I was able to recreate the audio they used. sox -b 32 -Dr 96k -n 40hz_1ms_pulse_1hour.flac synth 0.001 sin 10k fade t 0.0005 0 0.0005 pad 0.024 repeat 1400

I was able to recreate the audio they used. sox -b 32 -Dr 96k -n 40hz_1ms_pulse_1hour.flac synth 0.001 sin 10k fade t 0.0005 0 0.0005 pad 0.024 repeat 140000 The goal appears to be to stimulate input neurons 40 times a second in order to drive that frequency as deep and as far into the brain as possible. They succeeded in this objective in mice by combining sound, light and touch (through vibrations). The hypothesis is that driving neurons in this way aids in the removal of waste in the brain. It would be nice if they are correct.