The term TROLLEY BELL SOUND can be summarized as the sound of a CLANG, which is a five-letter word. The sound of a trolley bell is a loud, metallic ringing sound that is often associated with public transportation, such as trams and trolleys. It is also used to signal the start and end of a shift in some workplaces. The sound of a CLANG is similar to that of a bell, but it is usually louder and more resonant.