On 8 Feb 2005 19:25:25 -0800, someone wrote:

Wind going across a vent pipe seems like the cause. The sound comes and
goes and the pitch does not vary.

OK next step - does the noise come & go in relation to the wind? On
what kind of timetable & duration does it come an go - random ,time of
day, weather; for seconds, minutes, hours etc.? Does it seem to have
any relation to how hard the wind is blowing or what direction? When
the wind is gusty does the noise 'gust' also? When the wind blows
harder does it get louder? I was under the perhaps unwarranted
impression that the noise level was fairly constant - skeptical that a
wind noise would be like that.

Is the roof accessible? When it is blowing can you go up outside &
"hear for it" to try and discern where it is coming from? If it can
be 'depended' on to be for several minutes or avery day, just
TEMPORARILY put a coffee can over the pipe (its not gonna explode your
house to impede the venting for a few minuted) and see if it makes a
difference.

If its a wind whistle, just, say, taping a stick to the side of the
pipe (sticking above the end) could change the harmonic
characteristics without impeding the venting.


Reply to NG only - this e.mail address goes to a kill file.