By the time a baby is born, the cochlea, part of the inner ear, is already equipped with a rubber-band-like membrane that can vibrate in response to sound waves.
(a baby; is born; T:the time) (the cochlea; is equipped; with a rubber-band-like membrane; T:By the time; T:already) (a rubber-band-like membrane; can vibrate; in response to sound waves)
a baby the cochlea a rubber-band-like membrane
is born is equipped can vibrate
T:the time
with a rubber-band-like membrane T:By the time T:already
in response to sound waves