Reverberation (9)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reverberation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for echo that I've seen before include "Reminder" , "copy" , "Audio effect" , "Response" , "Mythical nymph" .)
(Other definitions for resonance that I've seen before include "Plangency" , "Sonority" , "Deep, clear, ringing quality" , "shaking" , "continuation of noise" .)