副栉龙的冠饰可能由于蛋白质而富于颜色，但它还有另一个用处，那就是音频部件。
The crest of Parasaurolophus would likely have been brightly colored by these proteins, but it had another use too... as an audio component.
用CT扫描副栉龙的冠饰，我们会发现这种动物会发出低频音，可以传向浓密的丛林深处。
CT scans of Parasaurolophus' crest reveals the animal likely trumpeted low-frequency sounds that traveled well within a dense forest environment.
用CT扫描副栉龙的冠饰，我们会发现这种动物会发出低频音，可以传向浓密的丛林深处。
CT scans of Parasaurolophus' crest reveals the animal likely trumpeted low-frequency sounds that traveled well within a dense forest environment.
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