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In this paper, the structure and working principle of the geophone are analyzed and its dynamics are modeled. After synthesizing the negative resistance method and zero-pole compensation, two commonly adopted low-frequency extension methods, a method for improving low-frequency response, which is a series filter and a subtraction circuit to increase the damping ratio, is proposed. Applying this method to improve the low-frequency response of the JF-20DX geophone, which has a natural frequency of 10 Hz, results in a flat response to acceleration in the frequency range from 1 to 100 Hz. Both the PSpice simulation and actual measurement show a much lower noise level via the new method. Testing the vibration at 10 Hz, the new method has a 17.52 dB higher signal-to-noise ratio than the traditional zero-pole method. Both theoretical analysis and actual measurement results show that this method has a simple circuit structure, introduces less circuit noise, and has a low-frequency response improvement effect, which provides an approach for the low-frequency extension of moving coil geophones.<\/jats:p>","DOI":"10.3390\/s23063082","type":"journal-article","created":{"date-parts":[[2023,3,14]],"date-time":"2023-03-14T03:04:46Z","timestamp":1678763086000},"page":"3082","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["An Effective Method for Improving Low-Frequency Response of Geophone"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8826-4681","authenticated-orcid":false,"given":"Kai","family":"Ma","sequence":"first","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2879-030X","authenticated-orcid":false,"given":"Jie","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4404-7383","authenticated-orcid":false,"given":"Yubo","family":"Ma","sequence":"additional","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]},{"given":"Boyi","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]},{"given":"Shengyu","family":"Qi","sequence":"additional","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4378-1161","authenticated-orcid":false,"given":"Xiaochang","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China"},{"name":"State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,13]]},"reference":[{"key":"ref_1","unstructured":"Amirikas, R., Ehrlichmann, H., Bialowons, W., and Bertolini, A. 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