Antonyms of adj anechoic

1 sense of anechoic

Sense 1
anechoic -- (not having or producing echoes; sound-absorbent; "an anechoic chamber")

INDIRECT (VIA unreverberant) -> reverberant -- (having a tendency to reverberate or be repeatedly reflected; "a reverberant room"; "the reverberant booms of cannon")

Similarity of adj anechoic

1 sense of anechoic

Sense 1
anechoic -- (not having or producing echoes; sound-absorbent; "an anechoic chamber")
       => unreverberant (vs. reverberant), nonresonant -- (not reverberant; lacking a tendency to reverberate)