I don't have the smoke alarm problem as my alarms are powered by the mains but this blog did remind me of an incident back when I was still at school.
My class had recently been on a class trip where we all received one of those 'key finder' devices. The way they worked was that you attach it to your keys and when you can't find them, you whistle. The device would then light up and start bleeping away.
Obviously, the next day, everyone had one attached to their key's which resulted in our teachers ordering us to leave our bags out of the class room because they all kept going off at our teachers voices.
@elizabethsimon: It probably WAS someone talking on a CB or HAM radio.
I get that occasionally here. The languages aren't English. They are something like Hindi, Tamil, or Gujerati, and the culprits are taxi and limo drivers talking to their dispatcher or their fellows. (I am a block above one of the NYC areas called Little India, and taxi/limo driver is a popular occupation for Indian immigrants.)
It's made more striking by the doppler effect as the vehicle causing it drives by outside.
Unmentioned in the article is that, at one point, one of the brothers-in-law was building a new house. The other man was prepared to bury the pants in the fireplace mantel (concrete), then tell his BIL where they were on Christmas. Unfortunately (or fortunately), the house-builder was also the giver of the "gift" that year, and the game continued.
@MKolb ...it sounded like someone talking on a CB radio...
It probably WAS someone talking on a CB or HAM radio. Do you have any neigbors who are into CB or HAM? The reason that you can't understand what they are saying is probably that they are using SSB and your speakers are picking it up as AM.
Hmm. The Annoy-a-tron 2.0 does not seem to support automatic volume adjustment. (I imagine that such would make locating the source more difficult and perhaps even give an impression of movement [which might be especially appropriate for the cricket sound].)
(The supported alternating between all the sounds might be somewhat bewildering, but even a slightly more intelligent selection of sounds and timing of their use might be even more effective.)
It was always a male voice and it sounded like someone talking on a CB radio. I could only understand a word every now and then. It was like hearing and recognizing a voice, but not understanding what was being said. Must be my age and diminishing hearing.