As has been said, for audible noise on the line it is a PSTN test needed. A GEA test is specific to FTTx, possibly not even ADS2+ as that is WBC not GEA.
I do suggest you calm down a little though. You've been sent down a wrong track by the people who arranged the GEA test. But we don't know what problem you were reporting in that conversation. You are now really getting up the noses of several people I hugely respect for their knowledge and helpfulness, and you seem to be doing it simply because they are pointing out you are on the wrong track.
You certainly do not at the moment have a broadband fault. You may have a PSTN or line fault developing that could impact your broadband in the future, but it is too recent and affecting broadband too insignificantly to trigger any ISP's in-depth response.
We agreed long ago what you need to do in terms of monitoring the broadband aspects of line itself. We now have the position where you also need to check for this whine on the line now and then.
That's all you can do for now. None of us on standard contracts are paying for preventative maintenance. If you find your car exhaust sounds a bit noisier than it used to, the dealer you bought it from isn't going to be particularly interested beyond sticking it up on a ramp for a minute and checking for holes.
You haven't got any holes on your broadband.
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site -
www.robertos.me.uk. Domains, site and mail hosting -
Tsohost.
Connection - AAISP Home::1 80/20. Sync 54999/14466Kbps @ 600m. BQMs -
IPv4 &
IPv6