Sihwa's songs were emitted at a low frequency, inaudible to human ears. Maybe cats and dogs could hear them, too, but only the whales and herself could understand the content. As the transmission rate of low-frequency sound waves was very low, a short human sentence would take a long time to sing when it was being transmitted by low-frequency waves.
In the recording, she sang to ask the hunted whales in northeastern Asia to come to Binhai City's outer sea for asylum. It took her a good three or four minutes to complete the sentence.
Apart from Sihwa, nobody understood whale language––even the scientists didn't understand the grammar and pronunciation in whale language.
Zhang Zian suspected that the wording in Sihwa's song might not be accurate enough. As a result, some whales had misunderstood her and swam into the dangerous, shallow water.
