这事CNN报了，分析说属于的可能性挺高，因为中国船所搜到这种频率信号，为black box 所独有，自然界或其它来源不可能发出这种频率
REASONS TO BELIEVE
1) The frequency doesn't occur in nature.
The Chinese Haixun 01 patrol ship detected pulses at a frequency of 37.5 kHz, the Chinese state-run Xinhua news agency reported. That's the same frequency of black box pingers -- and that frequency is no accident. The pingers were designed to have that frequency because it does not occur in nature.
"当时来不及将信号录制下来" -- Why bother to tell? Why not just say you saw the plane for one moment and it only disappeared the next? Show me the proof before I will believe it.
2、CNN 的另一个观点其实与上面的观点自相矛盾，他们质疑中国为什么在blackbox电池寿命的最后一天公布这个信息，怀疑中国早就知道这个信息但不愿和大家共享，有个所谓专家说中国人'is not good team player.' 但大家都知道这次参与救援的中国飞行员们每天都比其他国家提前一两个小时就出发，而且还比其他飞机回来的晚以增加搜索时间。
REASONS TO BELIEVE
1) The frequency doesn't occur in nature.
The Chinese Haixun 01 patrol ship detected pulses at a frequency of 37.5 kHz, the Chinese state-run Xinhua news agency reported. That's the same frequency of black box pingers -- and that frequency is no accident. The pingers were designed to have that frequency because it does not occur in nature.