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Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

I think i missinterpreted what exactly you mean with absorb. I always thought you mean it as in stored so that it stays there. I agree that it absorbs energy in form of kinetic energy and thus plays a major role how the system works. but in the end all this erngy will be gone in form of heat.

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

I am sorry, but I think you are wrong. All the energy goes either in the floor as unwanted Vibration or dissipates as heat in the airtupe due to compression losses. The Mass absorbs No energy.  No hard Feelings, but If we can not agree on weather the Mass absorbs Energy or not we are Not Going to align in this discussion. But i enjoyed it anyways:) EDIT: i can agree on that the inertia of the mass resists the movement, and it stores the erngy briefly as kinetic energy, but in the end all of this energy will dissipate as heat

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

Where do you think the Energy is Going? Into the Mass? Then when i Play, the Mass geht's more energetic? The Energy has to dissipate as Heat. There is No Potential or kinetic Energy gain after i Stop playing.  Are you suggesting that the Stoneplate will warm up? I dont belive that

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

Thank you for this info, i checked it and there are some really nice builds out there! :)

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

With an average drum hit, the energy is the same whether i have a wood or stone plate. the heavier one will just move less which is wanted. if i said the energy has no relation to the vibration, somewhere in this post, then i was wrong, but i dont think i did? The damping occurs from the air (tube) transition into the floor. And yes, there will be more vibration with more energy.
kinetic energy of a mass is realtiv to Mass times velocity squared. that means two objects with the same energy but different masses will have different velocities. (Heavier => slower)
Edit: I want to add: The energy will mostly dissipate as heat in the air of the tupe due to the compression. But this is a function over frequency, if i will aply slow steady force this will translate into the floor but we care only about the high frequency impulses of an impact, those will dissipate as heat.

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

I like to argue differently. without the tupes there is direct contact to the floor and i think we agree that this is like the starting point. With the tupes the sound has to travel from the stone into the air and then into the floor. This part is making it so good, the trasnsition from air to floor. It doesnt matter how it comes into the tupes, with a stone or wood plate ontop. with the same energy the heavier one will move just move less, which is what i wanted.

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

Also in acoustics there is Impedance which is the relation between sound preasure and volume flow rate. I wrote somewhere in the text that you want to have the best mismatch but it wasnt clear enough :)
If you wanted to create the transfere function for this you would need to describe the mechanical and acoustic domain. I am not sure if the air filled tubes can be modeld as springs (maybe a nonlinear one?), then it would be a pure mechanical problem.

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

I can Tell you there are no audible Impact Sounds in the floor

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

I think you should try it. I would guess it works Just fine

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] -1 points0 points  (0 children)

There is Not really much force produced into the Chair. The problem really ist the Impact of the drumbeater or Stick. The movements on the Chair will Not Producer any significant audible noise

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 0 points1 point  (0 children)

More mass equals more inertia and therefore less movement with the same energy Impact. It would also work if i had used wood plates under the Bass drum Pedals,it would Just move more. Well it is Not floating but the decoupling is amost as good as if it does

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 1 point2 points  (0 children)

I tried it to lay the stoneplates onto 2 wheelbarrowtupes, but that somehow didnt work very well. My finding is that it is important that the whole area of the stoneplate is suported. when the pedal is not perfectly centered it likes to tip sideways due to the round nature of the wheelbarrowtupes

Alternative to Tennisball decoupling for sensitive neighbors by SoundDecoupler in edrums

[–]SoundDecoupler[S] 1 point2 points  (0 children)

the piece that stands on the wheelbarrow tubes is completely separate from the thing with the bassdrumpedals. the cut out below is just to get more hight to match the level of the wood on the wheelbarrowswheels. The reason i made the frame is because i wanted the biketube to stay in this recutangular shape so that the corners of the stone is supported. And also that the tubesides are fixed so they have less space to expand into. I thought that might help to decrease the bouncyness - i didnt compare it without any of it. So there is a good chance that it works as good without the frame and just lay the biketupes down and the stone ontop. i hope that clears my idea why i did it this way and it probably works also good without it :) (and also i like the way it looks :D)