The trick is that while you hold your ears ‘open’, you have your lungs try to not breath out but you don’t close your mouth. This lets the heart beating against your lungs be what pushes air in and out and then you hear the sounds of the air pulses as it moves past your eustachian tubes in your throat. Making sure your lungs are as full as possible is required so the lungs push against the heart.
I think enshittification is hitting everything, but it’s probably also that you are old. I find that I just can’t eat the same way that I could 20 years ago.