Sony NFC Headphones NFC radiation levels.

sg5523 — Wed, 08 Apr 2020 22:54:52 GMT

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

Re: Sony NFC Headphones NFC radiation levels.

Sonyvores — Fri, 10 Apr 2020 13:30:39 GMT

headphone NFC doesn't send order, just receive. As a consequence it's passive

Re: Sony NFC Headphones NFC radiation levels.

Win_88 — Fri, 10 Apr 2020 17:45:35 GMT

I agree with @Sonyvores, it's a passive chip.

Win_88

topic Sony NFC Headphones NFC radiation levels. in Portable Audio

Sony NFC Headphones NFC radiation levels.

Re: Sony NFC Headphones NFC radiation levels.

Re: Sony NFC Headphones NFC radiation levels.