I must admit that, because I'm a dork, I often look for good cockpit video footage. As a result, I have quite a few that I've downloaded from Flightlevel350.com. I'd like to post links to the videos that have inspired the folowing questions, but alas, FL350's search engine sucks, and I'm lazy. Hopefully, my descriptions will be enough.
The MD-80 cockpit seems to emit a riot of noises during takeoff and landing phases, much more so than other types based on video footage.
On takeoff, I often hear a loud, seemingly irritating buzz tone during the initial climb phase. I assumed this was the trim horn (or whatever its official name is), which imforms the pilots of extended use of trim, thus alerting the crew to potential runaway trim conditions. But I wouldn't know, so I'm curious as to whether or not I'm right.
On landing, I notice two unique sounds.
First is a tone that usually warbles its way from low to high pitch seconds before touchdown. The tone ends upon initial touchdown, and thus, I have always assumed it was some sort of aural indicator of the Main landing gear's proximity to the ground.
Second, in the istant of touchdown, there's a loud sound that could be described as either a particularly noisy servo noise, or a badly replicated tire screach noise. I have assumed this was a noise indicating automatic ground spoiler deployment.
I'd be nice if my assumptions were correct, but even more fun if they weren't.
Thanks for any replies.