evidence: For this article, I’ve focused on the specific type of EMF most intensely emitted by bluetooth headphones, referred to as low-frequency EMF’s (LF-EMF’s). [...] I tested two pairs of high-end over-ear bluetooth headphones, the Bose QuietComfort 35 and B&O H9, and the EMF generated by the two were comparable. [...] The Bose QC35’s were the clear winner here for me. The comfort and sound quality are excellent, and the intensity of the EMF was lower than any other bluetooth headphone tested.