Floating Floor Calculator

Post and discuss acoustic topics, Studio design, construction, and soundproofing here

Floating Floor Calculator

Postby interface » Sat Jul 16, 2005 1:00 pm

This Excel file calculates the insertion loss of dynamic forces.
It can be used to calculate floating floors, suspended ceilings or any other constructions for vibration control and structure-born noise control.
Would appreciate any comments to improve.

Interface
Last edited by interface on Tue Jul 26, 2005 4:37 am, edited 1 time in total.
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany

Postby Eric.Desart » Sat Jul 16, 2005 1:17 pm

Interface:

I hadn't found time to check your different calculators yet, but the one I saw indeed has a nice interface.
We're very greatful for those contributions.

In order to find them easier back you could upload them in the Calculation Tools section were you just make a seperate topic with your name, or otherwise I'll do it for you (did this for others too).
http://forum.studiotips.com/viewforum.php?f=27

You still can announce new files in the forum linking to your topic in the calculation tools section.

If we leave them in the forum they get easy lost in the mass of the threads.

I gladly do it for you, however if you do it yourself, they remain accessible for you to for upgrades, new files etc.
Just tell how you like it.

If it should become to chaotic in the future I still can reorganize it.

I'll put Brian's there too. Or Brian can do it.
Image
divinely-inspired
Eric.Desart
Moderator
 
Posts: 2461
Joined: Tue Feb 10, 2004 4:29 am
Location: Antwerp, Belgium

Postby interface » Sat Jul 16, 2005 2:16 pm

Thank you Eric,

I would be much obliged if you could do it for me (...don't want to mess it up :wink: ).

interface
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany

Postby Howler » Sat Jul 16, 2005 3:28 pm

The simplest way I have found to get a floating room calculator is to take a regular room calculator and glue styrofoam to it.  It'll float just fine.

:mrgreen:    :mrgreen:
Stephen Foster
Stephen Foster & Howler
http://www.howler.biz
Howler
 
Posts: 717
Joined: Sun Feb 01, 2004 11:17 pm
Location: Huntsville, AL, USA

Postby interface » Sat Jul 16, 2005 5:22 pm

Here is a comparison of the transmission loss between a theoretically calculated and a measured spring-mass system.

Interface
[/img]
Last edited by interface on Tue Jul 26, 2005 4:37 am, edited 1 time in total.
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany

Postby Eric.Desart » Sat Jul 16, 2005 5:43 pm

Interface,

If this comes from a book please give full reference.
Image
divinely-inspired
Eric.Desart
Moderator
 
Posts: 2461
Joined: Tue Feb 10, 2004 4:29 am
Location: Antwerp, Belgium

Postby interface » Sat Jul 16, 2005 6:05 pm

Here is the reference:

The comparison of the transmission loss between a theoretically calculated and a measured spring-mass system is from an older company book of "Gerb Schwingungsisolierung Berlin".

interface
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany

Postby Eric.Desart » Sun Jul 17, 2005 10:54 am

Interface,

I entered it, and added a sticky related to Analysis Toolpak functions also.
http://forum.studiotips.com/viewforum.php?f=27

Brian I'll enter your other file too there.  Must first search message were you entered it.
Image
divinely-inspired
Eric.Desart
Moderator
 
Posts: 2461
Joined: Tue Feb 10, 2004 4:29 am
Location: Antwerp, Belgium

Postby interface » Sun Jul 17, 2005 3:36 pm

Thank you for the work Eric.
---
I did a little mistake with one symbol in the entry sheet.
I used η (eta) for the calculation of the damping in the calculation sheet but not in the entry sheet.
I changed the value for η (eta) to the damping degree D in the entry sheet which is η/2 (eta/2) and forgot to remove and change the symbol to D. Sorry for that!

I noticed a lot of you planned with Sylomer as an elastic layer to create a floating floor.

Here are the damping degrees for the most known Sylomer types.

Sylomer-G: D=11.50%
Sylomer-R: D=11.50%
Sylomer-L: D=10.00%
Sylomer-M: D=9.00%
Sylomer-P: D=8.00%
Sylomer-V: D=6,00%

Interface
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany

Postby Eric.Desart » Sun Jul 17, 2005 3:58 pm

Thanks Interface.

To make it easy, I just linked to the messages rather than uploading them there..
So if you have a new version of a file, just edit that same message of yours.
You can upload new versions of your file, or delete and re-upload them.
Image
divinely-inspired
Eric.Desart
Moderator
 
Posts: 2461
Joined: Tue Feb 10, 2004 4:29 am
Location: Antwerp, Belgium

Postby Dan_Fitzpatrick » Mon Jul 18, 2005 12:04 am

interface wrote:Here is a comparison of the transmission loss between a theoretically calculated and a measured spring-mass system.

that is an interesting sketch, i had thought the natural frequency and the spring resonance were the same thing. now i'm confused. :x

dan
Dan_Fitzpatrick
 
Posts: 80
Joined: Wed Apr 27, 2005 9:28 pm
Location: SF Bay Area, California

Postby interface » Mon Jul 18, 2005 8:39 pm

Thank you Eric for the updating work.

--------------------------------------------------

Hi Dan,

The spring resonance is the first internal natural frequency of the spring itself, not of the spring-mass-system. For a metal spring it can be calculated with the values of the diameter, the number of winding, the mean winding diameter, the shear modulus and the density.
The major drop in the transmission loss curve which you have noticed can be improved by damping the spring itself or by adding elastomer-, rubber- or elasto-plastic pads above or below the springs. There are also some other possibilities.

Will
interface
 
Posts: 62
Joined: Tue Feb 22, 2005 8:34 am
Location: Germany


Return to Discussion

Who is online

Users browsing this forum: Bing [Bot] and 2 guests