PROBLEM TO BE SOLVED: To solve the problem that it takes time for measuring a loudness increase curve.SOLUTION: A method for measuring loudness presents a plurality of initial presentation sounds having a different frequencies with each other and sound pressure with a same loudness value, measures brain waves of a user when the initial presentation sound is presented, selects a similar typical pattern while expanding the typical pattern of brain waves including an event-related potential stored in a typical pattern storage part to compare the typical pattern with the event-related potential of the measured brain waves, presents a plurality of presentation sounds having a different frequencies with each other and different sound pressure, measures the brain waves of the user when the presentation sounds are presented, and acquires an N1 component included in the typical pattern of the brain waves expanded so as to be most similar to the event-related potential relative to the plurality of presentation sounds while expanding the selected typical pattern, and obtains the loudness increase curve referring to the relation between latency of a predetermined N1 component and loudness and using the latency of the obtained N1 component.COPYRIGHT: (C)2013,JPO&INPIT【課題】ラウドネス増加曲線を計測するために、長時間かかっていた。【解決手段】ラウドネス計測方法は、互いに異なる周波数であり、ラウドネスが同じ値となる音圧を有する複数の初期呈示音を呈示し、初期呈示音を呈示した時のユーザの脳波を計測し、典型パタン記憶部に記憶している事象関連電位を含む脳波の典型パタンを伸縮させて、典型パタンと計測した脳波の事象関連電位とを比較し、類似する典型パタンを選択し、互い異なる周波数であり、異なる音圧を有する複数の呈示音を呈示し、呈示音を呈示した時のユーザの脳波を計測し、選択した典型パタンを伸縮し、かつ、脳波のうち複数の呈示音に対する事象関連電位と最も類似するように伸縮した典型パタンに含まれるN1成分を取得し、予め定めたN1成分の潜時とラウドネスとの関係を参照して、取得したN1成分の潜時を用いて、ラウドネス増加曲線を求める。【選択図】 図1
