Something that many never would have considered to include under the ADA is classroom acoustics. It is certainly something that is on the agenda of the US Access Board. According to the AccessBoard, children are capable of hearing things adults can't (which isn't surprising to learn), so reverberations and other background noises can affect a child's learning. Poor acoustics in classrooms present another barrier for children with hearing loss. Nobody wants something that can easily be corrected to interfere with a child's education!