Garden wall additional support

[fletcher7751]

Hi

I am considering building a half brick wall at the bottom of my garden instead of replacing a rotted fence cos l have a new neighbour with an acute intolerance of any noise......
I'd like it to be 2M tall, the max without PP, but am concerned about making it as wind resistant as poss.
It will be bonded in to an existing 7N concrete block workshop at one end, be around four metres long and at the other end will be bonded in with a three brick square ppanter. It will be on top of an excising brick wall eight courses high, and all the existing is built on 350 x 300 concrete foundations

I understand that the engineers here will be scratching their heads saying not again", but....
I propose sinking two 2.4M tall concrete posts at 1.3M centres located at the rear of the wall, and there will be a timber wall plate on top with 1560 x 50 pergola rafters at 90 degrees sitting a beam spanning posts to tie it all in.

If you can follow that is there an SE in here who would say that is reasonable, or shoot it down blinding me with science?

I'll be very grateful for replies, and thanks

 

[fletcher7751]

PS The planter to the left is 600 high, 900 x 900 in plan
Considering 2 wind posts at the rear of the 4m run, and centre on them one brick attached piers