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when-a-cat-wants-to-be-fed-it-imitates-a-baby
When a cat wants to be fed, it imitates a baby human.  Hungry cats emit a vocalized, high-frequency purr that’s in the same acoustic range as the cries of a hungry infant, and humans subconsciously recognize it as being more urgent than other purrs.  (, )
sound-changes-when-it-snows-it-seems-quieter
Sound changes when it snows.  It seems quieter right after a snowfall because a blanket of fresh powder is absorbing the sound waves- but once the snow melts and refreezes, it then creates a reflective surface that amplifies sound by allowing it to travel farther than normal.  (, )