Joseph McGrail-Bateup has been officially recognized by Guinness World Records as the loudest person in the world [1].

The record establishes a new global benchmark for human vocal capacity, highlighting the extreme physiological limits of the human voice.

McGrail-Bateup, 58 [2], is a professional air-conditioner cleaner and an honorary town crier based in Canberra, Australia [1]. To achieve the record, he shouted the word “now,” which registered at 122.4 decibels [3]. Some reports rounded this figure to 122 decibels [4].

To provide context for the volume, such a level of noise is comparable to the sound of a chainsaw, a jet aircraft taking off, or an ambulance siren at close range [4]. The attempt was specifically designed to set a new Guinness World Record for the loudest human shout [1].

Despite the prestige of the title, McGrail-Bateup expressed a sporting attitude toward the achievement. "If someone beats me, that’s fantastic," he said [5].

The recognition comes as part of a series of vocal challenges documented in Canberra this month [2]. The measurement process required precise equipment to capture the peak decibel level of the single-word utterance [3].

“Joseph McGrail-Bateup has been officially recognized by Guinness World Records as the loudest person in the world”

This record underscores the intersection of professional skill and physical anomaly, as the town crier's role requires projecting voice over long distances. By quantifying the maximum output of a human shout, the record provides a data point for acoustic research and the limits of human respiratory and vocal cord strength.