Please help me determine what this incredibly annoying noise is!

100hz

An intermittent, 100hz hum which im hearing in my house is doing my nut in. Its happening pretty much all the time, all night and started about 2 weeks ago.

it continues to happen when i turn off power to the property. It continues to happen when i turn the stop !!!! off to the property. I have a combi boiler but im sure its not that as it still happens when i cut the power and doesn't sound like its coming from there anyway.

I live in an end terrace property and have one neighbour attached to mine, it doesn't seem to be coming from their side though. I can hear it all over the house, but It seems to be more present on the other side to the attached property, where beyond the wall is just someones garden. Its also more prominent the rear of the property, which is completely detached. Ive had a look in the neighbours garden and cant see anything which would cause the noise. Its omnidirectional so its hard to tell exactly where its coming from, but its bang on 100hz .

Because its 100hz could it be the second harmonic of mains hum? I thought mains hum, would be constant though tbh

I have audio and spectrum analyser readout video but cant post the links to them as im a new member (lame)

DCFC79

You can post the links but just omit the http, someone will add the http and do a link.

jk0

On my morning walks I have noticed this in two spots in the pavement. I believe water has got into an electrical junction, and is arcing.

100hz

youtu.be/_E8eTwwkBOY

clyp.it/vquilkc2

100hz

It doesn't sound crackily and random enough to be arcing.

moneyistooshorttomention

Have you googled for "The Hum"?

It is a recognised phenomena - whereby a humming noise can be heard in a specific location, but it's only a very few people that can hear it.

The Hum does exist - I've heard it myself for a few days at a stretch in my last house and only one other person could hear it.

I "tested" for whether the noise was "The Hum" or something wrong with my own body (eg tinnitus) by broadening and broadening the radius I could hear it.

I heard it throughout my house and could hear it within a noticeable distance radius of my house. I had to get to a distance a couple of miles away from my house before I stopped hearing it.

That at least proved I could be thankful the noise was nothing to do with me personally. Having been told about tinnitus - I was scared in case I had that, as that would have been my worst case scenario.

At least a location-specific noise can be got away from - if one has to sell the house concerned and move to do so.

Google for "The Hum" and you will find info. on it - including support group for sufferers from it.

Thankfully it resolved itself after a few days when it happened to my last house - though it may have been down to the fact that I reported it in all possible directions (eg I was wondering if it was the electric sub-station down the road) and I know they came to look at it. So that might have been the "culprit" and they resolved it. One way or another The Hum stopped thankfully.

jk0

Ah, you've given me an idea by mentioning the stopcock. In some of my flats, you can hear upstairs' boiler pump. I think the sound travels through the pipes.

100hz

Its a combi boiler and the pump is inside it, the noise continues when I cut power so i can't see it being the boiler

-taff

Next door has a shower pump that comes on and off and sounds bit like that, only louder...

jk0

100hz wrote: »

Its a combi boiler and the pump is inside it, the noise continues when I cut power so i can't see it being the boiler

You cut off the power to next door?

Lidon1

I kept hearing a high pitched electrical type buzz coming from my internal garage. Turned off power could still hear. In the end was convinced it was the alarm sensor... blocked this up could still hear.
Couldn't really put to one spot or area.
Finally figured out it was the batteries going in the exercise bike that had caused the screen to make this noise, took out batteries it stopped!