True D-box system is limited to 100Hz but not at 5Hz! It goes from 0Hz to 100Hz. Ok you're thinking well that's a difference of 5 Hz! Well it's more that just 5Hz; all the MOTION is in that range.
I agree with you. I understand entirely the superiority of motion capabilities and I do understand 0-500 meaning you are capable of holding a position indefinitley. However, I am going to keep repeating that where you and I do not see eye to eye is on the tactile portion. I am in agreement with Crowson when it comes to fully utilizing the human tactile sensation. You should not limit the effects to 100 Hz.... tactile experiences in real like are upwards of 500 Hz... of course blind people can sense higher but that is not the point. The point is that while I accnowledge your overall superiority and the ability to do 3D motion, I disagree with you on the tactile capabilities.
I do realize that the furniture itself does attenuate the higher frequencies, but that is another issue and nothing to the fact of the goal of virtual reality which is in essense of what we seek and of course takes the basic and full understanding of neurophysiology. Again, the only weankess I see in your product is lack of ability to vibrate above 100 Hz. You say you can do 200 Hz, but my guess is that you would have to lower the excursion or make some sort of tradeoff to attain higher frequency response from the actuators. I believe that is the closer reason to the truth. there is no NEGATIVE to being able to provide up to 500 Hz tactile information, this is desireable for the analgoy given previously.
This is the major difference between D-box and ANY other system that vibrates. D-Box MOVES up to 1 1/2 inch!!!!. In all oter product I have tried, Frequencies below 5 Hz aren't there and the 5Hz to 8hz range often do really weird things. The D-Box system actually move according to the action on screen (I'll get back on this).
Again, I have zero concern about D-BOX motion capabilities, you are preaching to the choir when it comes to D-BOX ability to do 0-100 Hz and I do very much appreciate that fact.
Now for everything over 100Hz. We could actually go up to 200Hz, why don't we do it?
Because like anything in physics, you haven't found a way to have 1.5 inch excursion and be able to reproduce 200+Hz without a tradeoff most likely.... Because ideally you would be able to have 1.5 inch excursion and up to 500 Hz frequency response. I agree with Crowson in this manner. I have had a long discussion with them as well. You are both great companies, but I cannot condone human physiology and the goals we all seek.
You won't feel it!
This is a bit more complicated... It is partially do to attentuation by the fabric and foam in the furniture to some degree but this can be addressed. Phyiologically you would be incorrect, people can sense upwards of 500 Hz via tactile, but you are correct in the sense that this is not linear just like there is a hearing sensitivity curve, there is a tactile curve.... That still is not the point. The point is to know human physilogy and how best to create virtual reality, after all, that is the goal here is to recrate what the actor is experiencing...
And it's awful distracting. the more you go over 100Hz the less you can feel it.
Two different issues. Please separate them: 1) Should not be distracting. If it is, the information is not coded properly. 2) Yes, the material in the couch does attenuate the higher frequencies, but this is a separate issue.
And this is even worst with a good and comfortable couch. The thicker your padding are the less you are going to feel. So unless you sit on a fiber glass chair, you won't feel much.
The answer is obviously something in-between. This is just physics, and proper material have been addressed that can offer the best possible scenario... I know this has been addressed by manufacturers working with Crowson. It is just a matter of design, like anything... what are the design goals and tradeoffs... this is obviously a much larger discussion.
And the human ear can hear from 20Hz to 20kHz, if you don"t want your seat to over ride the sound of the movie you can"t go too high in the frequency range, other wise you won't feel the vibration but you will hear it. So it's way below1kHz that it becomes out of the vibration range.
Could not agree with you more... That is specifically what I have been writing all along. this is why people like Clark Synthesis give tactile a bad name because they don't know what they are talking about and clearly misinform people with their lack of understanding of basic neurophysiology.
Overall, I think D-BOX has the best overall system... That doesn't mean it is perfect or that there is no room for further improvement.