6th Annual Judith Ramaley Celebration of Research and Creative Scholarship
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Poster #97 Geophone Noise Reduction Birat Sapkota Faculty Mentor: Fredrick W Otto The geophone is a device with a magnet suspended along the axis of a coil that is used to study ground wave transmission. The performance in the field of a geophone is often degraded because there is a lot of noise from wind and other unwanted vibrations. In this study, vibrations are created in a large container of sand, and detected by a geophone and a set of accelerometers. Several methods are employed to reduce extraneous noise, including conventional electronic filtering, use of a lock-in amplifier and the use of a control geophone outside of the sand container to subtract out background noise from the environment. |
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