SOUND PRESSURE ASSESSMENT SYSTEM, AND METHOD AND PROGRAM THEREOF
First Claim
1. A sound pressure assessment system comprising:
- a biological signal measurement section configured to measure an electroencephalogram signal of a user;
a sound database retaining data of a plurality of sounds, each sound being a pure tone;
a presentation sound determination section configured to determine a sound to be presented by referring to the sound database;
an output section configured to present the sound determined by the presentation sound determination section as a first sound to the user, and in a predetermined time after presenting the first sound, configured to present as a second sound a sound at least having a same frequency and a same sound pressure level as those of the first sound to the user;
an amount-of-change extraction section configured to extract an amount of change from an N1 component in response to the first sound to an N1 component in response to the second sound, the N1 component in response to the first sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the first sound as a starting point, the N1 component in response to the second sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the second sound as a starting point; and
an annoyance determination section configured to determine whether the sound pressure level of the presented sound is excessive to the user, based on the amount of change extracted by the amount-of-change extraction section.
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Accused Products
Abstract
A sound pressure assessment system determines sounds to be presented by referring to a database retaining data of sounds, each of which is a pure tone. The system presents the determined sound as a first sound, and in a predetermined time after presenting the first sound, presents as a second sound a sound at least having the same frequency and the same sound pressure level as those of the'"'"'first sound to the user. The system extracts an amount of change from an N1 component in response to the first sound to that in response to the second sound. The N1 components are negative components of an user'"'"'s event-related potential based on points of presenting the first and second sounds as respective starting points. The system determines whether the sound pressure level of the presented sound is excessive to the user, based on the amount of change.
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Citations
20 Claims
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1. A sound pressure assessment system comprising:
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a biological signal measurement section configured to measure an electroencephalogram signal of a user; a sound database retaining data of a plurality of sounds, each sound being a pure tone; a presentation sound determination section configured to determine a sound to be presented by referring to the sound database; an output section configured to present the sound determined by the presentation sound determination section as a first sound to the user, and in a predetermined time after presenting the first sound, configured to present as a second sound a sound at least having a same frequency and a same sound pressure level as those of the first sound to the user; an amount-of-change extraction section configured to extract an amount of change from an N1 component in response to the first sound to an N1 component in response to the second sound, the N1 component in response to the first sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the first sound as a starting point, the N1 component in response to the second sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the second sound as a starting point; and an annoyance determination section configured to determine whether the sound pressure level of the presented sound is excessive to the user, based on the amount of change extracted by the amount-of-change extraction section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sound pressure assessment apparatus comprising:
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a presentation sound determination section configured to determine a sound to be presented by referring to a sound database retaining data of a plurality of sounds, each sound being a pure tone; an output section configured to present the sound determined by the presentation sound determination section as a first sound to the user, and in a predetermined time after presenting the first sound, configured to present as a second sound a sound at least having a same frequency and a same sound pressure level as those of the first sound to the user; an amount-of-change extraction section configured to extract an amount of change from an N1 component in response to the first sound to an N1 component in response to the second sound, the N1 component in response to the first sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the first sound as a starting point, the N1 component in response to the second sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the second sound as a starting point; and an annoyance determination section configured to determine annoyance with respect to the sound pressure level of the presented sound, based on the amount of change extracted by the amount-of-change extraction section.
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16. A sound pressure assessment system comprising:
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a biological signal measurement section configured to measure an electroencephalogram signal of a user; a sound database retaining data of a plurality of sounds, each sound being a pure tone; a presentation sound determination section configured to determine a sound to be presented by referring to the sound database; an output section configured to present the sound determined by the presentation sound determination section as a first sound to the user, and in a predetermined time after presenting the first sound, configured to present as a second sound a sound at least having a same frequency and a same sound pressure level as those of the first sound to the user; an amount-of-change extraction section configured to extract an amount of change from an event-related potential in a zone from −
100 milliseconds to 400 milliseconds based on a point of presenting the first sound as a starting point, to an event-related potential in a zone from −
100 milliseconds to 400 milliseconds based on a point of presenting the second sound as a starting point; andan annoyance determination section configured to determine whether the sound pressure level of the presented sound is excessive to the user, based on the amount of change extracted by the amount-of-change extraction section.
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17. A sound pressure assessment method comprising the steps of:
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measuring an electroencephalogram signal of a user; determining a sound to be presented to the user; presenting the determined sound to as a first sound to the user, and in a predetermined time after presenting the first sound, presenting as a second sound the same sound as the first sound to the user; extracting an amount of change from an N1 component in response to the first sound to an N1 component in response to the second sound, the N1 component in response to the first sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the first sound as a starting point, the N1 component in response to the second sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the second sound as a starting point; and determining annoyance with respect to the sound pressure level of the presented sound, based on the extracted amount of change. - View Dependent Claims (18)
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19. A computer program stored on a non-transitory computer-readable medium, to be executed by a computer,
wherein the computer program causes the computer to execute the steps of: -
receiving an electroencephalogram signal of a user; determining a sound to be presented to the user; presenting the determined sound to as a first sound to the user, and in a predetermined time after presenting the first sound, presenting as a second sound the same sound as the first sound to the user; extracting an amount of change from an N1 component in response to the first sound to an N1 component in response to the second sound, the N1 component in response to the first sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the first sound as a starting point, the N1 component in response to the second sound being a negative component of an event-related potential of the electroencephalogram signal based on a point of presenting the second sound as a starting point; and determining annoyance with respect to the sound pressure level of the presented sound, based on the extracted amount of change. - View Dependent Claims (20)
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Specification