Acoustic treatment


I want to build my own bass traps and was wondering if there are any other alternatives to fiberglass and rokwool. Foam is not a consideration as I don't believe it has the necessary qualities for absorption. I have heard of cotton batting, does anyone have experience with this material. The idea of fiberglass makes me itch just thinking about it, but I'm resigned to using it or rokwool if that's all I have.  Please make suggestions and let me know your experiences.

Thanks
Mike
zardozmike

Showing 12 responses by theaudiotweak

Not mentioned in the review or in the patent disclosure is how shear energy and material velocity only in solids is what  reforms compressive waves and actually makes for the differences we hear when various materials and shapes are introduced into an acoustic space. Tom
With a constant tone or even a strike point you can find the Resonant Point of any surface of any size or dimension. Tom
But its not that..It is the same way shear waves in the earth travel at different velocities and with different polaraties thru different types of rock ..more solid vs dispersed and porous determines the distance from the epi center the waves can be felt. Tom
Particle motion in various shapes, mass, density and material is what makes for the change in the solids that causes the air molecules to move and collide. That collision is what we hear..shear wave and particle wave motion in rubber or steel is the precurrsor to the audible. Their different particle motion and velocity potential stimulates the air and makes their resulting sound output indiviual and distinct. When you have different materials like the Resonators touching a different surface shape like drywall..then you will have shear waves traveling traveling in different direction and speeds changing the air motion and vibrational speed which again makes for a different sound result..Look some more Geoff.
Tom


Sounds as if you don't understand nor care to learn about the origins of sounds in materials and the resulting sound in air. Tom
The tiny bowls shape and material determines the shear wave pattern and velocity that makes the sound changes in the air. Copper, Silver, Gold and Platinum all have a diferent shear speeds and they all result in a different acoustic out come.
Put a stone or diamond if front of all that hang it on a wall and you have an acoustic resonator. All starts with material or materials and shape..keep looking. Tom
Add your can of hot air to outer space with the shear thats already there then you will have the potential of sound..just like you do here on Earth..Tom
Shear waves in solids are what change the air molecules that come in contact with various solid materials. The acoustic wave that is generated from this interaction returns to the solid surface creating more shear and then more acoustic energy is generated off the solid surface.  This process happens all over again..not a giga buddy UFO magnetic field. . Just many many touches between shear waves and acoustic waves. Never dissipated just converted into acoustic waves..and then shear until the wave diminishes into or between 2 or more surfaces.

The material tension changes the reactivity of the surface ..This tension also changes the shape of the surface and adjusts the resonance point of the surface changing where the shear is most reactive. A strike away from  the Resonant Point will give a drum a different sound than a strike right on top of the Resonant Point. Maximum energy transmission is when a wall surface resonant point is found and when a acoustic resonator is placed on that surface point. Tension will adjust the shear wave transmission between those 2 surfaces now touching at that point. The resulting shear wave transmission will follow a shape say a tiny bowl and the air molecules that are around that shape take on those patterns and are excited ..and so you have a shape and a material and together they generate a new sound. Change anyone of those.. add a new boundary such as a piece of tonewood and then add a jewel or 3 you will have another new sound..because they are all attached they will generate multiple shear wave patterns and then new multiple acoustic waves and patterns....Tom

PS.. Eighth Nerve was Room Tune when they split to Nashville..

Mike you should look into the purchase of long hair sheeps wool. I have purchased this material in large volume from a vendor in Michigan years ago. It is a wonderful material to work with and is safe to use in your home.


 



























Mijostyn,

You may want to  fill with some volume one of your glass objects with olive oil and then compare. Oils will conduct shear depending on their solid content. Distilled water less than salt water..Origin of olive oils will vary in shear velocity. Tom