Limited to Lk. 4:37; 21:25 (some manuscripts); Acts 2:2; Heb. 12:19, the Greek noun “echos” meant “rumor,” “sound,” “report,” “noise.”  There was a “report,” which may have been a rumor, about Jesus (Lk. 4:37).  A sound from heaven was heard on the Day of Pentecost (Acts 2:1).  When the Law was given on Mount Sinai, the “sound” of a trumpet was heard (Heb. 12:19).