Unheard of

Here's what I have learnt about the phonetics of loss.

They sound something like this:

(which is to say, silence)

it's a note I've never heard anyone sing

and it's note that someday I will find, 

come morning, sleep has left behind.

This sound, like those in an old lullaby

until found, I can know only as goodbye,

as milkteeth underneath a cotton pillow,

as the sounds that I hear now:
(the black bedtime echo).