SHAPE ESTIMATION METHOD AND DEVICE OF AUDITORY FILTER,申请号JP20020012386-传众专利搜索

SHAPE ESTIMATION METHOD AND DEVICE OF AUDITORY FILTER

申请公布号：JP2003210436(A)

申请号：JP20020012386

申请日期：2002.01.22

申请公布日期：2003.07.29

申请人：

RION CO LTD

发明人：SAKAMOTO SHINICHI;NAKAICHI KENJI

分类号：A61B5/12;H04R25/00;(IPC1-7):A61B5/12

主分类号：A61B5/12

摘要：PROBLEM TO BE SOLVED: To estimate the shape of an auditory filter in a short period of time. SOLUTION: This method estimates the shape of the auditory filter by finding a coefficient p of roex (p, r) filter formed by modeling the shape of the auditory filter. This method determines a limit masking level NX based on a signal sound S formed by adding an appropriate value x to the minimum audio threshold T of a subject in a frequency f, generates a signal sound S' formed by subtracting an appropriate value a from the signal sound S, and generates a masker M with notch width of g and the level of NX including the frequency f in the notch. Then, this method presents an examination sound formed by superposing the masker M to the signal sound S', measures the minimum notch width gX<SB>-a</SB>of the subject while changing the notch width g, estimates the upper limit value g<SB>max</SB>of the notch width g suited to the subject from the minimum notch width gX<SB>-a</SB>, calculates the coefficient p from the upper limit value g<SB>max</SB>, the minimum notch width gX<SB>-a</SB>, and the value x and the value a equivalent to a coefficient r, and estimates the shape of the auditory filter by the calculated coefficient p and the value x equivalent to the coefficient r. COPYRIGHT: (C)2003,JPO