The book “Mechanical Vibration and Shock Measurements” has long been a mainstay in Brüel & Kjær’s series of books on the fundamentals of physical measurement and analysis. Although the basic theory is still valid, a great many developments have occurred since the book was last revised by Professor Jens Trampe Broch in May 1972, and it w as decided in 1979 to bring the book fully up-to-date, partly by a revision of existing material, and partly by adding new chapters where relevant. It was decided to keep as closely as possible to Professor Trampe Broch’s original text, and he has had the opportunity to approve the modifications.