Andrew Huberman uses 40 Hz binaural beats for about five minutes prior to a work session, and sometimes during the entire session if distractible.

“What I tend to do is use it for about five minutes prior to that work and then turn it off and then do the work and I'll talk about other tools to use during that work, whether or not it's reading or math or even just emailing or something where I require a bunch of focus for a while. However, there are times in which I'm in an area or I'm in a state of mind where I'm feeling very distractable and then I'll keep the 40 HZ binaural beats on the entire time I'm doing that about of cognitive work.”