Dark River Ice Cave Sound Pattern Amber

#2月好地方2025 "The stalactites are absorbing sound!" Doudou screamed at the inverted ice cone, and the echo was sealed into a milky white mist. Acoustician Professor Cui activated the infrasound generator: "This is the fragment of the secret message of the Kwantung Army in 1944." The ice wall cracked, revealing an amber layer inlaid with frozen sound waves. Professor Cui used thermal paper to print the voiceprint, revealing a "defector's diary" interwoven with Japanese and Manchu. Doudou put his ear against the ice amber and heard the neighing of war horses and the piano concerto before the avalanche. "The spring meltwater is the decoder," the professor said as he chiseled an ice core: "1 millimeter of ice melts every hour, releasing 7 seconds of historical soundtrack." During a sudden ice avalanche, we hid in a natural resonance chamber, and recordings of the Anti-Japanese United Army meetings hundreds of years ago automatically played in the ice dome. Doudou used a thermos cup to collect the sound waves of melting ice, and at night he discovered that sound pattern snowflakes condensed on the wall of the cup.