| Hans lives in a village situated at 1.5 km from a major road and rail road and an industrial plant. The nearest airport is at 5 km from his house. He can sometimes hear the road and rail noise and the flight approaches. His fields of expertise are environmental noise, machinery noise, building noise and measurement techniques. Hans is in contact with the Rail and Road Administration of Sweden, several working groups like ISO TC40/SCI/WG 45, CEN and several consultancy and software companies in Sweden.
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