The present invention provides a mastication frequency identification and display device that accurately counts and displays the number of mastications even if noise is mixed in mastication detection data. An electric signal obtained by detecting a change in the shape of the ear canal by a sensor is sampled by an AD conversion circuit and converted into mastication detection data, and the mastication detection data is stored in a memory 4a of a memory reading means 4. The autocorrelation calculating means 5 calculates the normalized autocorrelation value R (t) by calculating the mastication detection data read from the memory 4a of the memory reading means 4. Only when the peak of the autocorrelation value R (t) is included in the assumed chewing interval, the discrimination counting means 6 discriminates and counts the number of chewing times and outputs an identification count value. The display means 7 displays the identification count value. [Selection] Figure 1【課題】咀嚼検出データにノイズが混入しても精度よく咀嚼回数を計数して表示する咀嚼回数識別計数表示装置を提供する。【解決手段】耳孔の形状変化をセンサー１で検出した電気信号をＡＤ変換回路３でサンプリングして咀嚼検出データに変換し、この咀嚼検出データを記憶読出手段４のメモリ４ａに記憶する。自己相関演算手段５は、記憶読出手段４のメモリ４ａから読み出した咀嚼検出データを演算処理して正規化自己相関値Ｒ（ｔ）を求める。識別計数手段６は、自己相関値Ｒ（ｔ）のピークが咀嚼想定間隔に含まれる場合のみ、咀嚼回数を識別計数して、識別計数値を出力する。表示手段７は、識別計数値を表示する。【選択図】図１
