巻号一覧
38 巻, 7 号
選択された号の論文の9件中1～9を表示しています
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太田 光雄, 岩重 博文原稿種別: 本文
1982 年 38 巻 7 号 p. 395-405
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーA new universal probability expression with discrete levels is theoretically found as the basis of the probabilistic evaluation for sound transmission. This expression can be derived in the several expansion forms with mathematical difference operations, and so, is suitable to treat directly the actually observed digital data in the numerical form. As its application, a new method of the probability evaluation is proposed for double-wall and single-wall, sound insulating systems. In this case, the probability distribution function of the output fluctuation can be predicted with the evaluation of energy transmission coefficients by use of the improved S. E. A. (Statistical Energy Analysis) method for each sound insulating system. Our new probabilistic estimation of the output fluctuation will be affected by the statistical character of the input, and the proper sound transmission characteristic {a_i} of the system. This general probability expression is given in a statistical expansion form taking the well-known binomial distribution as the first term. Agreement between theory and experimentation is effectively confirmed for these cases.抄録全体を表示PDF形式でダウンロード (941K) -
上野 孝文, 石井 伸一郎原稿種別: 本文
1982 年 38 巻 7 号 p. 406-413
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーA new approach to the design of loudspeaker crossover network is presented whereby the component values of the network are selected by a digital computer such that the value of a functional is minimized. The functional represents the error between the desired and actual frequency response of the system. The crossover networks are normally designed using a mixture of simple analytical filter theory and trial and error. To overcome the limitation of the trial and error technique, we have developed a new design system of loudspeaker network using a nonlinear optimization method. The features are as follows : 1) Fletcher-Powell's method was chosen by the authors. 2) The suer can input an arbitrary desired frequency response from the data tablet. 3) The component values of the network can be obtained in the standard series. An example of three-way network of 12 dB/oct. filters is shown. Aster 20 iterations, The deviation of the frequency response is decreased from 10 dB to 3 dB. The CPU time required for minimization is about 2 min. The time for loudspeaker network design is reduced to 1/10 of the conventional design.抄録全体を表示PDF形式でダウンロード (741K) -
元石 浩二, 大野 克郎原稿種別: 本文
1982 年 38 巻 7 号 p. 414-420
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーThe dynamical behaviour of a nonlinear electrical circuit model of a hair cell is studied and shown to agree with recent physiological data. The feature of this model is that is has a nonlinear resistance corresponding to the potassium channels in the membrane of the squid giant axon. The behaviour of this model in response to mechanical and electrical stimuli agrees well with Hudspeth and Corey's data for the mechano-electrical transduction properties of the hair cell. Another analysis on the behavior of the model in response to injection of current steps shows that the model can qualitatively account for the ringing phenomenon observed by Crawford and Fettiplace.抄録全体を表示PDF形式でダウンロード (805K) -
守田 栄原稿種別: 本文
1982 年 38 巻 7 号 p. 421-
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (147K) -
滝瀬 忠原稿種別: 本文
1982 年 38 巻 7 号 p. 422-428
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (1165K) -
高橋 幸夫, 大橋 心耳原稿種別: 本文
1982 年 38 巻 7 号 p. 429-435
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (791K) -
王 炳麟原稿種別: 本文
1982 年 38 巻 7 号 p. 436-441
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (1347K) -
原稿種別: 付録等
1982 年 38 巻 7 号 p. 442-
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (127K) -
原稿種別: 付録等
1982 年 38 巻 7 号 p. 442-
発行日: 1982/07/01
公開日: 2017/06/02
ジャーナル フリーPDF形式でダウンロード (127K)
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