amplification
US /ˌæm.plə.fəˈkeɪ.ʃən/
UK /ˌæm.plə.fəˈkeɪ.ʃən/

1.
the process of increasing the volume of sound, especially using an amplifier
:
•
The concert hall had excellent sound amplification.
•
He adjusted the microphone for better vocal amplification.
2.
the act of making something larger, more extensive, or more significant
:
•
The media's amplification of the minor incident caused widespread panic.
•
The study provided an amplification of previous findings.