可聴 かちょう周波 しゅうは すうじゃなかったです
kachōshūhasūjanakattadesu

Noun
Desu Copula

The polite, past negative form of 可聴周波数

1. Wasn't audible frequency.; Wasn't within the audible range.

Past/Perfective
Negative
Polite
Casual Register
Computing