×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

sound from one toilet to another via duct

sound from one toilet to another via duct

sound from one toilet to another via duct

(OP)
Dear Gents,
           I am very glad to get your interest for my question.Now the owner of my marine project asking for the sound disipiation from one toilet to another from the exhaust duct.From my point of view,there is a suction pressure in the duct and the sound from one toilet to another is to be ignored.Hoping your kind suggestions.

RE: sound from one toilet to another via duct

I'm not sure that I understand your issue, so I'll restate my understanding and my answer.  I incorrect, please correct me.

You have two separate toilets (restrooms, bathrooms, etc.), each with an exhaust fan blowing through a common duct.  Sound may be heard between the separate rooms through the duct.  The owner does not like the condition.

If my understanding is correct, the owner has a point.  The exhaust fans should be separately ducted to the exterior.

RE: sound from one toilet to another via duct

Greg, are you suggesting that increased fan speed will suck the sound out better or merely that an increased fan speed will mask more of the *ahem* unwanted noises?

M

--
Dr Michael F Platten

RE: sound from one toilet to another via duct

You could either use separate fans and ducts to vent each toilet or install an acoustical silencer in each suction duct. Here is a link to a broad line of duct silencers:
http://www.industrialacoustics.com/usa/commercial/index.asp

There are many manufacturers and suppliers if you search the Net.

Walt

RE: sound from one toilet to another via duct

sound travels around 1100 fps/750 mph in air.
HVAC Duct velocity is designed for less than 1000 fpm/~ 11 mph.
I visualize a 200 HP 14 foot speed boat in a lazy section of the Mississippi river.

I think sound travels up or down stream easily at any foreseeable duct velocity.  

RE: sound from one toilet to another via duct

Greg is right.  Mask the unwanted sounds.  At 2am, blu-doosh can be heard through many apartment walls, floors, celings.

- Steve

RE: sound from one toilet to another via duct

An old thread but if you've not yet solved then use an absorbtive cross talk silencer.

We use them for this application all the time. Just cut it into the duct run at the wall penetration.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources