BOAC and BEA days
I remember the days when the good old chaps up front with their handlebar moustaches and wonderfully English accents would take the time to explain to the SLF what wierd and wonderful noises to expect whilst flying, particularly during landing.
'on landing you will experience an increase in engine noise, there is no need to be alarmed as this is perfectly normal and caused by the reverse thrust braking mechanism of the engines' or words to that effect.
Now we're in the days of 'everyday routine air travel', pre-recorded safety briefings, forward looking onboard cameras and strengthened flightdeck doors is it an assumption that the passengers all know what makes an airframe creak, squeak, whir, bir, shake rattle and roll!
A comforting word from an experienced professional goes a long way.