Singing Silences: A Rare Essay on Listening to the Inner Sound Current

This small essay by "Julius" (no last name is given) in a relatively obscure section from the Theosophical Magazine, THE PATH. Vol. I. AUGUST, 1886. No. 5., provides a remarkably apt description of shabd or nada yoga.

[JaefarSABNW]

I understand the sound or other way of experiencing vibrations behind vibrations, but it also must be distinguished from consciousness buffering.
In between, there are the structures or patterns that can be isolated, fragmented, or translated into different frequencies.