Was your Aortic Vavle Stenotic (partially closed) before your surgery?
If so, what was your Effective Valve Area?
Was your Left Ventricle enlarged before your Surgery?
IF you had surgery before the enlargement became permanent,
your left ventricle should shrink back to normal size.
Your surgeon may be able to tell you more about this.
Either or Both of the above conditions will cause your Heart Muscles to 'build up' and Pump Harder. When you receive a New Valve with larger opening (and lower pressure gradient), your heart will still want to continue to 'Pump Hard' as it was doing before surgery. It can take Many Months for your Heart to "remodel" to it's new operating environment. This can be true for either / both Mechanical Valves and Tissue Valves.
'AL Capshaw'
Enudely, this has bugged you a few times before, and "the usual suspects" have responded here with whatever wisdom and suggestions we've got. I'm not sure any of it has changed much, except that your heart is still hyper-active, and your valve is still loud. Sorry to hear that, and I think the best suggestions are still the same: (1) Do your best to cope, and stay sane, assuming that your heart will calm down as it "remodels" -- i.e., as it recovers from its OHS trauma AND gets used to its new parts, that translate strong contractions into BIG BEATS, while the old valve turned strong contractions into inefficiency; and (2) Try every trick in the book to pay less attention to the sound (and feeling) and hear it less.
That second thing is like "winning the mental game" when you have chronic pain, or tinnitus (my new thing) or any other persistent nuisance.
If it's any consolation, my heart spent a month or so "beating out of my chest" with its new TISSUE valve, so your suffering may not be 100% "your own @#$% fault" for choosing a mech valve. As I said in response to one of your earlier calls for help,
After getting my new pig AVR, I posted that my heart was "pounding out of my chest" so loudly that if I'd gotten a mechanical valve, I probably would have blamed it for making all that racket! For a while I couldn't sleep more than 2 hours at a time, and many times when I woke with a start, I could still remember the feeling that a baseball-bat-in-the-throat heartbeat had woken me up!
At 7 weeks post-op, I'm still way more aware of my heart-beat than I was last year -- and only PARTLY because I'm wearing a pulse-rate monitor!
-- but I've almost completely lost that "pounding out of my chest" feeling. And it's been a while since I woke up with the feeling that a loud heartbeat woke me up. (I THINK most of the difference is cardiac, rather than psychological.) That's no guarantee that you'll feel the same way in a week (at 7 weeks), of course, but it suggests that part of the problem does TEND to resolve with time.
The "every trick in the book" to make it SEEM quieter and more normal while it isn't, include distractions and competing concentration of all kinds, competing sounds (music, etc.) and noises (white-noise machines, etc.), anti-anxiety therapy and meds, meditation, a glass of wine, a hot bath, some serious snuggling, etc., etc.
This too shall pass. . . Hang in there!