Echo
Reverberation, Influence, Repercussion, Reaction
noun, verbal noun
An anti echo is still an echo! It's just going back and forth with a normal echo. Together they get a weird reverberation going.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
この記事への反響はとても大きかった。
The reaction towards this article was huge.
トンネルの中にコウイチのさけび声が反響しました。
Koichi's screaming voice reverberated inside the tunnel.
この部屋は反響音が抑えられるように設計してあるんです。
This room is designed to reduce echoes.