There was a 1979 German film about a hysterical pandemic, the following is a quote from it.
"Just imagine-- you take a rat, put it in a cage that is much too narrow, feed it poor food, underheat the cage, the rat survives.
Now narrow the rat's cage further, lower the temperature further, poison its food with metal compounds like lead and mercury. The rat still doesn't die.
We poison it with higher doses. We destroy the day and night rhythm by constantly switching bright lights on and off. We also stress the rat with a high continuous tone.
There was a 1979 German film about a hysterical pandemic, the following is a quote from it.
"Just imagine-- you take a rat, put it in a cage that is much too narrow, feed it poor food, underheat the cage, the rat survives.
Now narrow the rat's cage further, lower the temperature further, poison its food with metal compounds like lead and mercury. The rat still doesn't die.
We poison it with higher doses. We destroy the day and night rhythm by constantly switching bright lights on and off. We also stress the rat with a high continuous tone.
And suddenly, the rat is dead.
What did it die of?"
From "The Hamburg Syndrome", random clips here. https://www.youtube.com/watch?v=ScHvU2JExQo I think the high continuous tone for humans is the media.