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Vol 163
Pages:
204-206
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RUS

Methodological specifics of calculation of electret transducers

Authors:
N. S. Pshchelko
About authors
  • G.V. Plekhanov Saint Petersburg Mining Institute
Date submitted:
2004-10-13
Date accepted:
2004-11-03
Date published:
2005-05-01

Abstract

Methodological problems of electret transducer calculation are discussed. It is shown that the electret transducer insert is too complicated object for modeling. Therefore, it is necessary to make some simplifying assumptions in the model. For example, the transducer membrane is assumed to have a dome-shape. Since the amplitude of membrane oscillations is small, the object under consideration is studied in the linear approximation. A method of calculating the sensitivity of the electret microphone depending on the frequency of oscillation, transducer geometry, voltage and charge of the electret, etc. is proposed. The deflection of the membrane under the action of electrostatic forces is taken into account. It is shown that this procedure leads to a relatively simple analytically feasible solution. Application of the procedure allows to develop nondestructive testing methods for electret microphones, to optimize the design of electret microphones, to use the design of electret transducer in the educational process, etc.

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References

  1. Ганенков Н.А. Электретные электромеханические преобразователи / Н.А.Ганенков, Н.С.Пщелко // Радиоэлектроника в СПбГЭТУ. СПб, 1996. Вып.2. С.121-126.
  2. Закржевский В.И. Методические указания к курсовым проектам по дисциплине «Расчет и конструирование полупроводниковых и диэлектрических структур» / В.И.Закржевский, О.И.Колдунов, Н.С.Пщелко; Электротехнический университет. СПб, 1992. 20 с.
  3. Модификация термостойких фотолаков для новых областей применения / Н.В.Климова, Г.К.Лебедева, Л.И.Рудая, Т.А.Юрре, И.М.Соколова, Н.С.Пщелко // Петербургский журнал электроники. СПб, 2002. № 3. С.33-37.
  4. Патент 2132116 РФ. Способ определения качества электретных электроакустических преобразователей и устройство для его реализации / Ф.И.Баталов, Н.С.Пщелко, А.С.Ястребов (РФ). 1999.
  5. Пщелко Н.С. Методика расчета электретных приемных электроакустических преобразователей / Н.С.Пщелко, В.Н.Таиров // Акустический журнал. М., 1988. Т.34. № 4. С.706-710.
  6. Пщелко Н.С. Оптимизация параметров электретных микрофонов / Н.С.Пщелко, Д.А.Козодаев // Известия Электротехнического университета. СПб, 1997. Вып.504. С.87-92.
  7. Теория и расчет электромеханических преобразователей на активных диэлектриках: Учеб. пособие / Н.А.Ганенков, В.И.Закржевский, О.И.Колдунов, Н.С.Пщелко; Электротехнический университет. СПб, 1994. 43 с.
  8. Kozodaev D.A. Analysis of Electert Sub-Miniature Microphones / D.A.Kozodaev, N.S.Pshchelko, V.I.Zakrzhevskiy // Proc. ISE-10. Athens, 1999. P.973-978.
  9. Pshchelko N.S. Sensitivity Stability of Electret Transducers / N.S.Pshchelko, V.N.Tairov, A.R.Ozols // Proc.ISE-7. Berlin, 1991. P.935-940.
  10. Pshchelko N.S. C-V – Testing of Electeret Transducers / N.S.Pshchelko, I.M.Sokolova, V.I.Zakrzhevskiy // Proc. ISE-8. Paris, 1994. P.1028-1033.

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