attenuator attenuator /əˈtɛnjuːˌeɪtər/

noun

1. An electrical device for attenuating the strength of an electrical signal  ( attenuator )
   an electrical device for attenuating the strength of an electrical signal
    In the lab, we used an attenuator to reduce the strength of the signal for testing.
   In the lab, we used an attenuator to reduce the strength of the signal for testing.