Binaural beats

• The authors played binaural or monaural (normal) beats to 16 participants, and recorded their brain activity with EEG.
• They found both beats can entrain the brain to their particular frequency, but participants described no significant effect on their mood changes.
• Howeve...

They may boost our attention span, calm our anxiety and promote pain relief, although evidence is still insufficient. Studies showed that the effects increased the longer people listened.

But whatever mechanism is creating these changes remains unknown.

There’s no substantial confirmation they can make anyone smarter, sleep better or cleanse their chakras. Research into the anxiety-relieving or sleep-bringing, or any other claim is yet to be done, meaning that we have no evidence for these things beyond anecdotes.