부정 출결 방지를 위한 음파 신호 기반의 전자출결 시스템

초록

Attendance is an important indicator that can confirm students’ participation in lectures, and the traditional method of attendingby name has the disadvantage of taking a lot of time. To solve this problem, many universities have introduced an electronic attendancesystem to simplify the attendance authentication process, but the current authentication methods have a problem in that attendanceauthentication outside the classroom is possible due to information leakage or additional equipment needs to be installed to introducethe system. In this paper, we propose a sound wave signal-based attendance authentication system for the convenience of introducingthe system in the future to prevent unauthorized attendance. The proposed system was able to authenticate attendance within an averageof about 16 seconds for students up to 11 meters away from the speaker with an output of 55 dB in a 100m² classroom, and it wasconfirmed that signal leakage using sound transmission methods such as recording and call was impossible.

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