By Ning Xiang, Gerhard M. Sessler
This e-book explores the lifestyles and medical legacy of Manfred Schroeder via own reflections, medical essays and Schroeder’s personal memoirs. Reflecting the wide variety of Schroeder’s actions, the 1st a part of the e-book comprises 13 articles written via his colleagues and previous scholars. themes mentioned contain his early, pioneering contributions to the certainty of statistical room acoustics and to the dimension of reverberation time; his advent of electronic sign processing tools into acoustics; his use of ray tracing how to learn sound decay in rooms and his achievements in echo and suggestions suppression and in noise aid. different chapters disguise his seminal examine in speech processing together with using predictive coding to minimize audio bandwidth which resulted in quite a few code-excited linear prediction schemes, at the present time used greatly for speech coding. numerous chapters speak about Schroeder’s paintings in low-peak issue signs, quantity concept, and maximum-length sequences with key functions in listening to learn, diffraction gratings, synthetic reverberators and de-correlation strategies for reinforcing subjective envelopment in encompass sound. well-liked, the articles diversity from really medical to conversationally own. In all contributions, the connection among the present examine awarded and Manfred Schroeder’s personal fields of curiosity is, as a rule, obvious. the second one a part of the e-book comprises Schroeder’s personal memoirs, written over the ultimate decade of his lifestyles. those memories make clear many elements not just of Schroeder’s existence but in addition on that of a lot of his colleagues, pals and contemporaries. They painting political, social and medical occasions over a interval that extends from pre-war to the current. those memoirs, written in an inimitable and witty type, are filled with info, pleasing and enjoyable to learn, offering key perception into the existence and paintings of 1 of the best acousticians of the 20 th century.
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Additional info for Acoustics, Information, and Communication: Memorial Volume in Honor of Manfred R. Schroeder
52, 116–130 (1962) *** Biography Dr. Asbjørn Krokstad is a professor emeritus at the Norwegian University of Science and Technology, Trondheim, Norway, since 1998. D. from the Norwegian Institute of Technology, Trondheim, in 1962, and was professor from 1970. He did research on computational room acoustics, with the first paper on ray tracing in 1968, reverberation enhancement systems, and was behind the development of one of the world’s first digital hearing aid prototypes in 1989, and holds several patents related to this.
The Grieghallen project had got delayed quite severely after the design competition had been settled in 1965. Locally in Bergen, Helmer Dahl, research director at the Christian Michelsen Research Institute, had got involved in the plans to build the new concert hall, and had tried to use the old lightbeam method of Vern Knudsen for studying different room shapes. These attempts had failed and Dahl therefore had contacted Krokstad who had the ray-tracing program up and running. Svein Strøm describes that the small Trondheim group was hired as advisors for the Grieghallen project in Bergen .
In 1986, replacing thin rays (hitting a receiver sphere) by propagating cones (hitting a receiver point) . An important development was presented by Vorla¨nder in 1989 with the so-called hybrid technique: ray tracing was used to find possible reflection paths but in a subsequent phase, the ray-tracing-identified specular reflection paths were replaced by their image source equivalents. An advantage was that the image source method gives exact reflection paths, which can be used for improved accuracy in the early path of the impulse response .
Acoustics, Information, and Communication: Memorial Volume in Honor of Manfred R. Schroeder by Ning Xiang, Gerhard M. Sessler