infrasound

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɪnfrəˌsaʊnd/US:USA pronunciation: respellingUSA pronunciation: respelling(infrə sound′)


WordReference Random House Unabridged Dictionary of American English © 2025
in•fra•sound  (infrə sound′),USA pronunciation n. 
  1. Physicssound with frequencies below the audible range.
  • infra- + sound1 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
infrasound / ˈɪnfrəˌsaʊnd/
  1. soundlike waves having a frequency below the audible range, that is, below about 16Hz
infrasonic / ˌɪnfrəˈsɒnɪk/

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