taking into consideration the bass shakers I should opt for a single one or on an array of shakers, as you proposed to me? I hope I have hit the answer
yes yes this answer I read it now, and as I had already said before the use is mixed both open and closed that's why I chose 3 options (bass shaker, transmission line or tube, thermoacoustic) people, since we are in a pandemic and here in Italy they are very rigid, not reaching 100 people but maximum 10 people at a time or even just one
Depending on how much you want to spend, maybe reach out to Bossobass. I used to follow him when I was over at avsforum years ago. There was nobody that I ever ran across knew about sound that far down than he did. His website is below; unfortunately, I do not know the prices of his gear.
Bosso's website
Bosso's website
ok and considering that the spectators are few, and also I would like the bass to be in one position and not scattered, is it okay to buy only one or more than one? in which position should I place them?