Author Topic: Strange, persistant humming noise  (Read 2165 times)

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Fay

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Re: Strange, persistant humming noise
« Reply #15 on: Jun 14, 2016, 18:32:36 »
so it must be you mark.
my hum was indoors. i heard it when I stayed at Micks, but his fan was left on downstairs, so that cancelled that event out
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The Thing

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Re: Strange, persistant humming noise
« Reply #16 on: Jun 15, 2016, 20:19:32 »
I can hear hums quite often at night here when I'm in the observatory. It's seafood processing at the coast 1.5Km away and occurs when the tides mean a load of fresh stuff has been landed at night. Yummy oysters, mussels, lobsters and the like... But I can't hear these noises from the house. Odd. (Or maybe I am).

But recently I have heard a different low hum in the house during late evening for an hour or so. It sounds like infra-bass and it varies over a short time. I suspect a neighbour has a new sub-woofer on his gaming PC.

BTW In Islay there are a lot of distilleries with water pumps and the like not to mention the bagpipes.
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Mike

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MarkS

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Re: Strange, persistant humming noise
« Reply #18 on: Jun 29, 2016, 23:58:25 »
Quote from: Mike
Cracking The Mystery Of The ‘Worldwide Hum’

Interesting article.  For those interested I've been able to synthesize fairly accurately what I'm hearing using a couple of online signal generators - a mixture of square waves, triangular waves and sine waves that sounds pretty close.
It's in Windows Media File format:  http://www.markshelley.co.uk/webdisk/MarksHum.wma

The base frequency is almost exactly 50 Hz and it deliberately contains a beat frequency (a kind of slow "Wah Wah Wah" effect) which I synthesized by mixing two signals with very close frequencies.

Enjoy!

Mark

Carole

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Re: Strange, persistant humming noise
« Reply #19 on: Jun 30, 2016, 11:11:15 »
Must be very tiresome.

Carole

MarkS

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Re: Strange, persistant humming noise
« Reply #20 on: Jun 30, 2016, 23:58:25 »
Quote from: Carole
Must be very tiresome.

I only really notice it in bed and when I'm in bed I don't stay awake long enough to notice!

Mark

MarkS

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Re: Strange, persistant humming noise
« Reply #21 on: Jul 26, 2016, 00:17:57 »
Strangely enough, the hum disappeared during my holiday in the Dordogne, France.  It was there at the beginning of the holiday and gone by the end.  Now I can't hear it at all.  How very weird.  Maybe excessive quantities of Bordeaux Red Wine are the cure!

Mark
« Last Edit: Jul 26, 2016, 06:27:00 by MarkS »

MarkH

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Re: Strange, persistant humming noise
« Reply #22 on: Jul 29, 2016, 20:44:38 »
Do you have any dental fillings Mark?

MarkS

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Re: Strange, persistant humming noise
« Reply #23 on: Jul 29, 2016, 23:03:48 »
Yes, I have fillings.  They were there before the holiday and still there after.

Mark

Mac

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Re: Strange, persistant humming noise
« Reply #24 on: Jul 30, 2016, 20:46:15 »
Do you know anyone who can let you have access to an anechoic chamber?

At least that way you can prove if its in or out side of your head.

Mac.
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