We cut, painted and screwed into post brackets a 4 x 4 header between posts to hang panel. Could also cut longer a stronger PVC pipe, or steel pipe using closet pole holders and screw into side posts....just a thought.
Bamboo is 8' and folded to make 4' privacy screen with bed sheet inside for additional privacy and secured with small zip ties. Cut bedsheet to size of folded bamboo to hang inside the privacy screen. Cut 2 PVC pipe's for top and folded bottom of bamboo screen, and secure with zip ties.
Used zip ties thru bamboo, under top PVC pipe, to hang on screw hooks screwed into header. Slide 2nd PVC pipe between bamboo at folded bottom and secure with zip tie attach to screw hooks on each post.
This privacy screen has been hanging for over two years and has endured rain and winds up to 40mph and still looks great!
Note: I use the bed sheet for additional privacy and noise reduction, but use your imagination for another possibility.