By Ning Xiang, Gerhard M. Sessler
This publication explores the lifestyles and clinical legacy of Manfred Schroeder via own reflections, clinical essays and Schroeder’s personal memoirs. Reflecting the big variety of Schroeder’s actions, the 1st a part of the e-book includes 13 articles written by means of his colleagues and previous scholars. themes mentioned comprise his early, pioneering contributions to the knowledge of statistical room acoustics and to the dimension of reverberation time; his creation of electronic sign processing tools into acoustics; his use of ray tracing easy methods to research sound decay in rooms and his achievements in echo and suggestions suppression and in noise relief. different chapters disguise his seminal examine in speech processing together with using predictive coding to lessen audio bandwidth which resulted in a variety of code-excited linear prediction schemes, this day used widely for speech coding. numerous chapters speak about Schroeder’s paintings in low-peak issue signs, quantity conception, and maximum-length sequences with key purposes in listening to study, diffraction gratings, synthetic reverberators and de-correlation ideas for reinforcing subjective envelopment in encompass sound. common, the articles variety from actually medical to conversationally own. In all contributions, the connection among the present study awarded and Manfred Schroeder’s personal fields of curiosity is, quite often, obtrusive. the second one a part of the ebook comprises Schroeder’s personal memoirs, written over the ultimate decade of his lifestyles. those memories make clear many elements not just of Schroeder’s lifestyles but additionally on that of a lot of his colleagues, pals and contemporaries. They painting political, social and clinical occasions over a interval that extends from pre-war to the current. those memoirs, written in an inimitable and witty type, are packed with info, enjoyable and enjoyable to learn, offering key perception into the lifestyles and paintings of 1 of the best acousticians of the twentieth century.
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Additional info for Acoustics, Information, and Communication: Memorial Volume in Honor of Manfred R. Schroeder
3 N. Xiang Linear and Nonlinear Regression The characteristic features of Schroeder decay curves summarized above, along with the model in Eq. 3), help us understand the fact that the linear least-squaresfit approach to directly fit logarithmic Schroeder decay functions (curves) relies on an inappropriate model. A large number of investigations have been reported in major acoustics journals for decades after Schroeder published this method. The reported effort, among others, includes mitigation of the nonlinear decay curves [as shown in Fig.
Calculating the acoustical room response by the use of a ray tracing technique. J. Sound Vib. 8, 118–125 (1968) 3. : Digital computers in room acoustics. In Proceedings of the 4th International Congress on Acoustics, Copenhagen (1962) 4. : Digital simulation of sound transmission in reverberant spaces. J. Acoust. Soc. Am. 47, 424–431 (1970) 5. CATT Acoustic. se 6. Odeon. dk 7. : The history of linear prediction. IEEE Signal Processing Magazine, Match 2006, pp. 154–161 (2006) 8. : Architectural Acoustics, pp.
On the other hand, the medium is refractive so that the rays do not travel along straight lines. In underwater acoustics, early work was apparently done using ray tracing in the US Navy. The abstract in a 1956 report by Anderson and Peterson claims that “This report discusses: (1) an acoustic intensity program for estimating convergence zone propagation loss using ray theory” . More publically, in an abstract from an ASA Meeting in November 1961, Norris claimed that “A ray-tracing program which has been developed for the IBM 704 and 7090 computers yields results which show excellent agreement with experimental data.
Acoustics, Information, and Communication: Memorial Volume in Honor of Manfred R. Schroeder by Ning Xiang, Gerhard M. Sessler