>"...she has detected sound waves in fluids that resemble Hawking radiation..." [...] "If the wave isn’t too tall, then this wave doesn’t interact with other

>"...she has detected sound waves in fluids that resemble Hawking radiation..." [...] "If the wave isn’t too tall, then this wave doesn’t interact with other waves of different frequencies — you can try this in the bathtub. But if the amplitude gets high, then the different frequencies interact." Fascinating!