There are studies/research that documents tinnitus, related to other stuff.
Chronic sinus inflammation appears to alter brain activity: Study findings may help explain patients' complaints of poor concentration and other cognitive symptoms that accompany sinusitis. Study funding was provided by...
Try using slender pvc pipe for the frame bend them into an arc and secure them with zip ties. Built the base with 2x4s, place the PVC structure on it and pull with a rope to move to different places for the chickens to fertilize and peck...