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
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