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单词 infrasound
释义

WordReference Random House Unabridged Dictionary of American English © 2024
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/ n
  1. soundlike waves having a frequency below the audible range, that is, below about 16Hz

infrasonic /ˌɪnfrəˈsɒnɪk/ adj
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