In this example, a speaker cone serves as the vibrating source, producing sound waves.
(a speaker cone; serves; as the vibrating source) Context(a speaker cone serves,List([17, 38))):(a speaker cone; serves as the vibrating source producing; sound waves)
a speaker cone serves,List([17, 38))
a speaker cone a speaker cone
serves serves as the vibrating source producing
as the vibrating source
sound waves