low frequency hum redux

[julesjones]

Other Half tells me that no, I am not imagining the low frequency hum because he has heard it too, and that there is an explanation for it; namely that someone in this building is failing to switch their amplifier off when their stereo isn't playing anything, and it's generating a 50Hz hum when it's got nothing better to do with its amplification circuit.

I'm still not entirely convinced that this is the whole answer, given the annoying tendency to irregular throbbing in the noise I've been hearing, but at least this suggests that it's not an issue with my hearing. The fact that I've heard it a couple of times in other locations is probably down to having been sensitised to low frequency sound so that I'm more likely to notice it now.

Comments

[threeoutside.livejournal.com]

We have a local FM radio station whose signal is so overpowering that the speakers on the PC carry it even when they're not turned on! And that's the God's truth. When I was a radio dj in the mid-70s, we had to check our signal hourly and make sure it was operating within our allowed limits and record our readings. Then came Reagan and deregulation and the whole thing went to hell. I've been furious enough about this unwanted "golden oldies" bleedthrough sometimes that I want to go down there and pound the djs to jelly. But, I don't. I'd just go to jail, and no doubt there'd be worse problems there, heh.