title: Ð§Ð°ÑÑÐ¾ÑÐ½Ð¾-Ð¸Ð·Ð±Ð¸ÑÐ°ÑÐµÐ»ÑÐ½Ð¾Ðµ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð¾ Ð´Ð»Ñ ÑÐ»ÐµÐºÑÑÐµÑÐ½Ð¾Ð³Ð¾ ÐºÐ¾Ð½Ð´ÐµÐ½ÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð¼Ð¸ÐºÑÐ¾ÑÐ¾Ð½Ð°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: The frequency-selective device for an electret condenser microphone
Creators: name: ÐÑÑÐ»Ð¸Ð½, ÐÑÑÑÐ¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÑÐ¸Ð»ÑÑÑ Ð¡Ð°Ð»Ð»ÐµÐ½Ð°-ÐÐ¸
ÑÐ»Ð»Ð¸Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ¸Ð»ÑÑÑ
Ð¸Ð¼Ð¸ÑÐ°ÑÐ¸Ñ Ð¸Ð½Ð´ÑÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸
Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÐµ Ð¸ÑÐºÐ°Ð¶ÐµÐ½Ð¸Ñ
ÑÑÐ¼Ð¾Ð²Ð°Ñ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ°
Sallen-Key filter
elliptical filter
inductance simulation
nonlinear distortion
noise characteristic

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description: The subject of the graduate qualification work is âlowâpass filterâ. This work is devoted to the development of a frequency-selective device for an electret condenser microphone. The assessment of the current state of the solved scientific and technical problem was given and the initial data were identified as a result of the research. The calculation and modeling of the 2nd-order Sallen-Key filter and the frequency-selective device with replacement of inductors by an active circuit based on operational amplifiers were carried out, and these filters were compared. As a result, it is recommended to use a frequency-selective device with the replacement of inductors with an active circuit based on operational amplifiers for an electret condenser microphone in an electronic stethoscope, since this frequency-selective device has less unevenness in the bandwidth and provides a greater dynamic range at the beginning and in the middle of the frequency range up to 1 kHz. With the same hardware costs as in the filters used for the electronic stethoscope in other works, the frequency-selective device proposed for use in this work provides better characteristics compared to other filters.