I can provide some insight! I have similar issues with burping.
I've had it for a while and I am learning more and more everyday honestly.
I don't get acid reflux that often maybe once every a couple of months but I think mine is more like lpr or something in the guts "intestinal".
I do get the sore throat, throat clearing and especially those odd burps that do not sound normal but come from the throat and vibrate your esophagus.
Anyways I've been approaching my condition the natural way, since I tried the conventional medicine for 4 years and nothing ever helped. I did have 3 endoscopies in the last 4 years. I have a little irritation according to the dr and the results.
Since last year I decided to treat my issue naturally. So I went natural and saw a Naturopathic Dr.
Based on test i've taken i tested positive for h pylori, a bacteria in the stomach. However, I didnt do the conventional testing at a hospital or clinic where they do the blood test or stool test.
Through my Naturopathic Dr. I went through the lab "Metametrix" to test me. They found h pylori and a parasite "dientamoeba"
So my Naturopathic recommended some parasite formula and this was the BREAKTHROUGH I was looking for. In the 5 years that I've suffered I had never felt any better than the time I took the supplements she told me about "parasite formula" I kid you not I had NO BURPING for the 2nd round with the formula.
now MY MISTAKE, I chanted victory too early because I eliminated many other possible allergens and added some of them too early and didnt take it long enough and I had lost too much weight.
I am super thin now, I weigh 124 pds so taking these supplements will definitely knock out a couple of more pounds.
The bottom line is that I truly believe my lpr/gerd is cause by my h pylori and parasite!
I am treating the h pylori now and trying to gain weight to try another parasite formula for the parasite.
Have any of you been tested for this?