Bowsher, John (Michael)
- Murray Campbell
(b London, August 26, 1933). English physicist and acoustician. He obtained a BSc in physics from Imperial College, London, later gaining the doctorate there with research into high-amplitude stress waves. After holding a research fellowship at the electronic music laboratory of the Canadian National Research Council in Ottawa, he worked for five years in the acoustics section of the UK National Physical Laboratory, where he carried out research on the psycho-acoustic perception of short duration and very low frequency sounds. In 1966 he was appointed to a lectureship in acoustics at the University of Surrey, where, in collaboration with colleagues in the US, Europe, Israel and Australia, he established a group which became noted for its research into the acoustics of wind instruments and their subjective assessment. He played a major part in the establishment there of the Tonmeister course in music and applied physics. An accomplished trombonist, his most notable research has been in the acoustics of brass instruments, where he supplemented and elucidated physical measurements by applying psychological testing procedures to the assessment of brass instrument tone quality. He developed a non-invasive technique which allows the bore of an instrument to be reconstructed by injecting acoustic pulses into one end and recording the reflections....