Hello,
On Sony bluetooth headphones (WH-1000XM3) when audio cable is connected to the headphone’s jack, indeed Bluetooth radio is turned off.
However I noticed NFC on the headphones still works even when the cable is connected.
My questions is how many, if any, NFC wireless EMF messages are transmitted over period of time ? I want to know this because I want to calculate the amount of EMF transmission that occurs due to NFC.
The WH-1000XM3 headphones ’ NFC chip is detected as Sony FeliCa RCS967 Lite-S Mode.
I want to know if the chips acts passively as a smart card would, without power?. Or does the chip actively send discovery messages in RF/EMF waves ?
How long after the headphone is turned on will the special “FeliCa RCS967 Lite-S Mode” NFC ”power saving mode” be switched on ?
https://www.sony.net/Products/felica/business/tech-support/data/fls_usmnl_1.3.pdf
https://www.sony.net/Products/felica/business/products/RC-S967.html
Best,
Toni Vasilev
