Ian Maddieson is a linguist who was at University of California, and is now an adjunct professor emeritus at the University of New Mexico.
He was Vice-President of the International Phonetic Association and Secretary of the Association for Laboratory Phonology.
Ladefoged, Peter; Maddieson, Ian (1996). The Sounds of the World's Languages. Oxford: Blackwell. ISBN 0-631-19814-8.
Based on data from about 400 languages, the book describes the known contrasting phonetic categories, the ways in which the phonemic sounds may differ in human languages.
Maddieson, Ian, Patterns of Sounds,
Cambridge University Press, 1984, ISBN 0-521-26536-3
Cambridge University Press, 2009, ISBN 0-521-11326-1
The book analyzes the frequencies and distributions of the phonemic sounds among languages. The results are based on UPSID (the UCLA Phonological Segment Inventory Database).
