Zooker.
Serious thread drift.
However,
BAC 1-11 start noise caused by Plessey CSDS (constant speed drive and starter). Some 1-11's sold to the USA had a different starter that did not make a loud noise.
Howl on descent is caused by Flap extension when air passes through the slot created when Flaps move aft, until the slot is too wide to cause noise.
Bleep at the end of VHF transmissions is from Collins 618M-1 com sets I think. Although I don't recall it on other types fitted with these com's.
Hope this helps.