tracking down noises

[tony sayer]

Excellent article that and that bloke Dr Baguley sure knows what he's on about:)..

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Dr David Baguley, head of audiology at Addenbrookes Hospital in Cambridge, estimates that in about a third of cases there is some environmental source for the hum.

But in most cases no external noise can be identified, he said.

Dr Baguley's own theory is that many sufferers' hearing has become over- sensitive.

He said people have an "internal volume control" that helps them amplify quiet sounds in times of threat, danger or intense concentration.

[Brian Gaff]

I'm 90 percent certain its the neighbours Central heating. I suddenly remembered the old tumbler against the wall trick, and the loudest noise is now located to the partywall between my airing cupboard and hers. (I'm glad I left enough room here for my head!), and its definitely kind of cyclic noise. I think it is actually going for longer than i said, its as if its only when its nearly ready to cut out that it makes the noise. Weird, as I'd have expected it to be off for longer, but who knows. Brian

[Adrian Brentnall]

HI Brian

Could it be a motorised 'zone' valve - that's diverting hot water from their boiler to radiators or hot-water cylinder.

I have one on our heat-pump in the workshop - and it takes a while (possibly 60 seconds ? - I've never timed it) to switch from one position to the other - and it's very much a 'clockwork whirr' while it's operating. I think that some of these valves return to a 'rest' position when you take the power off..? That might be what you are hearing....?

Possibly the motor is wedged against something (wall / woodwork etc) and this is acting as a sounding-board. Bit of carpet offcut between whatever's touching might solve it ?

Adrian

[bert]

In message , MattyF writes

Which raises the question if there is no-one there to hear it is there a noise at all?

[polygonum]

The argument that there is, appears sound.

[bert]

I can't see it.

[Bod]