Guinness World Records recognizes Joseph McGrail-Bateup, an Australian professional air conditioner cleaner and honorary town crier from Canberra, as the world’s loudest person. Multiple outlets report that his Guinness record is based on a measured loudness of 122.4 decibels. The coverage describes him as both an air conditioner cleaner by profession and a town crier in an honorary role, highlighting the unusual combination of trades and community performing. The reports all attribute the announcement to Guinness World Records and note that the recognition is for the loudest person category. The consistency across sources indicates that the key details—his identity, his Canberra affiliation, his occupations, and the specific decibel reading—are the same in the record-setting report. The articles do not provide additional context about the testing method beyond the reported measurement, but they agree on the headline figure and the nature of the Guinness recognition.