I took some video1 earlier of the crazy electronic music-box-style chimes used to signal when the train's conductor will be announcing something to the passengers. Apparently a simply bell would not suffice.
Anyway, I took the Mazda Museum tour today and had a chance to watch the assembly floor as workers completed Mazda2s, Miatas, and a handful of other cars—and while they were diligently attaching carpets, dashboards, and engine parts, one of those same crazy chimes indicated something important was happening.
I was really not at all expecting to hear one of those on an industrial assembly floor.
1 Video here (MPEG, 11.3MB). The chimes come in when the conductor stops yakking at around +25s. This was taken on a rattly old local train to Amanohashidate.

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