My attic noise was a low frequency short!

Questions on how we spend our money and our time - consumer goods and services, home and vehicle, leisure and recreational activities

What do you think caused my attic noise?

Poll ended at Wed May 18, 2011 9:47 am

A mechanical device of some sort failed
5
4%
A mechanical device of some sort failed
5
4%
Truss lift was the culprit
30
25%
The roof sheathing was to tight
41
34%
The roof sheathing was to tight
41
34%
 
Total votes: 122

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

My attic noise was a low frequency short!

Post by Cody » Mon May 16, 2011 9:47 am

(See post 47 below for the explanation)

I do not wish to lead all of my posters on but I have found the source of my
"Big Bang".
And it has been confirmed. You have all been invaluable and I'm hoping you can hang on just a bit longer.

For those of you who have not follow my terrible ordeal here is the link with the actual noise itself:
http://www.bogleheads.org/forum/viewtop ... sc&start=0

Before I reveal the source of my noise I would like you (perhaps for a book I may write later) to speculate on the source of the noise. Then I will tell you the source around Wednesday or Thursday.

The solution is one of the five choices.

Sleeping in Stillwater (MN).
Cody
Last edited by Cody on Wed May 18, 2011 7:42 am, edited 5 times in total.

User avatar
Sheepdog
Posts: 5005
Joined: Tue Feb 27, 2007 3:05 pm
Location: Indiana, retired 1998 at age 65

Post by Sheepdog » Mon May 16, 2011 9:59 am

I still want to vote for the ghost or poltergeist theory.
People should not say everything they think. They should think about everything they say.

User avatar
bottlecap
Posts: 5560
Joined: Tue Mar 06, 2007 11:21 pm
Location: Tennessee

Post by bottlecap » Mon May 16, 2011 10:02 am

Good news, Cody. I look forward to learning the source.

JT

porcupine
Posts: 1267
Joined: Thu Nov 04, 2010 11:05 am

Post by porcupine » Mon May 16, 2011 10:08 am

Cody:

Don't you have an option "we slew the ghost?" :wink:

Look forward to hearing the actual reason!

- Porcupine

porcupine
Posts: 1267
Joined: Thu Nov 04, 2010 11:05 am

Post by porcupine » Mon May 16, 2011 10:09 am

Sheepdog wrote:I still want to vote for the ghost or poltergeist theory.
Didn't see that you beat me to it!!

User avatar
englishgirl
Posts: 2471
Joined: Thu Mar 01, 2007 5:34 pm
Location: FL

Post by englishgirl » Mon May 16, 2011 11:18 am

So glad you found out the source!
Sarah

User avatar
madsinger
Posts: 899
Joined: Sat Sep 29, 2007 3:26 pm

Post by madsinger » Mon May 16, 2011 11:36 am

I hope you can really sleep in peace and quiet from now on! I'm looking forward to seeing the "answer"!

-Brad.

matt
Posts: 2305
Joined: Sun Mar 04, 2007 3:47 pm

Post by matt » Mon May 16, 2011 11:45 am

Given the massive amount of information released on this topic, this poll should be a good test of the efficient market. The collective Boglehead wisdom will certainly know the right answer by a wide majority, even if individuals aren't sure, right?

User avatar
HueyLD
Posts: 5730
Joined: Mon Jan 14, 2008 10:30 am

Post by HueyLD » Mon May 16, 2011 11:46 am

Cody,

The suspense is too much to bear. Can you reveal your answer on Tuesday?

tomd37
Posts: 2773
Joined: Thu Mar 01, 2007 10:39 pm
Location: Middle Tennessee

Post by tomd37 » Mon May 16, 2011 11:51 am

After following your lengthy saga after the initial post and reading each and every reply, I eagerly await your revelation :roll: .
Tom D.

User avatar
Christine_NM
Posts: 2627
Joined: Tue Feb 20, 2007 1:13 am
Location: New Mexico

Post by Christine_NM » Mon May 16, 2011 12:06 pm

Whew. I'm glad for you. That was the home repair from hell.

Edit: I am checking back each day to see if Cody has revealed the secret yet. I voted for roof sheathing too tight, but I was torn between that and low frequency sound.

PPS: @graveday - I wasn't sure Cody would find the problem before the rapture, much less tell us about it.
Last edited by Christine_NM on Tue May 17, 2011 2:07 pm, edited 2 times in total.
17% cash 47% stock 36% bond. Retired, w/d rate 2.85%

User avatar
norookie
Posts: 3016
Joined: Tue Jul 07, 2009 1:55 pm

Post by norookie » Mon May 16, 2011 12:51 pm

:D Mine was easy. A bent fan blade in the bathroom fan being turned by the wind. Your's IIRC was something to do with "insulating" the area? Maybe I did not follow the thread to well.
" Wealth usually leads to excess " Cicero 55 b.c

Easy Rhino
Posts: 3266
Joined: Sun Aug 05, 2007 11:13 am
Location: San Diego

Post by Easy Rhino » Mon May 16, 2011 3:56 pm

Congratulations on your house exorcism.

User avatar
Rosebud
Posts: 386
Joined: Sun Feb 21, 2010 11:31 pm

Post by Rosebud » Mon May 16, 2011 4:27 pm

I voted mechanical device failure, but my initial inclination was to vote for too tight roof sheathing. In any event, I am very happy to hear that you finally found the cause and eagerly await hearing what caused the problem.

MWCA
Posts: 2819
Joined: Fri Nov 30, 2007 4:21 pm
Location: A wonderful place

Post by MWCA » Mon May 16, 2011 4:33 pm

I suspect it was ninjas and pirates doing battle.
We are all worms. But I believe that I am a glow-worm.

User avatar
LadyGeek
Site Admin
Posts: 45570
Joined: Sat Dec 20, 2008 5:34 pm
Location: Philadelphia
Contact:

Post by LadyGeek » Mon May 16, 2011 4:44 pm

I voted for the roof sheathing. I've convinced myself that the sounds were traveling along the span of a roof (or over a long distance), which terminated at the end of a support. Hence the tap (wait), louder tap (wait), bang! Blame thermal expansion with nowhere to go.

BTW - I still think you should take a look at those cinder block cracks in the basement and consider drilling weep holes to relieve the water pressure.
Wiki To some, the glass is half full. To others, the glass is half empty. To an engineer, it's twice the size it needs to be.

rfburns
Posts: 438
Joined: Sun Oct 18, 2009 1:55 pm

Post by rfburns » Mon May 16, 2011 6:37 pm

It sounded very mechanical to me so I voted for that.

livesoft
Posts: 60972
Joined: Thu Mar 01, 2007 8:00 pm

Post by livesoft » Mon May 16, 2011 6:44 pm

Is not a loose baffle or loose vent a mechanical thingamajig?
Wiki This signature message sponsored by sscritic: Learn to fish.

ensign_lee
Posts: 252
Joined: Fri Mar 12, 2010 10:03 am

Post by ensign_lee » Mon May 16, 2011 6:47 pm

Man, I was really going with the ghost explanation.

Don Robins
Posts: 664
Joined: Fri May 06, 2011 1:44 pm

Post by Don Robins » Mon May 16, 2011 7:28 pm

It was the weight of sscritics files on social security which he stores in your attic.

jimbone
Posts: 137
Joined: Fri Apr 30, 2010 10:58 am

Post by jimbone » Mon May 16, 2011 7:34 pm

ensign_lee wrote:Man, I was really going with the ghost explanation.
Yeah, I liked that too... much more exotic than some simple structural detail :)

harrychan
Posts: 1394
Joined: Sun Nov 14, 2010 9:37 pm
Location: Pasadena

Post by harrychan » Mon May 16, 2011 7:56 pm

Can't wait! Better than the last 24 finale!
This is not legal or certified financial advice but you know that already.

MWCA
Posts: 2819
Joined: Fri Nov 30, 2007 4:21 pm
Location: A wonderful place

Post by MWCA » Mon May 16, 2011 8:15 pm

Pirates and ninjas.. Ninjas got the upper hand at the start with their stealth. However, true pirate luck kicked in and now they have the upper hand.

Stay tuned.
We are all worms. But I believe that I am a glow-worm.

User avatar
cjackson0
Posts: 641
Joined: Thu Aug 21, 2008 2:57 pm
Location: St. Louis, MO

Post by cjackson0 » Mon May 16, 2011 8:42 pm

Morgan wrote:I'm going with ceiling cat.


Image
:lol:
Sent from my iphone

boglebill
Posts: 154
Joined: Sun May 17, 2009 1:08 pm

Post by boglebill » Tue May 17, 2011 6:08 am

Maybe I'm the only one not amused! We've been following along and guessing for MONTHS!

REVEAL THE SOURCE!!!

User avatar
Info_Hound
Posts: 275
Joined: Wed Mar 23, 2011 9:47 am
Location: Fort Collins, Colorado

Post by Info_Hound » Tue May 17, 2011 6:32 am

+1 for ceiling cat. Wish this had been a choice.

I voted for sheathing. My thought was along the line that one sheet was popping and causing a ripple effect that increased tension as it worked its way down the length of the run. Hence the soft pop, wait, and louder bangs as the shifting met more resistance due to the lack of expansion space. I'm also guessing a metal plate(s) are somehow part of the problem since metal transfers cold very effectively.

Pacific
Posts: 1223
Joined: Tue Mar 06, 2007 8:19 pm
Location: Lost in the middle of the Pacific

Post by Pacific » Tue May 17, 2011 6:39 am

Don Robins wrote:It was the weight of sscritics files on social security which he stores in your attic.
:lol:

arthurb999
Posts: 440
Joined: Wed Apr 29, 2009 1:07 pm

Post by arthurb999 » Tue May 17, 2011 9:33 am

Water hammer

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

Post by Cody » Tue May 17, 2011 10:11 am

If you can't wait until tomorrow I will PM you.

Again I plan to write an article or book on this. That's why I appreciate your patience. That said I am more than willing to spill the "beans" to you.

Thanks,
Cody
Last edited by Cody on Tue May 17, 2011 1:43 pm, edited 1 time in total.

User avatar
NAVigator
Posts: 2457
Joined: Tue Feb 27, 2007 7:24 am
Location: Iowa

Post by NAVigator » Tue May 17, 2011 10:40 am

It's gotta be the ceiling cat, since I don't believe in ghosts. :)

Jerry
"I was born with nothing and I have most of it left."

User avatar
Kashi
Posts: 112
Joined: Wed Apr 28, 2010 4:58 pm

Post by Kashi » Tue May 17, 2011 10:43 am

NAVigator wrote:It's gotta be the ceiling cat, since I don't believe in ghosts. :)

Jerry
Gotta be ghosts. I don't believe in ceiling cats.

porcupine
Posts: 1267
Joined: Thu Nov 04, 2010 11:05 am

Post by porcupine » Tue May 17, 2011 11:06 am

Cody wrote:[...]That's why I appreciate your patients.[...]
Thanks,
Phil
Not all of us are doctors, hence have no patients :wink:
Kashi wrote:I don't believe in ceiling cats.
Who about sealing cats in the ceiling?

- Porcupine

User avatar
woof755
Posts: 3148
Joined: Sun Aug 05, 2007 2:03 pm
Location: Honolulu

Post by woof755 » Tue May 17, 2011 11:27 am

Willing to wait.

But I still recall that sound, despite not having listened to it for 3 months.

You should consider selling the track to Hollywood--it's seriously creepy (there is a reason reasonable people here are still blaming ghosts).
"By singing in harmony from the same page of the same investing hymnal, the Diehards drown out market noise." | | --Jason Zweig, quoted in The Bogleheads' Guide to Investing

User avatar
Sheepdog
Posts: 5005
Joined: Tue Feb 27, 2007 3:05 pm
Location: Indiana, retired 1998 at age 65

Post by Sheepdog » Tue May 17, 2011 11:39 am

woof755 wrote:(there is a reason reasonable people here are still blaming ghosts).
I resent that statement. I have never been reasonable.
People should not say everything they think. They should think about everything they say.

User avatar
woof755
Posts: 3148
Joined: Sun Aug 05, 2007 2:03 pm
Location: Honolulu

Post by woof755 » Tue May 17, 2011 11:56 am

Sheepdog wrote:
woof755 wrote:(there is a reason reasonable people here are still blaming ghosts).
I resent that statement. I have never been reasonable.
(I wasn't talking about you)
"By singing in harmony from the same page of the same investing hymnal, the Diehards drown out market noise." | | --Jason Zweig, quoted in The Bogleheads' Guide to Investing

marco100
Posts: 763
Joined: Thu Mar 01, 2007 7:09 pm

Post by marco100 » Tue May 17, 2011 12:36 pm

It was caused by a squirrel or raccoon.

User avatar
NAVigator
Posts: 2457
Joined: Tue Feb 27, 2007 7:24 am
Location: Iowa

Post by NAVigator » Tue May 17, 2011 1:16 pm

However, ghosts and a menagerie of mammals aren't even choices. Is this a trick poll?

Jerry
"I was born with nothing and I have most of it left."

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

Post by Cody » Tue May 17, 2011 1:37 pm

One of the five choices is the correct answer - no trick here.

Thanks,
Cody

User avatar
graveday
Posts: 509
Joined: Sun Oct 05, 2008 2:03 am
Location: Upstate Calif. near Sacramento

Post by graveday » Tue May 17, 2011 1:39 pm

Just make sure you tell us before the rapture.

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

Post by Cody » Tue May 17, 2011 1:44 pm

porcupine wrote:
Cody wrote:[...]That's why I appreciate your patients.[...]
Thanks,
Phil
Not all of us are doctors, hence have no patients :wink:

- Porcupine
Damn (dam?) spell check :oops:

Cody

jebmke
Posts: 7897
Joined: Thu Apr 05, 2007 2:44 pm

Post by jebmke » Tue May 17, 2011 1:56 pm

graveday wrote:Just make sure you tell us before the rapture.
Right. I think we lose a bit more than an hour of sleep this Saturday.
When you discover that you are riding a dead horse, the best strategy is to dismount.

User avatar
LadyGeek
Site Admin
Posts: 45570
Joined: Sat Dec 20, 2008 5:34 pm
Location: Philadelphia
Contact:

Post by LadyGeek » Tue May 17, 2011 4:13 pm

I think you should say what it is not, one each day. Thursday: it's not xx, Friday: it's not yy either. By Sunday, we'll know the answer. How's that for suspense? :)
Wiki To some, the glass is half full. To others, the glass is half empty. To an engineer, it's twice the size it needs to be.

User avatar
woof755
Posts: 3148
Joined: Sun Aug 05, 2007 2:03 pm
Location: Honolulu

Post by woof755 » Tue May 17, 2011 4:17 pm

jebmke wrote:
graveday wrote:Just make sure you tell us before the rapture.
Right. I think we lose a bit more than an hour of sleep this Saturday.
Lest Blondie be "left behind", a nod to the best rapture ever: http://www.youtube.com/watch?v=pHCdS7O248g
"By singing in harmony from the same page of the same investing hymnal, the Diehards drown out market noise." | | --Jason Zweig, quoted in The Bogleheads' Guide to Investing

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

Post by Cody » Tue May 17, 2011 7:34 pm

Tomorrow is your lucky day! Too much pressure to go on without telling.

I'd love to upload a photo (digital). Anyone know how to upload it to the forum? cjackson0? Help? My wife and I loved your pic.

Cody

Sidney
Posts: 6678
Joined: Thu Mar 08, 2007 6:06 pm

Post by Sidney » Tue May 17, 2011 8:10 pm

Cody wrote:Tomorrow is your lucky day! Too much pressure to go on without telling.

I'd love to upload a photo (digital). Anyone know how to upload it to the forum? cjackson0? Help? My wife and I loved your pic.

Cody
Then it can be a sound unless you know how to photograph sounds.

One down.
I always wanted to be a procrastinator.

User avatar
cjackson0
Posts: 641
Joined: Thu Aug 21, 2008 2:57 pm
Location: St. Louis, MO

Post by cjackson0 » Tue May 17, 2011 8:11 pm

Cody wrote:Tomorrow is your lucky day! Too much pressure to go on without telling.

I'd love to upload a photo (digital). Anyone know how to upload it to the forum? cjackson0? Help? My wife and I loved your pic.

Cody
I didn't post the picture of 'Ceiling Cat' but I'm pretty sure you can't upload a picture, only link to one. If you have a flickr account you can upload the picture there and then put the url for it between the Image
Sent from my iphone

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

The answer to my nightmare

Post by Cody » Wed May 18, 2011 7:36 am

And the winner (loser?) is a low frequency sound.

The unbelievable noise maker was a faulty component to my stereo - YES - a subwoofer gone bad.  Probably a faulty electrical impulse from a 20 year old subwoofer. That explains why it was so loud. That is what it’s suppose to be. In retrospect the noise sounds like an electromagnet doing something funky.

The loud banging was not even in the attic!!!!!  It was coming from below the den window, against the wall and bouncing sound off my ceiling.  We were three feet away from it many times when it banged and yet we could not tell it was the subwoofer (which was plugged in all the time).

I am currently researching low frequency sound (a sonic effect) and have learned that bass tones can play tricks on the ear. DAH!   That’s why people hide them behind furniture and guests in the room can not tell where its located. I discovered the solution when I had finished painting the room and putting it all back together. I plugged the subwoofer back in - "BANG".  I just about fainted.  I, later, recreated the sound in the basement (I was hiding the subwoofer there after I discovered it was the culprit.)

Thank you all for the support and help.  You may all be part of my book or article. I'm a bit embarrassed to tell you what I found but our nightmare is over. Man did I learn some lessons. One lesson I learned is that people on the forum love to help - you helped me stay sane through this ordeal.

One of the architects said it best when he heard the news:
“You had all of us really doing maximum nerd-out on your issue.  The range of considerations was considerable.  To learn that the issue was a "sonic effect" should be documented in the technical literature of our era.  I hope your technical back-up data is bomb proof because NONE of the brainiac building science talking heads I have ever heard would have scoped this out.” JLarson

Thanks and sleep well (I will),
Cody

User avatar
Cosmo
Posts: 1192
Joined: Mon Mar 05, 2007 9:46 pm

Re: The answer to my nightmare

Post by Cosmo » Wed May 18, 2011 7:43 am

Cody wrote:And the winner (loser?) is a low frequency sound.

The unbelievable noise maker was a faulty component to my stereo - YES - a subwoofer gone bad.  Probably a faulty electrical impulse from a 20 year old subwoofer. That explains why it was so loud. That is what it’s suppose to be. In retrospect the noise sounds like an electromagnet doing something funky.

The loud banging was not even in the attic!!!!!  It was coming from below the den window, against the wall and bouncing sound off my ceiling.  We were three feet away from it many times when it banged and yet we could not tell it was the subwoofer (which was plugged in all the time).

I am currently researching low frequency sound (a sonic effect) and have learned that bass tones can play tricks on the ear. DAH!   That’s why people hide them behind furniture and guests in the room can not tell where its located. I discovered the solution when I had finished painting the room and putting it all back together. I plugged the subwoofer back in - "BANG".  I just about fainted.  I, later, recreated the sound in the basement (I was hiding the subwoofer there after I discovered it was the culprit.)

Thank you all for the support and help.  You may all be part of my book or article. I'm a bit embarrassed to tell you what I found but our nightmare is over. Man did I learn some lessons. One lesson I learned is that people on the forum love to help - you helped me stay sane through this ordeal.

One of the architects said it best when he heard the news:
“You had all of us really doing maximum nerd-out on your issue.  The range of considerations was considerable.  To learn that the issue was a "sonic effect" should be documented in the technical literature of our era.  I hope your technical back-up data is bomb proof because NONE of the brainiac building science talking heads I have ever heard would have scoped this out.” JLarson

Thanks and sleep well (I will),
Cody
Holy crap! I actually guessed the correct reason but I never would have guessed a subwolfer. Let me be the first to congratulate you on finally figuring this vexing puzzle out. I know it stressed you out and kept you awake. So I guess so much for trying to correlate this with the colder weather up in Minn? So why does this happen less frequently (or not at all) in the summer?

Regards,

Cosmo

Cody
Posts: 837
Joined: Sun Dec 02, 2007 9:19 am
Location: Stillwater, Mn

Post by Cody » Wed May 18, 2011 7:50 am

Thanks much Cosmo.

I guess the weather was either totally unrelated or the fact that the subwoofer sat next to an outside wall (thus colder in winter) "may" have promoted the electrical problem. I thought weather was our best lead - wrong!

The not so funny thing is that it did not sound at all like a short, you know like "scratchy" wiring on a stereo when a connection is poor.

Best,
Cody

User avatar
NAVigator
Posts: 2457
Joined: Tue Feb 27, 2007 7:24 am
Location: Iowa

Post by NAVigator » Wed May 18, 2011 8:04 am

Cody, that is just amazing. A "sonic boom"! :) I saw that possible solution in the poll, and thought you were just trying to deceive us. That wasn't even one of the usual suspects.

I think this demonstrates that people see a "pattern" in the data and tend to hold onto that belief. Even the "ceiling cat" gathered a following.

You said that the forum helped you keep your sanity. I have a theory that it is done by dilution. Sharing the "noise in your attic" problem has just made the rest of us a little less sane. :)

Best wishes,
Jerry
"I was born with nothing and I have most of it left."

Post Reply