Tell us what you think
You have taken many steps to improve noise control. To make sure those actions are still effective you need to:
Ensure that musicians and technicians understand why they need to follow instructions on control measures. Provide additional training if necessary. Regular meetings will help.
Review the trends of hearing health checks to see how well the noise controls are working
Plan for the expense of refurbishment and refitting studios
Ensure that those who need to use hearing protection are doing so correctly and consistently.
Review the steps you have taken (see What do you need to do?)