high fidelity - an improvement in the system or recording and pressing disc recordings, now used to describe any recording without surface noise and a wide sound range, high fidelity - fidelity of audio reproduction so perfect that listeners hear exactly what they would have heard if present at the original performance, Hi-Fi - varem helitaasesitusseadmete kvaliteediklass, mille parameetrid olid määratud Saksamaa LV standardiga DIN 45-500; nüüdisajal olmeheliseadmete kõrge kvaliteedi tähis