本發明提供一種偵測拉普拉斯腦電波(LEEG)訊號的感測元件，其包括一訊號擷取模組，該訊號擷取模組設置在一對象的頭皮上，用以擷取腦部訊號。一訊號處理器與該訊號擷取模組耦合或連接，用以對該訊號擷取模組所擷取的訊號進行一拉普拉斯運算，如此便可降低雜訊訊號，用以產生一高訊號雜訊(S/N)比的類比LEEG訊號。 A sensor device for detecting Laplacian electroencephalogram (LEEG) signals includes a signal acquisition module placed on a scalp of a subject to acquire brain signals. A signal processor is coupled or connected to the signal acquisition module to perform a Laplacian operation on the signals acquired by the signal acquisition module such that the noise signal is reduced to yield an analog LEEG signal with a high signal－to－noise (S/N) ratio.
