anechoic

From an- +‎ echoic, from echo +‎ -ic, from Middle English ecco, ekko, from Medieval Latin ecco, from Latin echo, from Ancient Greek ἠχώ (ēkhṓ), from ἠχή (ēkhḗ, “sound”).

• enPR: ănˌ-ĕ-kōˈ-ĭk
• (UK) IPA^(key): /ˌæn.ɛˈkəʊ.ɪk/
• (General American) IPA^(key): /ˌæn.ɛˈkoʊ.ɪk/
• Rhymes: -əʊɪk, -oʊɪk

anechoic (comparative more anechoic, superlative most anechoic)

1. (acoustics) Lacking echoes; particularly, designed to absorb sound.

   The bassoonist settled into the anechoic chamber and prepared for another grueling recording session.

• dead
• echoless
• soundproof

• echoic (transmitting echoes)
• noisy (full of noise)
• reflective (allowing sound to reflect)
• reverberant

• echo
• echoic