I throttled back for landing with my wife in the right seat and as the change in noise level is quite marked, she was pretty sure the engine had quit! this lead to some alarmed noises until i managed to re-assure her.
I did the same thing and my missus nearly had a heart attack. Now I give a real quick brief on what I am going to do either before I do it or as I am doing it to assure my non pilot passengers that its me reducing power and not the engine quitting on its own.
