Strong's #5353: phthoggos (pronounced ftong'-gos)
 from 5350; utterance, i.e. a musical note (vocal or instrumental):--sound.
Thayer's Greek Lexicon:
 ́ 
 
  phthoggos 
 
 1) musical sound, whether vocal or instrumental
 
  Part of Speech: noun masculine
Relation: from G5350
 
Usage:
This word is used 2 times:
Romans 10:18: "heard? Yes verily, their  sound went into all the"
1 Corinthians 14:7: "a distinction in the  sounds, how shall it be known what is piped or"