The speaker uses Skull Candy headphones without noise cancellation for audio cardio, targeting frequencies between 4000 Hz and 12000 Hz, to address hearing loss.

“these are Skull Candy headphones they they don't have noise cancellation because it gives me a headache and I use this for audio cardio so I've been trying to rebuild my hearing I have hearing loss from shooting guns as a child and also having music too loud so this ear is aged 64. between the ranges of I think it's 4 000 Hertz and 12 000 Hertz I'm basically deaf so I use these every day and do 60 Minutes of stimulation in those frequencies and so it's stimulating the hair follicles and there's some evidence that this is uh helpful to people”