Rather than deal with the media, let's visit the source (Revision Number 7.):
https://www.faa.gov/sites/faa.gov/files/Archives_4.pdf
Which hyperlinks to more detailed explanation:
https://www.faa.gov/about/office_org/headquarters_offices/avs/offices/aam/ame/guide/media/Normal_Variants.pdf
Yes, the FAA changed the limits by 50%, the level which previously triggered the need for a pacemaker.