容認発音
He was a pupil and colleague of Daniel Jones, and is known for having updated and extended Jones's description of standard British English pronunciation (Received Pronunciation, or RP). Through his "Introduction to the Pronunciation of English", first published in 1962, Gimson became an authority on Received Pronunciation. He succeeded Jones as editor of the "English Pronouncing Dictionary", making significant changes to its content and presentation. He was known to generations of students and colleagues simply as 'Gim'.