An Introduction to the Theory and Design of Sonar Transducers by Oscar Bryan Wilson

Abstract

There is no question that this monograph provides much excellent critical analysis of data dealing with many facets of the effects of noise, and can therefore serve as an introduction and bibliographic source reference for any contemplated more thorough study of such facets. However, the coverage is far from complete: Besides the exclusion of literature in foreign languages, and of most animal studies, topics mentioned only briefly, if at all, include auditory effects other than loss of pure-tone sensitivity (e.g., changes in differential thresholds, tinnitus, etc.), the physiological substrate of even pure-tone loss, individual differences in susceptibility to damage, and the whole field of hearing protectors. In addition, the level of critical insight is not uniform, nor is the accuracy of the presentation: All too often experimental parameters are misstated, graphs and equations are reproduced without enough accompanying information to permit them to be understood, or experiments are misinterpreted. Indeed, some studies are ignored whose results challenge the validity of assumptions that Kryter makes in order to support his idiosyncratic recommendations for noise regulations. So although this book will be an indispensible asset to any future investigator concerned with one of the effects of noise on man, it is only a starting point, not a final authority: It will still be necessary to study original sources in order to achieve a balanced view of the state of knowledge about the noise effect under consideration.

Incidence Angle Estimation by the Tonpilz Type Underwater Acoustic Vector Sensor with a Quadrupole Structure

“…[1] 일반적으로 음원의 방향을 파악하기 위해서는 다수의 스칼라 트랜스듀서를 사용한 배열형 센서를 이용하는데, Schau [2] 와 Rendas [3] 등이 제안한 두 개 이 상의 하이드로폰을 이용하여 배열센서에 도달하는 음향 신호의 시간 지연차를 이용해 음원의 방위각 (azimuth), 고각(altitude), 거리를 추정하는 방법 또는 Baggeroer [4] 와 Zou [5] …”

A sound projector for acoustic tomography and global ocean monitoring

“…A simplified model of the resonator tube-tunable projector is based on the similarity of mechanical differential equations and equations for ordinary electrical elements such as capacitors, inductors, resistors, and transformers [11]. The model is simpler than FE analysis and does not need special software or powerful computers to facilitate the prediction of precise projector parameters.…”

Modeling and Simulation of Piezoelectric Devices

“…At a relatively low incident power the BAW resonator has a linear behaviour which can be described in a broad frequency range by the Mason model (Wilson, 1989), a circuit which contains lumped and distributed parameter elements. In the vicinity of a resonance frequency pair (as, for example corresponding to the thickness mode) a simpler model, the Butterworth-Van Dyke (BVD) circuit, can be used (Fig.…”