On 24 Jan 2007 07:49:47 -0800, wrote:

|Having recently moved into a new build apartment, the noise through the
|trickle vents in the bedroom window is driving me mad. Ironically, the
|spare bedroom (which faces a railway line) has acoustic vents through
|the wall rather than trickle vents through the window frames and it is
|*much* quieter than the master bed where the trickle vents (even when
|closed) let in way too much noise from the nearby road and passers by.
|
|I have been trying to find some sort of acoustic trickle vent to
|replace them with but thus far have only found the DN range from
|Greenwood
|(http://www.greenwood.co.uk/data/DN%2...ta%20sheet.pdf) which
|unfortunately doesn't come in the size I need.
|
|Can anyone suggest any others?

Just to mention that ventilation without transmitting noise *can* be done.
I was once involved with a 1 ft sq ventilation duct built like a car or gun
silencer http://www.kwik-fit.com/how-exhausts-work.asp. It reduced the
noise level from well over 100db inside to maybe 50db outside, a public
space. Hate to think how much that cost.

Maybe a large bore gun silencer would work, or I found this
http://lanephillips.net/projects/silencer/
which would probably work, if made out of durable materials.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
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