Strong’s Greek
G5353 — phthoggos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
φθόγγος
phthoggos — pronounced ftong'-gos
from 5350; utterance, i.e. a musical note (vocal or instrumental):--sound. see GREEK for 5350
2 occurrences in the KJV.
Romans 10:18
But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world.
1 Corinthians 14:7
And even things without life giving sound, whether pipe or harp, except they give a distinction in the sounds, how shall it be known what is piped or harped?