First determine what/where the noise is coming from.
Does it sound like a water fall? - The water level in your overflow box may be too low
Toilet Flushing? - Drain line is coming under full siphon and sucking all the water it can.a
Continuous water flowing?
Two things I can think of. First is very slowly raise or lower the airline tubing a fraction of an inch at a time until you find its sweet spot, the flushing should stop when it is immersed correctly and it should get quieter. Second is the photos are not very clear but it looks like your water is dropping over the overflow too far meaning the standpipe should be taller.
That's the video I used to make my stand pipe lol and I was thinking of just putting a coupling on the bottom then adding a short pice of PVC to the other end but the telascoping coupling is a good idea
ok so I fixed the stand pipe and it is now dead quiet all I did was add a one inch coupling to the bottom then cut a 2 inch section of pipe and put 1 inch in the coupling then the rest in the bulk head and it raised it up an inch or so and the water no longer flows over the baffle in the box and is above it and it made it dead quiet thank you for all the advice