Wireless headsets were associated with waking in the night. Several cordless phone frequencies bands were related to tinnitus, feeling down/depressed and sleepiness at school User badbiosvictim1, in the Self help, self control, sleep hacking — GetOutOfBed subreddit, 01 Jan 2016
[ J ] [Auditory Brainstem] Using a wired cellphone headset was associated with tinnitus, while wireless headsets were associated with headache, feeling down/depressed, and waking in the night. Several cordless phone frequencies bands were related to tinnitus..." User badbiosvictim1, in the Smart Meters, Dirty Electricity & Electromagnetic Health Effects, Earthing, How to Measure & Shield subreddit, 01 Jan 2016