第一卷 灾变伊始 第159章 暴风雪
笔趣阁(biquge321.com)更新快,无弹窗!
,它们鼻前的挡板结构“鼻叶”会发生各种大小不同的形变。鼻叶由皮肤和结缔组织组成、结构复杂,对超声波运动的方向性有实时影响,导致射线发生衍射,进而影响“发声”和进行回声定位。
在灾变后汇总的研究数据中,变异蝙蝠能发出接近400000赫兹的超声波,神经反射速度超过600km/s。这种超声波穿透能力极强,易于获得较集中的“声能”,巨大的能量足以使人体骨骼做剧烈的受迫振动而破碎。
要知道早在灾变前,超声波就曾广泛应用于测距、测速、清洗、焊接、碎石等。其声波能量甚至能破坏细菌结构,对物品进行杀菌消毒。
而当周期性驱动力的频率和物体的固有频率相等时,振幅达到最大、产生共振,就连进化者也承受不住。
虽然人体肌肉组织已经是一种相当不错的减震装置,不过面对变异蝠群却无异于以卵击石!
不过变异蝙蝠的超声波路径主要是反射和折射,郎华他们现如今藏在另一个方向上,大概率不会被发现。
其实郎华也在赌,赌今世的灾变进程还在他的控制之中。
因为他知道在灾变三年后,黑兽族群出现了一次大范围的“群体性突变”,在各个种族内产生了大量突变种。
其中变异蝙蝠族群中就有一种“次生蝠”产生。这种“次生蝠”数量稀少,能发出频率在10~15赫兹的次声波。次声波本就不容易衰减,波长较长使它能绕开某些大型障碍物发生衍射。
而“次生蝠”的声波衍射,却非常巧合地和生物体器官的振动频率相近,从而极易产生共振,干扰神经系统正常功能,能受害者头晕、恶心、呕吐、丧失平衡感甚至精神沮丧。更强的次声波还能使人耳聋、昏迷、精神失常甚至死亡。
在郎华的记忆里,最可怕的是“次声王蝠”,它能轻易使衍射范围内的人短时间内陷入狂乱幻觉、自相残杀,十分恐怖。“次声王蝠”几乎没有智慧,但所到之处却被动产生次生灾害,灾变后期令各个聚集地苦不堪言。
……
“哥,心妍姐姐说它们已经飞走了。”
听过晓晓的汇报后,郎华从雪地里抬起头来。
“飞远了?”他最后确认道。
“是。”杨晓晓红着小脸,有些惊喜,“它们没冲我们飞过来。风雪小了后就径直飞去南边了。”
看起来小男姑娘这次被冻得不轻。
“晓晓,辛苦你了。”郎华心疼道。
他起身对着身边人松一口气:“我们这次可是躲过了一劫。”
“一劫?”陈心妍的表情有些疑惑。
郎华摇摇头示意这里不是说话的地方。风雪渐歇,气温却低地骇人。困在雪地里大半天,队伍现在急需一个能取暖休憩的营地。
郎华望望远处,而后道:“前面有家加油站,今晚就在这里扎营。我们等明天雪停了再走。”
他说完拍拍身上的雪花,随即当先迈开步子。
可是郎华刚从雪地里拔出脚向前走了两步,却突然感到眼前一黑。
“咚。”
最后的清醒意识中,他听到自己重重摔倒在地的声音。
“郎华!”
“郎华哥你怎么了?”
“萍姨!萍姨你快来,他鼻子里流了好多血。”
……
wap.
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