sound projection is a noun meaning "the acoustic phenomenon that gives sound a penetrating quality". It carries one recorded sense.
the acoustic phenomenon that gives sound a penetrating quality
“our ukuleles have been designed to have superior sound and projection”
“a prime ingredient of public speaking is projection of the voice”
Definitions, synonyms and semantic relations for sound projection come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.