UNCOMFORTABLE LOUDNESS LEVEL EVALUATION SYSTEM, UNCOMFORTABLE LOUDNESS LEVEL EVALUATION DEVICE, UNCOMFORTABLE LOUDNESS LEVEL ADJUSTMENT DEVICE, UNCOMFORTABLE LOUDNESS LEVEL EVALUATION METHOD, AND COMPUTER PROGRAM THEREFOR

Title:

Document Type and Number:

WIPO Patent Application WO/2014/049979

Kind Code:

A1

Abstract:

The present invention corrects estimation results of uncomfortable loudness level estimation that is based on brain waves, and implements safer hearing aid adjustment. An uncomfortable loudness level evaluation system sequentially presents each of a plurality of sound stimuli groups to a user. The sound stimuli groups include at least one sound stimulus, and the frequencies of the sound stimuli groups are different from each other. The system is provided with: an extraction unit for extracting, for each sound stimulus group, information related to an event-related electric potential from a brain wave signal of a user in a predetermined interval in which the presentation time of at least one sound stimulus is established as a starting point; an estimation unit for estimating the uncomfortable loudness level for the user from the information related to the event-related electric potential with reference to a preset standard; and a correction unit for assessing whether the estimated uncomfortable loudness level is higher than a preset maximum uncomfortable loudness level or equal to or less than the maximum uncomfortable loudness level, and correcting each of the uncomfortable loudness levels assessed to be higher than a maximum sound pressure to a sound pressure equal to or less than the maximum uncomfortable loudness level when the ratio of uncomfortable loudness levels assessed to be higher than the maximum uncomfortable loudness level among the determination results for all of the sound stimuli groups is less than a predetermined ratio.

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Inventors:

ADACHI SHINOBU
OZAWA JUN

Application Number:

PCT/JP2013/005263

Publication Date:

April 03, 2014

Filing Date:

September 05, 2013

Export Citation:

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Assignee:

PANASONIC CORP (JP)

International Classes:

A61B5/0484; A61B5/12; H04R25/00

Domestic Patent References:

WO2008038650A1	2008-04-03
WO2001087147A2	2001-11-22

Foreign References:

JP2009288354A	2009-12-10
JP2004179965A	2004-06-24

Attorney, Agent or Firm:

OKUDA, SEIJI (JP)
Seiji Okuda (JP)

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