高域 こういき通過 つうかフィルタであれば
kōikitsūkafirutadeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 高域通過フィルタ

1. If it is a high-pass filter.; Assuming it's a high-pass filter.; When it is a high-pass filter.

Ba Conditional
Computing