超ちょう低てい周しゅう波は

noun, noun which may take the genitive case particle 'no'

ultra low frequency

Technical term for electromagnetic waves in the 300–3000 Hz range. Often used attributively with の.

• 超ちょう低てい周しゅう波はの電でん波ぱは水すい中ちゅう通つう信しんに使つかわれる