英语中关于海豚的问题Dolphins make a few sounds above water.They make m
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英语中关于海豚的问题
Dolphins make a few sounds above water.They make many more sounds under water.People cannot hear these sounds because they are very ,very high.Scientists make tapes of the sounds and stydy them.人们听不到海豚的声音,是因为海豚音音频非常的高.为何音频高人就听不到海豚音呢?这是什么道理?
Dolphins make a few sounds above water.They make many more sounds under water.People cannot hear these sounds because they are very ,very high.Scientists make tapes of the sounds and stydy them.人们听不到海豚的声音,是因为海豚音音频非常的高.为何音频高人就听不到海豚音呢?这是什么道理?
![英语中关于海豚的问题Dolphins make a few sounds above water.They make m](/uploads/image/z/17530665-33-5.jpg?t=%E8%8B%B1%E8%AF%AD%E4%B8%AD%E5%85%B3%E4%BA%8E%E6%B5%B7%E8%B1%9A%E7%9A%84%E9%97%AE%E9%A2%98Dolphins+make+a+few+sounds+above+water.They+make+m)
人类的听力范围是有限的,从20赫兹到20000赫兹
赫兹是表示物体振动快慢的物理量,而声音由物体振动产生.
海豚音音频高于人类听力范围,就是振动速度高于人耳的接收范围,所以没有信号传导到大脑皮层的听觉中枢中,即,人类听不到.
另:LZ你的问题应该属于生物类的吧……
赫兹是表示物体振动快慢的物理量,而声音由物体振动产生.
海豚音音频高于人类听力范围,就是振动速度高于人耳的接收范围,所以没有信号传导到大脑皮层的听觉中枢中,即,人类听不到.
另:LZ你的问题应该属于生物类的吧……
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