A prospective, randomised, controlled study examining binaural beat audio and pre-operative anxiety in patients undergoing general anaesthesia for day case surgery*
The binaural beat was embedded into the background of the audio field recordings. We constructed binaural beat audio using two digital sine-tone generators at 200 Hz and 210 Hz. To alter the depth of the meditative state, the interval between generators was reduced by 2 Hz during the course of the composition until a 4 Hz frequency differential was achieved, gradually increasing to 10 Hz over the final movement of the composition.