{"abstract":"The Federal Aviation Administration (FAA) proposes noise certification standards that would apply only to the Matternet model M2 quadcopter unmanned aircraft because there are currently no generally applicable noise certification standards for this aircraft.","action":"Notice of proposed rulemaking (NPRM), rule of particular applicability.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Aviation Administration","name":"Federal Aviation 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