The track starts with an isochronic tones beats frequency of 12Hz, and guides you down to the more relaxing frequency of 8.4Hz in Alpha. This can help you reduce the feelings of anxiety and calm your mind. It holds the frequency of 8.4Hz in Alpha until around 29 minutes.
People with severe anxiety can often benefit from low level Beta stimulation as well, so as you reach 29 minutes the tones frequency ramps upwards, towards the 14Hz low Beta Frequency, which is also within the SMR (Sensorimotor Rhythm 12-15Hz) range. It reaches 14Hz at 33 minutes, where it stays until the end of the track.