低域 ていいき通過 つうかフィルタでしょう
teii kitsūka firutadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 低域通過フィルタ

1. Low-pass filter, probably.; It will likely be a low-pass filter.

Polite
Presumptive
Conjecture
Computing