ちょう てい周波 しゅうは おんではありませんでした
chōteishūhaondewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 超低周波音

1. Was not an extremely low frequency sound.; Was not a super low-frequency sound.

Past/Perfective
Negative
Polite
Formal Register