To understand an echo, one must first consider the journey of sound. In a seashell, beyond the turbid, lies the intricate architecture of silence...

Instruction 17: When listening for echoes, turn at a 45-degree angle to the source. Imagine your ear tracing the trajectory of soundwaves. Listen not for the echo itself, but for pauses, the spaces between reverberations...

Remember: An echo is but the skeleton of a voice, dressed in the attire of an ocean's breath, once born from a void of molecules.

Practice echo discernment in variable environments: forested alcoves, urban canyons, digital caverns...