The Americans with Disabilities Act (ADA) requires public facilities to provide equal access to people with disabilities, including those individuals who have difficulty hearing. Please see below for informational resources regarding ADA compliance.
Compliance
Williams Sound ADA Calculator App
from the U.S. Department of Justice ADA Home Page
from the U.S. Department of Justice ADA Home Page
from 2010 ADA Standards for Accessible Design
Williams Sound ADA Specifications
from the Office of the Attorney General (Washington, DC)
for State and Local Governments