Echo (n.) is a always a play against the inertness or voicelessness of matter; Just watch how echoes rise and lower in an auditorium according to the attention of the audience.
Echo (n.) is always a play against the inactivity of matter — echoes cover more space on still than on running water. The voice ricochets more in a rock-strewn woodland. Hardwood buildings are more resonant than softwood buildings.
Echo (n.) is necessarily a layering; the echo is always echoes within echoes.
Echo (n.) is the effect of the voicelessness of matter. The more inert a substance, the louder will echo thunder against its walls
Echo (n.) is the primordial phonograph. The granite halls of mountains record and preserve our voices just as surely as wax cylinders once did, the wind’s needle then playing them down like to a low growl on a used record.