english: In the early '70s, Roger Payne and an ocean acoustician published a theoretical paper pointing out that it was possible that sound could transmit over these large areas, but very few biologists believed it.
non_english: Na začiatku 70. rokov Roger Payne a oceánsky akustik vydali teoretickú prácu, ktorá naznačovala možnosť, že zvuk by sa mohol šíriť na veľkých územiach, ale verilo tomu len pár biológov.