And this has been a burden of the users speech intelligibility evaluation to assess the status of the hearing aid fitting is required answer input by the user. And biological signal measurement section for measuring an electroencephalogram signal of a user, and the audio output unit for presenting the voice, characters and an output unit for presenting the character, evaluation system speech intelligibility, speech database that holds a plurality of speech monosyllabic a presentation speech control unit for controlling so that the audio output unit and speech for determining a speech to be presented by reference to, the determination is presented in the order of voice, the character through the character output unit, it is measured by the biological signal measurement section from the EEG signal of the user was to determine speech intelligibility the speech intelligibility based on the determination result and determining disappointing detector, disappointing detector the presence or absence of a positive component in 600ms ± 100ms as a starting point the time at which the characters are presented I have a degree and evaluation unit.補聴器のフィッティング状況を評価するための語音明瞭度評価はユーザの回答入力が必要でありユーザの負担になっていた。語音明瞭度評価システムは、ユーザの脳波信号を計測する生体信号計測部と、音声を呈示する音声出力部と、文字を呈示する文字出力部と、単音節の語音を複数保持している語音データベースを参照して呈示する語音を決定し、決定した語音が、音声出力部および文字出力部を介して音声、文字の順に呈示されるよう制御する呈示語音制御部と、生体信号計測部で計測されたユーザの脳波信号から、文字が呈示された時刻を起点として600ms±100msにおける陽性成分の有無を判定する期待はずれ検出部と、期待はずれ検出部の判定結果に基づき語音明瞭度を判定する語音明瞭度評価部とを備えている。
