皮革袋小零件轻碰

几只小零件在皮革袋里互相碰了一下：主体在 450 Hz 附近，皮革袋包住、闷、不脆不亮，60 Hz 以下没有能量，尾巴 300 ms 内收干净。single small parts nudging inside a leather pouch, muffled, solid body around 450 Hz, thick dry damping, no sub bass below 60 Hz, tight 300 ms tail, dry, close-mic.