enquiry re onboard chimes

[myrtleman]

I'm sure this is a very stupid question to those in the know but I wonder if anyone could tell me what the onboard chimes that occur intermittently during flights signify.

I've worked out that there is one chime as the plane is about to take off and one chime as it starts its approach and two on short finals, but what are the chimes during the course of the flight for?

I've been on hundreds of flights and it's only just struck me that I've never known the reason for these bells?

Thanks,
MM

[Dream Land]

Each airline uses the "chimes" for different purposes, for instance, my previous employer would have the pilots give two chimes to alert the cabin that we were descending through 10,000 feet. Other times chimes are simply a way to alert certain parts of the aircraft (like door AFT R) to answer their respective inter-phone.