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Author Topic: Soundproofing against ferry noise?  (Read 505 times)

Soundproofing against ferry noise?
« on: May 21, 2017, 08:08:26 PM »

Hello all! I sadly got an apartment about two blocks down from a ferry terminal and the ferry engines and horns have become quite disruptive to my sleep. I installed an interior window inside the regular window of my bedroom and this reduces the noise from about 50db to about 45db but the remaining noise is still pretty disruptive to my sleep. Because I now have two windows in the window cavity, I am less confident about where the remaining noise is coming through (window or wall) - so I am considered installing an sliding glass door across the entire wall that contains the window.

I've read around this forum and have spoken to a few different window installation companies but sadly I can't seem to get a very good answer on whether this plan is likely to actually attenuate the noise. Some say that any additional door/window will have very little marginal soundproofing value because the noise is just likely to go through the side walls/ceilings/floors, or that more glass over the existing installation is adding so little mass relative to the existing installation as to be useless, but others think that the flanking is unlikely to be a problem and I should in fact get significant value out of the sliding door. I was hoping that the experts here might be able to give me some help! So am I fighting an unwinnable battle with these ferries or is it plausible that just adding more mass and airspace will actually help with my problem?

Thanks!

Randy S

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Re: Soundproofing against ferry noise?
« Reply #1 on: May 23, 2017, 03:20:44 PM »

How much of an air gap did you achieve on your first attempt?

What is the wall construction? the entire assembly.
You might have to soundproof the walls before attempting to improve the window system.

Please advise

Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040
Re: Soundproofing against ferry noise?
« Reply #2 on: June 10, 2017, 07:23:51 PM »

The response I got from the building manager was:

Exterior walls consist of masonry or limestone cavity walls, consisting of nominal 4 inch face brick or nominal 2-1/2” limestone cavity, space, nominal 6 inch concrete block, metal studs with R-11 insulation and 5/8” thick gypsum board finish.


What do you think Randy?
Thanks!

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 778
    • Super Soundproofing Co
Re: Soundproofing against ferry noise?
« Reply #3 on: June 12, 2017, 03:51:16 PM »

The build has a lot of mass so that is good, I am afraid you are heading down the diminishing point of return.
In order for you to see another 5 db drop you would have to either double the mass or create complex structure by re hanging the sheet rock on clips and channel.

Maybe an absorption with inside might improve your situation.

Give me a call direct and lets see if we can't get you a couple more points with out breaking the bank.

Randy S.
760-752-3030
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040