Noise

In this interview organized through the Acoustical Society of America, Per Brüel discusses his life and career, focusing especially on his introduction to the field of acoustical instrumentation and his work in industry. It also discusses his association with ASA and other national acoustical societies. Brüel recalls his upbringing in Jutland, education at what is now called the Technical University of Denmark, experiences during World War II, early R&D work in Sweden, and his relationship with figures such as P. O. Pedersen and Viggo Kjær. He also discusses his work on architectural acoustics and the origins and successes of such Brüel & Kjær products as the constant percentage analyzer, level recorder, and condenser microphone, as well as his criticisms of the A-weighting curve used in noise measurement. He reflects on Brüel & Kjær management issues, including his division of responsibilities with Kjær, how they made decisions jointly, relations with universities, advertising, and the strategic decisions leading up to the sale of the company in 1992. The interview concludes with discussions of Brüel’s interest in cars and flying, his family, and his activities following the sale of Brüel & Kjær.

Interview with Gilles Daigle. The interview begins with Daigle discussing his current work at MG Acoustics, a small consulting R&D firm. Then he recalls joining Acoustical Society of America (ASA) as a master’s student after being encouraged to join by his thesis supervisor, Tony Embleton. Daigle overviews the committees he has served on and positions he held within ASA over the years, culminating in his term as president from 2007-2008. Daigle then recounts his childhood in New Brunswick and how a chemistry project in high school inspired him to major in chemistry at the University of Moncton. However, he changed his major to physics and worked in a small nuclear physics lab. Daigle describes pursuing his master’s degree at Carleton University in Ottawa, initially studying nuclear physics but eventually switching to acoustics, where he studied atmospheric turbulence. He continued at Carleton for his doctorate and took a teaching position at University of Moncton, before accepting a position with National Research Council Canada, where he remained for 30 years. At the end of the interview, Daigle discusses the creation of MG Acoustics, the awards he has received from the ASA, his family life, and his avid interest in bird photography.