How long did your car run with the reduced oil pressure ?
Were you driving it... or sitting in your driveway checking for leaks ?
How did you figure out you had a problem? Oil spewing, saw the guage not going up, going down.. that sort of narrative of what happened.
How did you get the car to your mechanics shop ?
If you had normal rpms of driving... and you did not notice it quickly... like within seconds.... or your oil guage was not responding quickly...
then you very well may have a problem with the bearing on the rod at the crank throw...or the other end of the rod at the piston pin....
Structural problems like this are hard to diagnose by sound... as it travels through solids and liquids ( some cps ) better than air....