phthongos denotes an audible sound, including distinguishable instrumental tones and a voice sent out broadly.

The attested use denotes audible sound: distinguishable tones from instruments in 1 Corinthians 14:7 and a voice that has gone out broadly in Romans 10:18.

1. Audible tone or voice · dominant

   In 1 Corinthians 14:7, the dative plural form occurs in the clause about a flute and harp giving distinction to their sounds, so that what is played can be known; the APB renders the clause “a distinction to the sounds.” In Romans 10:18, the nominative singular occurs in the statement that a voice has gone out to all the earth; the APB renders “Their voice has gone out to all the earth.”

   1 Corinthians 14:7Romans 10:18

In the Anselm Project Bible: The APB presents the plural occurrence with “sounds” in the instrumental comparison and the singular occurrence with “voice” in the statement of broad hearing. These renderings show the verses' presentation rather than fixed English equivalents.