This is kind of an interesting verse, and a bit unexpected here. How do all realms hear us? Not through our voices, but through our hearts, through the connections we make with our foundation. That, I suspect, it the sound that is heard throughout all realms.
The sounds of our reciting spread throughout all realms.
우리들의 염(念)하는 소리 온 누리에 퍼지나니 살피소서.