Quietness has become one of the key performance requirements for many users of vacuum pumps. In responcse, we launched the new air-cooled dry pump 'NeoDry-G' series in 2022. 'NeoDry-G' series is significantly quieter than its predecessor, the 'NeoDry-E' series. This paper provides a brief introduction to the NeoDry-G series, detailing how the quietness was improved and how it was evaluated.