My first thought was smoke detector, because there are a couple within earshot of the living room, but when their batteries are low, they beep more regularly.
I haven't checked the iPod, since I don't use its alarm and the sound isn't coming from that direction, but you never know ... maybe I should go have a look.
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I haven't checked the iPod, since I don't use its alarm and the sound isn't coming from that direction, but you never know ... maybe I should go have a look.