In meeting your duties to protect workers from excessive noise exposure you are likely to come across hearing impaired persons or hearing aid users who this may have a more adverse impact on.  What are the issues you need to consider for this particular group of workers to keep them safe, continue to protect their hearing and avoid exclusion or isolation issues.  This guidance was drafted by experts from the HSE over a number of years and will help employers to think about the key issues and answer some of the questions you will have.