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by aidenn0 1032 days ago
The California carve-out for hearing protection states: "The plugs or molds shall be designed in a manner so as to not inhibit the wearer's ability to hear a siren or horn from an emergency vehicle or a horn from another motor vehicle."

Ohio has a carve out specifically for motorcycles; operators of vehicles cannot (I used to own an RV where the wind and road noise at freeway speeds was well above safe levels for sustained operation).