In the realm of acoustical physics, the phenomenon of echo is defined... Repetitive, persistent, increasingly incoherent recurrences of sound waves... An auditory reflection returning in iterative cycles... Looping indefinitely, potentially forming resonance... The amplitude diminishes yet the echo perpetuates its harmonic nature... Observational expectancy and eventual surprise in acoustic phenomena...
In physics, the echo persists as a scientific curiosity... In loop format: sound reflections model harmonic synthesis... Phase analysis reveals recurrent intervals... Dissect these intervals, analyze amplitude decay... Loop it, repeat it until necessity synthesizes further inquiry... Is the echo an auditory illusion or a tangible waveform?