OSHA does not approve hearing protectors or communication devices. Instead, look for a Noise Reduction Rating (NRR) label, which indicates the device has been tested and rated for noise reduction according to EPA requirements. Make sure the NRR is sufficient for your noise environment. We also recommend volume-limited communication devices to reduce risk of loud outputs at the ear.

OSHA explanation:

"... some manufacturers may claim that their products are "OSHA approved" or "100% OSHA compliant." OSHA does not register, certify, approve, or otherwise endorse commercial or private sector entities, products, or services. Therefore, any such claims by a manufacturer are misleading."

See: OSHA Letter of Interpretation, 2019