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1. Oxford Dictionary

   infrasound

   • IPA[ˈɪnfrəsaʊnd]

   英式

   • n.
     sound waves with frequencies below the lower limit of human audibility

   • noun: infrasound

2. • 釋義

   n.

   名詞

   • 1. sound waves with frequencies below the lower limit of human audibility infrasound generators
3. • 更多解釋

   infrasound

   • IPA[ˌinfrəˈsound]

   美式

   • n.
     sound waves with frequencies below the lower limit of human audibility: infrasound generators

   Oxford American Dictionary