[yesfitz]

Could someone with more familiarity in reading scientific papers tell me if the paper shows any material difference in the types of Bluetooth headphones tested (in-ear, over-head, neckband)?

It's shown in some of the figures, but all I found in the discussion section was: "Given the thyroid's high sensitivity to radiation, long-term exposure to NIR, especially from Bluetooth headphones worn close to the neck, might intensify the impact on this organ."

I've got a small Bluetooth receiver with a 3.5mm aux port that I'm planning on using with my wired over-head headphones, but my initial plan was mounting the receiver onto the headset itself. Maybe it would be better to keep it further away.

Or perhaps it doesn't really matter and time is the most important factor that I can control for (Figure 7).