JP6382789B2 - Perceptual sensitivity evaluation apparatus, method and program - Google Patents

Description

  The present invention relates to a technique for evaluating perceptual sensitivity by an objective test. How much a certain stimulus interferes with performing a predetermined action when performing a predetermined action, and its effect (hereinafter also referred to as “disturbing effect of a stimulus with respect to a predetermined action” or simply “disturbing effect”) The present invention relates to a technique for evaluating perceptual sensitivity by using the.

  Conventionally, an audiometer is known as a method for measuring a minimum audible value. The subject responds with a button that the sound can be heard or cannot be heard, and determines the audibility based on the button (subjective hearing test). For subjects with hearing loss (functional hearing loss) due to some psychological factor, it was difficult to correctly evaluate hearing ability. Therefore, there is a need for an objective test that is performed by capturing the physiological response of the subject without depending on the response of the subject. Non-patent documents 1 to 3 are known as techniques for evaluating auditory sensitivity by objective tests. Note that Non-Patent Document 4 shows that sound stimulation affects the rhythm of the finger, and Non-Patent Documents 1 to 3 utilize this effect.

In Non-Patent Documents 1 to 3, the subject is instructed to perform an exercise of rhythming with a finger in accordance with the blinking rhythm of light. First, a sound is presented to the subject in accordance with the blinking rhythm of light. After that, the timing of presenting the sound is shifted with respect to the blinking rhythm of light (hereinafter, this shift is also referred to as “anti-light sound delay ΔT _va ”) and presented to the subject. If the sound is heard, the finger timing is unconsciously shifted when the sound timing is shifted (hereinafter, this shift is also referred to as “optical tap delay ΔT _vm ”). Judge whether or not sound is heard based on _vm .

S. Furukawa, K. Onikura, S. Kidani, H. Liao, M. Kato, N. Kitagawa, "An objective measure of auditory detection threshold based on a light-synchronized tapping task", 38th ARO Midwinter Meeting (Baltimore, MD ), 2015. Furukawa Shigeto, Oniso Kazuteru, Kitani Shunsuke, Kato Masaharu, Kitagawa Satoshi, "Objective Audible Threshold Estimation by Optical Synchronous Tapping Task", Proceedings of the Acoustical Society of Japan Spring Conference, 2015. “Fingerless hearing test using finger movements”, NTT Communication Science Laboratories, Open House 2015, Explanatory Materials, June 2015 Repp, Bruno H., "Sensorimotor synchronization: a review of the tapping literature", Psychonomic bulletin & review 12.6 (2005): p.969-992.

However, in Non-Patent Documents 1 to 3, since the sound effect represents the light tap delay as a function of the light sound delay, it is necessary to test a plurality of light sound delay values, and the number of inspections increases. There is a problem. Further, the task of the subject is to tap according to the light, and the inspection result is also evaluated by the optical tap delay ΔT _vm . For this reason, presentation of a light stimulus is indispensable for a test | inspection, and there exists a problem that the test | inspection by the apparatus which cannot show a light stimulus, and a visually impaired person cannot be performed.

  It is an object of the present invention to provide a perceptual evaluation technique that does not depend on the answer of a subject, does not require a value of light delay, and does not necessarily require the presentation of a light stimulus.

  In order to solve the above-described problem, according to one aspect of the present invention, the perceptual sensitivity evaluation apparatus is a time series of exercise information of a subject who intends to perform a predetermined action in accordance with a first rhythm that is a constant rhythm. And the input information acquisition unit for acquiring the sound stimulus is presented to the subject performing a predetermined operation in accordance with the first rhythm with a second rhythm that is different from the first rhythm, The disturbance effect is measured based on the interval of the time when the subject performs a predetermined action before and after the sound stimulation is presented in two rhythms, and the sound stimulation is perceived when the disturbance effect occurs. And a disturbing effect measuring unit for judging.

  In order to solve the above-described problem, according to another aspect of the present invention, the perceptual sensitivity evaluation apparatus is configured to perform exercise information of a subject who is to perform a predetermined action in accordance with a first rhythm that is a constant rhythm. An input information acquisition unit for acquiring a sequence, and a first stimulus is presented with a second rhythm that is a rhythm different from the first rhythm to a subject performing a predetermined action in accordance with the first rhythm The disturbance effect is measured based on the time interval at which the subject performed a predetermined action before and after the first stimulus is presented in the second rhythm. And a disturbing effect measuring unit that determines that a stimulus is perceived.

  In order to solve the above-described problem, according to another aspect of the present invention, in the perceptual sensitivity evaluation method, an input information acquisition unit performs a predetermined operation in accordance with a first rhythm that is a constant rhythm. Input information acquisition step for acquiring a time series of the person's exercise information, and sound stimulation is performed with a second rhythm that is a rhythm different from the first rhythm for the subject who is performing a predetermined operation in accordance with the first rhythm The disturbing effect measurement unit measures the disturbing effect based on the time interval when the subject performed a predetermined action before and after the sound stimulus is presented in the second rhythm, and the disturbing effect is generated. And a step of measuring a disturbing effect for determining that a sound stimulus is perceived.

  In order to solve the above-described problem, according to another aspect of the present invention, in the perceptual sensitivity evaluation method, an input information acquisition unit performs a predetermined operation in accordance with a first rhythm that is a constant rhythm. An input information acquisition step for acquiring a time series of the exercise information of the person, and a first rhythm in a second rhythm that is a rhythm different from the first rhythm for the subject performing a predetermined action in accordance with the first rhythm The stimulus is assumed to be presented, and the disturbing effect measuring unit measures the disturbing effect based on an interval of time when the subject performs a predetermined action before and after the first stimulus is presented in the second rhythm, A disturbing effect measuring step for determining that the first stimulus is being perceived when the disturbing effect has occurred.

  According to the present invention, whether or not the subject perceives a stimulus without depending on the subject's answer, does not require the value of the light delay, and does not necessarily require the presentation of the light stimulus. There is an effect that can be evaluated.

The figure for demonstrating the example by which light stimulus and sound stimulus are shown in 1st embodiment. The figure showing the ratio of the tap interval before and after the sound shift insertion obtained by each sine wave (2 types) and each subject (3 persons) when the sense level is -20 to 50. The figure showing the change of the tap space | interval before and behind sound gap insertion. The functional block diagram of the perceptual sensitivity evaluation apparatus which concerns on 1st embodiment. The figure which shows the example of the processing flow of the perceptual sensitivity evaluation apparatus which concerns on 1st embodiment. The figure which shows the example of the presentation method of sound stimulation. The figure which shows the example of the presentation method of sound stimulation. The figure which shows the example of the time change of a light stimulus and a sound stimulus. The figure for demonstrating the example by which a light stimulus and a sound stimulus are shown in the modification of 1st embodiment. The functional block diagram of the perceptual sensitivity evaluation apparatus which concerns on 2nd embodiment. The figure which shows the example of the processing flow of the perceptual sensitivity evaluation apparatus which concerns on 2nd embodiment. The figure which shows the example of the sound pressure level controlled by a control part.

  Hereinafter, embodiments of the present invention will be described. In the drawings used for the following description, constituent parts having the same function and steps for performing the same process are denoted by the same reference numerals, and redundant description is omitted.

<Principle>
In the present embodiment, as in Non-Patent Document 1, sound and light are presented at a constant rhythm. The rhythm means a temporal change of a certain object (for example, sound or light). In this embodiment, a rhythm is presented by the presence of sound and the flashing of light. However, the light is presented so as to be a measure of rhythm, and is not always necessary.

  When a human performs a predetermined operation (tap), it is considered that the sound stimulation (hereinafter also referred to as auditory stimulation) obstruction effect for the operation is high. Therefore, the subject is instructed to make a beat with a constant rhythm with reference to the rhythm of light (corresponding to a predetermined operation, and in this embodiment, a touch panel or a switch is tapped). At the same time, the sound stimulus is presented with the same rhythm. At this time, the subject is instructed to ignore the sound. Then, the tapping interval is measured. Next, if the rhythm / timing of the sound is changed at an unpredictable timing, the subject who is hearing the sound may be dragged by the sound and chopped a beat. In the present embodiment, this characteristic is used to measure the disturbing effect on the operation of a certain sound. In addition, the hearing ability can be evaluated and measured with the volume at the time when the volume is gradually increased and the accuracy of chopping a beat with a constant rhythm is lowered. Since the above characteristics have been verified through experiments, the verification results will be described.

<Experimental conditions>
The light stimulus and the sound stimulus used for the evaluation experiment will be described with reference to FIG. FIG. 1 is a diagram for explaining a configuration example of a light stimulus and a sound stimulus presented to a subject in an evaluation experiment of a disturbing effect. First, a light stimulus 5 and a sound stimulus 6 are prepared. The plurality of photostimulations 5 shown in FIG. 1 are distinguished from each other by adding a branch numeral -1, 2, 3,. Similarly, the plurality of sound stimuli 6 shown in FIG. 1 are distinguished by assigning branch numbers -1, 2, 3,.

  In the example of FIG. 1, first, the light stimulus 5 and the sound stimulus 6 are presented simultaneously. An arbitrary time interval is provided between each stimulus.

-Present the light stimulus 5 to the subject at a constant rhythm. The subject is instructed to make a rhythm with a finger so as to synchronize with the presented light stimulus 5. In this experiment, LED blinking is used as a light stimulus. The lighting time (stimulus length D _v ) is set to 100 ms, and the stimulus start time interval IOI _v is set to 500 ms at equal intervals.

At the same time, the sound stimulus 6 is presented to the subject at a constant rhythm. Instruct the subject to ignore the sound. The experiment uses two types of sine waves of 1000Hz and 4000Hz as sound stimuli. Each sine wave is repeatedly turned on and off, the on time (stimulus length D _a ) is set to 100 ms, and the stimulation start time interval IOI _a is set to 500 ms at equal intervals. Experiments with seven types of sound stimulation volume of -20dB, 0dB, 10dB, 20dB, 30dB, 40dB, and 50dB in the sense level (relative level from the minimum audible value). The minimum audible value is the minimum sound level that can be perceived as a sound, and is a value that differs for each subject. The minimum audible value is a value that is measured by a basic hearing test (for example, an audiogram) and serves as a basis for deafness certification. For example, an intermittent sound is presented to the subject, and the subject responds with a button that the sound can be heard or cannot be heard. The examiner adjusts the level according to the reaction (lowering the level if you can hear it, raising the level if you can't hear it) and estimating the minimum audible value.

  In addition, both the light stimulus 5 and the sound stimulus 6 have the same stimulus start time interval of 500 ms, so the ratio of the number of presentations between the light stimulus and the sound stimulus (hereinafter also referred to as the visual to auditory stimulus presentation number ratio) is 1: 1. It is. The length of the stimulus train during the experiment is about 1 minute.

・ The difference between the light stimulus and the sound stimulus (hereinafter also referred to as “sound shift”, also expressed as Δt) is usually 0 ms, but is advanced by 100 ms at random timing. That is, Δt = −100 ms.

Figure 2 shows the ratio (dB) of the tap interval before and after the insertion of the sound deviation obtained by each sine wave (2 types), each sound level (sensory level) (7 types), and each subject (three people). It is. It should be noted that the tap interval after the sound shift is inserted includes a tap interval corresponding to the interval IOI _a including the sound shift, and A (A is an integer of 1 or more) tap intervals ΔT _{m, j} , ΔT _{m, j +1} ,..., ΔT _{m, j + A−1} , and the tap interval before inserting the sound offset includes the tap interval immediately before the tap interval after inserting the sound offset, and A tap intervals ΔT _{m, j−1} , ΔT _{m, j-2} ,..., ΔT _{m, jA} . The vertical axis represents the tap interval ratio (dB), and the horizontal axis represents the sound level (dB HL). In the experiment, the rhythm and timing of the sound are shifted at a timing that the subject cannot expect. In other words, the stimulation start time interval IOI _a is changed. In the example of FIG. 1, causing the sound deviation between the sound 6-4 and sound 6-5, to change the interval IOI _a start time of the stimulus from 500ms to 400 ms. The ratio (dB) of the tap interval before and after insertion of the sound shift in FIG. 2 is the ratio between the tap interval corresponding to the sound 6-3 and the sound 6-4 and the tap interval corresponding to the sound 6-4 and the sound 6-5. Represents. Then, the distance IOI _a start time of the stimulation until the sound 6-5～ sound 6-8 and 500 ms, causing a sound deviation between the sound 6-8 and sound 6-9, interval start time of stimulation IOI Change _a from 500 ms to 600 ms, and then set it to 500 ms. Such a sound shift was generated a plurality of times, and an average and an error range thereof were obtained. At each sound level, each plot through the broken line represents the average, and the upper and lower bars represent the error range.

  FIG. 3 represents the tap interval of the subject 3 at 1 kHz. The vertical axis represents the tap interval, and the horizontal axis represents the tap number. In FIG. 3, the tap number corresponding to the sound 6-5 in FIG. At 20 dB or more, the tap interval becomes shorter at tap number 0, and the tap interval becomes longer at tap number 4 (tap number corresponding to sound 6-9). In FIG. 3, the thick solid line represents the average, and the thin solid line above and below the thick solid line represents the error range.

  It can be seen from FIG. 2 that although there is variation depending on the subject and the frequency, the disturbing effect is produced at a certain level of sound stimulation. For example, the disturbance effect is generated at 20 kHz HL or more at 1 kHz of the subject 3 and at 10 dB or more at 4 kHz. In addition, it can be seen from FIG. 3 that the obstruction effect occurs at 20 dB HL or more at 1 kHz of the subject 3. From this experiment, it can be seen that if the timing of presenting a sound stimulus having a certain level or more is shifted, the accuracy of tapping is affected by the sound stimulus. From these figures, it can be seen that the greater the sensory level, the more likely the interference effect occurs. Also, from these figures, a disturbing effect is recognized by a stimulus of only 10 to 20 dB on the minimum audible value. Conversely, there is a minimum audible value in the range of 10-20 dB from the level where the disturbing effect is first observed.

<First embodiment>
Hereinafter, a perceptual sensitivity evaluation apparatus that measures the disturbance effect on the sound stimulation operation (tap) using the above-described principle will be described.

  FIG. 4 is a functional block diagram of the perceptual sensitivity evaluation apparatus 1 according to the first embodiment, and FIG. 5 shows a processing flow thereof.

  As shown in FIG. 4, the perceptual sensitivity evaluation apparatus 1 of the present embodiment includes a storage unit 11, a control unit 12, a sound presentation unit 13, an input information acquisition unit 14, an interference effect measurement unit 15, and a light presentation unit 16. Composed. Hereinafter, the operation of each component will be described.

<Storage unit 11>
The storage unit 11 stores information for presenting the light stimulus 5 and the sound stimulus 6 by the light presenting unit 16 and the sound presenting unit 13 described later. The light stimulus 5 is a light to be matched when tapping, and the sound stimulus 6 is a sound to be evaluated for a disturbing effect (for example, a sound having a different sensory level or a sine wave having a different frequency). When an image or the like is presented as the light stimulus 5 on the light presentation unit 16 (for example, a display), information necessary for image display is stored. Further, in the case where LED light or the like is presented as the light stimulus 5 by the light presentation unit 16 (for example, LED), a control signal is output from the control unit 12 described later, and the storage unit 11 is provided with the light presentation unit 16. Information for presentation may not be stored. For example, the light stimulus 5 is assumed to use the same light stimulus prepared in advance regardless of the type of the sound stimulus 6. Note that the light stimulus 5 and the sound stimulus 6 may not be stored in the storage unit 11 in advance, and may be input from the outside, for example. In this case, the storage unit 11 can be omitted.

  In the present embodiment, the light presentation unit 16 is an LED, and is configured to output a control signal for blinking the LED from the control unit 12 to be described later, and the light stimulus 5 is presented to the storage unit 11 by the light presentation unit 16. It is assumed that no information has been stored. It is also assumed that information for presenting a sine wave having a predetermined frequency as the sound stimulus 6 and presenting the sine wave having a predetermined frequency by the sound presenting unit 13 is stored in the storage unit 11. The light intensity of the light stimulus 5 or the sound intensity (sound pressure) of the sound stimulus 6 may be a predetermined intensity, or the operator of the perceptual sensitivity evaluation apparatus 1 may use the light presenter 16 or the sound. The information may be changed by operating the presenting unit 13, or information indicating the strength is stored in the storage unit 11, and is emitted and reproduced from the light presenting unit 16 or the sound presenting unit 13 with the strength according to the strength. It is good also as a structure to be. For example, the sound intensity is set as the minimum audible value of the subject obtained separately by an audiometer or the like.

<Control unit 12>
The control unit 12 provides information (hereinafter, also referred to as “photostimulation sequence information”) for presenting a sequence of photostimulations composed of a plurality of photostimulations 5 spaced over time for a predetermined time. And information for presenting a sound stimulus sequence composed of a plurality of sound stimuli 6 with a time interval in the sound presenting unit 13 described later (hereinafter also referred to as sound stimulus sequence information). . At this time, the control unit 12 controls the number of repetitions of the light stimulus 5 and the sound stimulus 6 and controls the presentation time of the sound stimulus 6 so as to shift the rhythm and timing of the sound at an unexpected timing of the subject. . For example, by changing the interval IOI _a start time of the sound stimulus, the sound in the unpredictable timing of the subject's rhythm, shifting the timing. In other words, the control part 12 produces | generates sound stimulation row | line information so that a rhythm and timing of a sound may be shifted at the timing which a subject cannot anticipate (S12). More specifically, the control unit 12 includes a plurality of photostimulations 5 having a predetermined time length (for example, 100 ms) and a plurality of photostimulations 5 to be presented in the light presenting unit 16 during a predetermined time interval (for example, 60 s). And a sequence of light stimuli consisting of a regular combination with a time interval (for example, 400 ms) inserted between the sound stimuli and a sequence of sound stimuli 6 to be presented in the sound presenting unit 13 (a plurality of predetermined time lengths (for example, 100 ms)) A combination of sound stimuli 6 and time intervals inserted between them (for example, a sequence of sound stimuli consisting of a 400 ms time interval three or more times, and then a 300 ms time interval at an unexpected timing) Generate the light stimulus string information and the sound stimulus string information so as to be presented at a predetermined timing. For example, the following variations can be considered as a method of presenting sound stimulation. However, the presenting method is not limited to the following variations, and any presentation method may be used as long as the rhythm and timing of the sound can be shifted at an unexpected timing of the subject.

(i) After presenting a sound (three or more times) at _a constant constant rhythm (interval IOI _a ), the interval IOI _a is changed. In this case, the tap intervals are compared before and after the change. For example, the following change patterns can be considered.

  (i-1) Longen (shorten) once and restore (see A of FIG. 6). The period (presentation number) that is long (short) may be more than once. In FIGS. 6 and 7, ● represents the start time of each sound stimulus.

(i-2) Once lengthened (shortened), then shortened (longened) and returned to the original (see B in FIG. 6). In this case, the period (number of presentations) for changing IOI _a may be more than one.

  (i-3) After lengthening, keep it (see C in FIG. 6).

As a variation of the above, once shortened (longer), keep the original IOI _a , and then insert _a longer (shorter) IOI _a (in the case of the above experimental conditions), regular or irregular A pattern (long, short, steady IOI _a ) may be inserted. In FIG. 6, steady IOI _a is expressed as IOI, long IOI _a as IOI ⁺ , and short IOI _a as IOI ⁻ .

In addition, IOI _a may be continuously changed (see FIG. 7). In this case, it is evaluated whether the tap interval changes in conjunction with the change in IOI _a . For example, the evaluation is performed as follows.

-Pay attention to the sections with long and short IOI _a , compare the tap intervals between the two sections, and if there is a significant difference, evaluate that there is a disturbing effect.

・ If the change in IOI _a is periodic, analyze the periodicity of the tap interval (for example, frequency analysis), check if the period matches the period of change in IOI _a (statistical test), and match Is evaluated as having an interfering effect.

In the present embodiment, information for presenting the sound stimulus 6 by the sound presenting unit 13 described later is stored in advance in the storage unit 11. The control unit 12 reads information for presenting the sound stimulus 6 from the storage unit 11 in the sound presenting unit 13 to be described later, generates sound stimulus sequence information, and presents the light stimulus sequence in the light presenting unit 16. Is generated, and the information is output to the sound presenting unit 13 and the light presenting unit 16. Further, the control unit 12 outputs a time series of changes in sound stimulation (for example, _a time series of the interval IOI _a ) to the interference effect measurement unit 15.

<Sound presentation unit 13>
The sound presentation unit 13 receives and reproduces the sound stimulus string information, and presents the sound stimulus that changes with time to the subject (S13). In other words, the sound presenting unit 13 presents a sequence of sound stimuli composed of a plurality of sound stimuli spaced at time intervals. The sound presentation unit 13 includes, for example, an amplifier and a speaker or an amplifier and an earphone. Moreover, you may use the sound stimulus presentation part with which the existing audiometer is equipped.

<Light Presentation Unit 16>
The light presentation unit 16 receives the photostimulation sequence information, emits light corresponding to the photostimulation sequence information, and presents the photostimulation that changes over time to the subject (S16). In other words, the light presentation unit 16 presents a sequence of photostimulations composed of a plurality of photostimulations spaced at time intervals. The light presentation part 16 is comprised by LED and a display, for example.

<Input information acquisition unit 14>
The input information acquisition unit 14 listens to the sound stimulus to be presented, and exercise information of the subject who intends to perform a predetermined action (tap) in accordance with a certain rhythm (in this embodiment, a change in light stimulus). Is acquired (S14). For example, as in experimental conditions, the subject is instructed to press the push button with a finger so as to synchronize with the presented light stimulus 5. You may display so that it may click on a display or may tap a touch panel. And the input information acquisition part 14 acquires the time series of the beat information of the person (target person) who beats according to the row | line | column of the presented light stimulus, listening to the row | line | column of the presented sound stimulus. The beat information includes time when the push button is pressed (for example, start time), time when the display is clicked, time when tapped, and the like, and corresponds to exercise information.

<Interference effect measurement unit 15>
The interference effect measurement unit 15 receives a time series of changes in sound stimulation (for example, _a time series of the interval IOI _a ) from the control unit 12, and _a time series of exercise information (for example, a time series of tap times) from the input information acquisition unit 14. Receive. As described in the above-described control unit 12, the sound stimulus is presented with a rhythm different from the rhythm of the light stimulus to the subject who performs a predetermined operation (tap) according to the rhythm of the light stimulus. .

The interfering effect measuring unit 15 measures the interfering effect based on the interval of time when the subject performs a predetermined operation before and after insertion of the sound deviation of the sound stimulus (before and after the interval IOI _a changes) (S15). When the effect is generated, it is determined that sound stimulation is perceived, and the determination result is output as an output value of the perceptual sensitivity evaluation apparatus 1. For example, first, the interference effect measurement unit 15 performs a time interval ΔT _{m, j} = T _{m, j} −T _{m at which} a predetermined operation (tap) is performed from a time series of exercise information (for example, a time series of tap times). _{, j-1} . Here, j is the tap index. Next, the interference effect measuring unit 15 determines whether or not the tap interval ΔT _{m, j} depends on the sound stimulus interval IOI _{a, j} . The sound stimulus interval IOI _{a, j} is the sound stimulus interval corresponding to the tap interval ΔT _{m, j} , for example, the sound stimulus start time T _a presented immediately before the tap time T _{m, j−1. a} sound stimulus interval _{IOI a, j = T a,} j -T a, j-1 from _j-1 tap time T _m, the start time T _a sound stimulus presented immediately before _j, to _j. If the tap interval ΔT _{m, j} depends on the sound stimulus interval IOI _{a, j} , it indicates that the subject's reaction is dragged by the sound stimulus, so it is determined that there is a disturbing effect, and the sound stimulus It is judged that it is perceived. For example, the variable A is obtained from the tap interval ΔT _{m, j} , and based on the magnitude relationship between the variable A and a predetermined threshold, it is determined whether there is a disturbing effect, and the variable A when it is determined that there is a disturbing effect And a value corresponding to the variable A is output as a perceptual sensitivity evaluation value.

(i) As can be seen from FIG. 3, when a disturbing effect occurs, the tap interval ΔT _{m, j} changes greatly. Therefore, the difference | ΔT _{m, j} −ΔT _{m, j−1} | between the tap intervals before and after the change of the sound stimulation interval IOI _{a, j} increases. Therefore, the interval of the sound stimulus IOI _a, the difference between the spacing of the taps before and after the change of the _{j | ΔT m, j -ΔT m} , j-1 | used as a variable A, interference in the variable A exceeds a predetermined threshold Judged to be effective.

(ii) As can be seen from FIG. 2, when a disturbing effect occurs, the tap interval ΔT _{m, j} changes greatly. Therefore, the tap interval ratio ΔT _{m, j} / ΔT _{m, j-1} or ΔT _{m, j−1} / ΔT _{m, j} before and after the change of the sound stimulation interval IOI _{a , j} is a value away from 1. (In FIG. 2, it is a value away from 0 because it is expressed in dB). Therefore, the ratio of tap intervals before and after the change of the sound stimulation interval IOI _{a, j} ΔT _{m, j} / ΔT _{m, j-1} or ΔT _{m, j-1} / ΔT _{m, j} is used as the variable A, and the variable A Exceeds a certain range (when A <1-α ₁ or A> 1 + α ₂ , α ₁ is a predetermined value greater than 0 and less than 1, and α ₂ is greater than 0. It is determined that there is a disturbing effect on α ₁ and α _{2 (which} may be set as appropriate in an experiment or the like).

(iii) Since the difference or ratio of the average values of the intervals between the taps before and after the change of the sound stimulation interval IOI _{a, j} also shows the same tendency, it can be similarly set as the variable A.

(iv) As can be seen from FIG. 3, when a disturbing effect occurs, the tap interval ΔT _{m, j} changes greatly. For this reason, the variance and standard deviation of the intervals between the taps before and after the change of the sound stimulation interval IOI _{a, j} are increased. Therefore, the variance or standard deviation of the intervals between the taps before and after the change of the sound stimulation interval IOI _{a, j} is used as the variable A, and it is determined that there is a disturbing effect when the variable A exceeds a certain threshold. Further, as can be seen from FIG. 3, when a disturbing effect occurs, the variance σ ² _after and the standard deviation √σ ² _after of the plurality of tap intervals after the change of the sound stimulation interval IOI _{a, j} are the sound stimulation intervals. It becomes larger than the variance σ ² _before and the standard deviation √σ ² _before of the interval between the taps before the change of IOI _{a, j} . And the variance σ ² _after and standard deviation √σ ² _after, the variance σ ² _before and standard deviation √σ ² _before and the difference | σ ² _after -σ ² _before | and | √σ ² _after -√σ ² _before | the variable A may be determined as having a disturbing effect when the variable A exceeds a certain threshold. Furthermore, the ratio of variance σ ² _before and standard deviation √σ ² _before to variance σ ² _before and standard deviation √σ ² _before σ ² _after / σ ² _before , σ ² _before / σ ² _after , √σ ² _after Using / √σ ² _before or √σ ² _before / √σ ² _after as the variable A, it may be determined whether there is a disturbing effect based on the magnitude relationship with the threshold. For example, when σ ² _after / σ ² _before is larger than a predetermined threshold, or when σ ² _before / σ ² _after is smaller than a predetermined threshold, it is determined that there is an interference effect.

(v) As can be seen from FIG. 3, when a disturbing effect occurs, the tap interval ΔT _{m, j} changes greatly. Therefore, the range of the interval between the taps before and after the change of the sound stimulation interval IOI _{a, j} (difference between the maximum value and the minimum value) becomes large. Therefore, the range of the interval between the taps before and after the change of the sound stimulation interval IOI _{a, j} is used as the variable A, and when the variable A exceeds a certain threshold value, it is determined that there is a disturbing effect. In addition, _a variable A is defined as a difference between a plurality of tap interval ranges before the change of the sound stimulus interval IOI _{a, j} and a plurality of tap interval ranges after the change of the sound stimulus interval IOI _{a, j.} If A exceeds a certain threshold value, it may be determined that there is a disturbing effect. Furthermore, using acoustic stimulus interval IOI _a, a range of the plurality of taps of interval before the change in _j, the interval of the sound stimulus IOI _a, the ratio of the range of the plurality of taps of interval after a change in _j as a variable A Similarly to the above (iv), it may be determined whether or not there is a disturbing effect based on the magnitude relationship with the threshold value.

The variable A may be a difference or ratio of tap intervals ΔT _{m , j} in _a plurality of sound stimulus intervals IOI _{a, j} , or a representative sound stimulus interval IOI _{a, j} (1 One or more) and spacing [Delta] T _{m, j} of taps in, a certain reference (for example, when the sound does not exist) interval [Delta] T _m of _taps, or the like may be used difference between the values of _j. For example, the variable A at a certain sound pressure level is an average value when the sound stimulation interval IOI _{a, j} changes from 500 ms to 400 ms. In addition, a plurality of differences, ratios, standard deviations, ranges, and the like may be obtained by a plurality of measurements under the same conditions, and the average value may be used as the variable A.

Various values can be used for the threshold used for the determination. For example, a fixed value obtained empirically may be used. Further, it may be a value relative to the value of A when there is no sound (or when the sound stimulus 6 is presented at a sufficiently low sound pressure). Moreover, you may set according to a subject's characteristic, you may set without matching, for example, you may use a statistical reference | standard. For example, a value that is recognized as having a statistically significant difference from the value of variable A (A _null ) measured during silence may be set as the threshold value. Whether there is a statistically significant difference is determined using, for example, a t test. By adopting such a configuration, the variable A at the time of silence (or when the sound stimulus 6 is presented at a sufficiently low sound pressure) and the variable A when the sound stimulus is presented are compared, and the interference effect is measured. Can do. In other words, when the variable A when the sound stimulus is presented is statistically significant compared to the variable A when there is no sound (or when the sound stimulus 6 is presented at a sufficiently low sound pressure) It is determined that a disturbing effect has occurred.

<Effect>
With such a configuration, whether or not the subject perceives a stimulus without depending on the subject's answer, does not require a value of light delay, and does not necessarily require presentation of a light stimulus. Can be evaluated. This disturbing effect does not occur when the sound is not heard, and the disturbing effect occurs when it is heard. Therefore, the presence or absence of the interfering effect is an indicator of “sound can be heard / not heard”. In the conventional hearing test, the subject responds with a button that the sound is “sound audible / not audible”. In other words, it was a subjective hearing test depending on the responses of the subjects. In subjective hearing tests, people who intentionally make a wrong answer (spoofing, in short, pretend to be “sound” but pretend to be “inaudible”) and hearing loss (functional deafness) due to some psychological factor. In the case of the subject, it was difficult to correctly evaluate hearing ability. There are objective tests (such as auditory brainstem response) to prevent fraud, but only by evaluating the functions of the brainstem etc., it was not possible to determine whether the subject was actually listening. If it is the structure of this embodiment, the psychological test which does not depend on a test subject's direct reply can be implemented. In order for the subject to pretend to be inaudible, it is necessary to continue tapping according to a certain rhythm (the rhythm of the light stimulus presented in the present embodiment, or a certain rhythm set by the examinee) When sound is heard, tapping cannot be continued at a constant rhythm due to the disturbing effect of sound stimulation. Therefore, fraud can be prevented. Similarly, hearing ability can be correctly evaluated for a subject with functional hearing loss. In addition, it can function as a diagnostic tool for estimating a damaged site by accumulating data by using it together with an objective test (such as an auditory brainstem reaction).

<Modification>
The type of visual stimulus is not limited to blinking of light, but may be any type of characteristic change (temporal change) in which a rhythm is easy to cut. The stimulation length _Dv may be a length that allows easy tapping (several tens to several hundreds of ms) or a length that allows a characteristic change to be easily cut into rhythms. The stimulation interval IOI _v may be an interval that is easy to tap (about 250 to 2000 ms). The visual stimulus is presented for the purpose of assisting the subject's spontaneous rhythmic movement. For this reason, if the target person ticks the rhythm, it is not necessary to present it. In addition to the visual stimulus, a stimulus other than the visual stimulus (for example, a tactile stimulus by vibration or the like) may be used as long as the stimulus is a guide so that the subject can easily cut the rhythm.

The auditory stimulus may be anything that changes some attribute and the change timing (temporal change) can be defined (for example, frequency change, pitch change). The stimulus length _Da is typically matched to the length of the visual stimulus, but is not limited to this as long as it is easy to perceive the timing of the stimulus. The stimulation interval IOI _a may be the same as or close to that of visual stimulation (about ± 500 ms). In the present embodiment, the stimulus interval IOI _a of the sound stimulus being presented is changed by 100 ms at random (the subject cannot predict), but even if the magnitude of this change is larger than this (˜change) Previous IOI _a ), it may be so small that changes cannot be perceived (about 5 ms). It is known that a disturbing effect occurs even when the rhythm change of the sound is so small that it is not noticed (see Reference 1).
(Reference 1) Repp, BH (2001a). "Phase correction, phase resetting, and phase shifts after subliminal timing perturbations in sensorimotor synchronization", Journal of Experimental Psychology: Human Perception & Performance, 27, p.600-621, 2001 .

In the present embodiment, the stimulation interval IOIa of the sound stimulus being presented is changed at _a random timing (the subject cannot be expected), but the sound may be presented from the silent state. The stimulation level includes a level (or amount of change) that is so low that it cannot be perceived.

  The length of the test stimulus column may be short as long as the time series of beat information can be measured. For example, it may be about 5 seconds.

  Furthermore, in this embodiment, sound stimulation (hereinafter also referred to as “disturbing stimulation” or “first stimulation”) is used, but the present invention is not limited to such stimulation. If the characteristics of each stimulus are adjusted so that the rhythmic action (tapping) is likely to be disturbed by the timing of the disturbing stimulus, it is possible to inspect another sensory attribute. For example, vibration and light can be considered as disturbing stimuli. Thereby, not only the sensitivity to sound but also the sensitivity to vibration and light can be measured. When using a light stimulus or a vibration stimulus instead of a sound stimulus as a disturbing stimulus, a light presenting part or a vibration presenting part (vibrator or the like that changes with time, such as a vibrator) is presented instead of the sound presenting part. Can be used). This makes it possible to measure not only the sensitivity to sound but also the sensitivity to light and vibration.

Further, as described in the above <controller 12>, as shown in FIGS. 6 and 7, to the spacing IOI _a sound stimulus may be fixed or may be varied.

  Arbitrary light can be used for light stimulation. For example, a display or the like may be used in addition to the LED. Moreover, you may give timing other than blinking. For example, the intensity and color of light may be changed without blinking, or the image to be displayed on the display may be changed.

  Any sound can be used for sound stimulation. Any attribute can be used as long as the timing can be defined, and various attributes can be used in addition to the presence or absence of sound. For example, the volume, frequency, sound quality, pitch, and interaural time difference may be changed. When these attributes are changed, for example, the sensitivity to changes in volume, frequency, sound quality, pitch, and interaural time difference can be measured. Further, the sound stimulation may be as low as the subject cannot perceive, but avoid a loud sound that causes hearing loss.

  Although the intensity of the light stimulus 5 is not basically limited, it is desirable to avoid an intensity that cannot be perceived or a magnitude that is large enough to cause visual loss, and to keep it within a perceivable range.

  Moreover, the light stimulus and the sound stimulus do not need to be intermittent. In other words, there is no need for any time interval between stimuli. For example, it suffices if the change timing can be defined as shown in FIG. In FIG. 8, the horizontal axis represents time, and the vertical axis represents stimulus intensity (or pitch, color, etc.).

  Further, exercise information other than beat information may be used as long as the subject's reaction can be acquired. For example, a part of the subject's body may be photographed with a camera or the like, and the movement (for example, blinking or dancing) may be acquired as a reaction and acquired as exercise information.

If the influence of the presence of a sound stimulus can be evaluated, the interference effect can be evaluated by: (i) the difference between tap intervals before and after the change of the sound stimulus interval IOI _{a, j} | ΔT _{m, j} −ΔT _{m, j−1} | (ii) the sound stimulus interval IOI _a, the ratio [Delta] T _m spacing taps before and after the change of the _{j, j / ΔT m, j} -1, (iii) the sound stimulus interval IOI _a, plurality of taps before and after the change of the _j The difference or ratio of the average value of the intervals of (iv), the variance of the intervals of multiple taps before and after the change of the sound stimulation interval IOI _{a, j} , standard deviation, (v) range (difference between the maximum and minimum values) It is not limited to any type.

  In this embodiment, the sound presenting unit 13 and the light presenting unit 16 are part of the perceptual sensitivity evaluation apparatus 1, but may be configured as separate apparatuses. In the present embodiment, the control unit 12 generates the sound stimulus sequence information and the light stimulus sequence information and outputs them to the sound presenting unit 13 and the light presenting unit 16, respectively. However, the sound presenting unit 13 and the light presenting unit 16 are provided. It is also possible to regenerate and radiate sound and light stimuli mainly in step 1, and inform the control unit 12 of the reproduction time and radiation time. In that case, it is good also as a structure which calculates | requires each irritation | stimulation row | line | column information from reproduction | regeneration time and radiation | emission time, and outputs it to the disturbance effect measurement part 15. FIG.

In this embodiment, a sound stimulus is presented to a subject at a certain rhythm (hereinafter also referred to as “first rhythm”), and then a predetermined operation (in accordance with the first rhythm is performed while listening to the presented sound stimulus ( The sound stimulus is presented to the subject who is performing the tap) at a rhythm different from the first rhythm (hereinafter also referred to as “second rhythm”). However, it may be configured not to present the first rhythm sound stimulus. In that case, the subject cuts (tap) the rhythm with the finger with the first rhythm in the absence of sound stimulation. At this time, a light stimulus may be presented so as to be a rhythm guide. FIG. 9 is a diagram illustrating a configuration example of the light stimulus and the sound stimulus presented to the subject in the evaluation effect of the interference effect. The input information acquisition unit 14 acquires a time series of exercise information of a subject who intends to perform a predetermined operation (tap) intentionally according to the first rhythm. At this time, the point from which the subject does not listen to the sound stimulus presented is different from the present embodiment. Next, present the sound stimulus with the second rhythm at an unexpected timing. The control unit 12 generates light stimulus train information and sound stimulus train information over a predetermined time. At this time, the control unit 12 controls the number of repetitions with the light stimulus 5 and controls the presentation time to present the sound stimulus with the second rhythm at a timing that the subject cannot expect. The interfering effect measurement unit 15 receives a time series of changes in the sound stimulation of the second rhythm (for example, the presentation start time of the sound stimulation of the second rhythm and the time series of the subsequent interval IOI _a ), and receives from the input information acquisition unit 14. A time series of exercise information (for example, a time series of tap times) is received. The interference effect measuring unit 15 measures the interference effect based on the interval of time when the subject performs a predetermined action before and after the presentation of the sound stimulus of the second rhythm is presented. Is determined to perceive a sound stimulus, and the determination result is output as an output value of the perceptual sensitivity evaluation apparatus 1. The measurement method is the same as in the first embodiment. In the case of this modification, the interference effect measurement unit 15 may use the following determination method in addition to the above-described interference effect determination method.

・ As can be seen from FIG. 2 and FIG. 3, when the interference effect occurs, the error range becomes small (for example, the error range is large at 10 dB or less in FIG. The error range is larger at 20 dB and above in Fig. 3). This is because the subject performs a predetermined operation (tap) under the influence of the sound stimulus (because the sound stimulus is used as an index of the tap timing), and thus the variation is smaller than when there is no sound stimulus (index). This is probably because of this. Therefore, the error range after the presentation of the sound stimulus of the second rhythm is presented as the variable A, and it is determined that there is a disturbing effect when the variable A is smaller than a certain threshold value. The difference between the error range before the presentation of the second rhythm sound stimulus and the error range after the presentation of the second rhythm sound stimulus is defined as variable A, and variable A is a constant threshold. It may be determined that there is an interfering effect when exceeding. Further, the ratio of the error range before the presentation of the second rhythm sound stimulus and the error range after the presentation of the second rhythm sound stimulus is used as the variable A, and the disturbance of this embodiment Similarly to the determination methods (iv) and (v) of the effect measurement unit 15, it may be determined whether or not there is a disturbing effect based on the magnitude relationship with the threshold.

<Second embodiment>
A description will be given centering on differences from the first embodiment.

  Hereinafter, a perceptual sensitivity evaluation apparatus according to the second embodiment, in which a part of the first embodiment is changed, will be described with reference to FIGS. FIG. 10 is a block diagram showing the configuration of the perceptual sensitivity evaluation apparatus 2 of the present embodiment. FIG. 11 is a flowchart showing the operation of the perceptual sensitivity evaluation apparatus 2 of the present embodiment. As shown in FIG. 10, the perceptual sensitivity evaluation apparatus 2 according to the present embodiment includes a storage unit 11, a control unit 22, a sound presentation unit 13, an input information acquisition unit 14, a disturbance effect measurement unit 25, and a light presentation. Part 16. The difference between the first embodiment and the present embodiment is that the control unit 12 in the first embodiment is changed to the control unit 22 in the present embodiment, and the disturbance effect measuring unit 15 in the first embodiment is different from the first embodiment. This is only the point that the interference effect measuring unit 25 is changed. Only the configuration different from the first embodiment will be described below.

<Control unit 22>
The control unit 22 according to the present embodiment generates the light stimulus train information and the sound stimulus train information, and simultaneously executes the sound pressure level control (S22). Specifically, the control unit 22 acquires information indicating the presence / absence of the interfering effect from the interfering effect measuring unit 25, and when there is an interfering effect (in other words, ΔT _{m, j} depends on IOI _{a, j} The sound pressure level of the sound stimulus is reduced and the sound pressure level of the sound stimulus is increased when there is no interference effect (when ΔT _{m, j} does not depend on IOI _{a, j} ). For example, when the control unit 22 receives information indicating that there is no interference effect (ΔT _{m, j} does not depend on IOI _{a, j} ) from the interference effect measurement unit 25, the sound pressure level of the sound stimulus 6 is input. Is controlled to be higher (larger) than the current sound pressure level, and if information indicating that there is a disturbing effect (ΔT _{m, j} depends on IOI _{a, j} ) is input, the sound of sound stimulus 6 The pressure level is controlled to be lower (smaller) than the current sound pressure level. In addition, the determination method of the interference effect in the interference effect measurement part 25 is the same as that of 1st embodiment. For example, the variable A is obtained from the tap interval ΔT _{m, j} , and it is determined whether there is a disturbing effect based on the magnitude relationship between the variable A and a predetermined threshold. The sound presentation unit 13 reproduces the sound stimulus information sequence generated by the control unit 22 controlling the sound pressure level during a predetermined time interval, and presents the sound stimulus that changes over time to the subject (S13). .

<Interference Effect Measurement Unit 25>
The interfering effect measuring unit 25 receives the time series of the change of the sound stimulus (for example, the time series of the interval IOI _a ) and the sound pressure level of the sound stimulus 6 from the control unit 22, and receives the time of the exercise information from the input information acquisition unit 14. Receive a series. The disturbing effect measuring unit 25 measures the disturbing effect based on the time interval when the subject performs a predetermined operation before and after the interval IOI _a changes (S25), and the output of the perceptual sensitivity evaluation apparatus 2 Output as a value. In the present embodiment, the minimum value of the sound pressure levels when it is determined that there is a disturbing effect is used as the measured value of the disturbing effect. The interference effect measuring unit 25 determines whether or not a predetermined condition is satisfied (S26), and when the predetermined condition is satisfied, the minimum value among the sound pressure levels determined to have an interference effect is disturbed. Output as measured value of effect. The interference effect measuring unit 25 transmits information indicating the presence or absence of the interference effect to the control unit 22 when the predetermined condition is not satisfied. The control unit 22 controls the sound pressure level to be small when there is a disturbing effect, and controls the sound pressure level to be large when there is no disturbing effect, so that the minimum audible value and the level of the disturbing effect match. If so, the sound pressure level is controlled as shown in FIG. Therefore, a value when the sound pressure level has converged to some extent is desired to be a measured value of the interference effect. Therefore, the predetermined condition is a condition for determining whether or not the sound pressure level has converged. For example, the following conditions can be considered as the predetermined conditions.
(1) When the number of interference effect judgments exceeds a certain number
(2) When the difference between the sound pressure level when it is determined that there is no interfering effect and the sound pressure level when it is determined that there is an interfering effect is smaller than a predetermined threshold, or a combination thereof (Or condition, and condition) may be used as the predetermined condition.

<Effect>
With such a configuration, the same effect as in the first embodiment can be obtained. In this embodiment, it is possible to measure the minimum sound pressure level at which an interference effect can be obtained. Since the minimum sound pressure level obtained corresponds to the minimum audible value, the perceptual sensitivity evaluation device can function as a hearing measurement device with such a configuration. Therefore, it can be said that the disturbance effect measuring unit 25 measures the hearing based on the sound pressure level of the sound stimulus when it is determined that there is a disturbance effect. In addition, you may combine this embodiment, 1st embodiment, and its modification. For example, the same control may be performed by the control unit of the first embodiment, and the disturbance effect measurement unit may output a variable A and a value corresponding to the variable A when a predetermined condition is satisfied.

<Modification>
In the present embodiment, the control unit 22 performs sound pressure level control, but information (for example, a value corresponding to the variable A or the variable A) indicating the presence or absence of a disturbing effect is displayed on a display or the like, and an operation by a doctor or the like. The person may make a determination based on the information and execute whether to increase or decrease the volume in the sound presenting unit 13.

  The present invention is not limited to the above-described embodiments and modifications. For example, the various processes described above are not only executed in time series according to the description, but may also be executed in parallel or individually as required by the processing capability of the apparatus that executes the processes. In addition, it can change suitably in the range which does not deviate from the meaning of this invention.

  For example, a part of the configuration of the perceptual sensitivity evaluation apparatus may be replaced with an existing device. For example, the sound presentation unit 13 may be replaced with an existing audiometer.

  Further, for example, if the frequency difference is controlled with the settings as in other stimulation examples 1 and 2 in FIG. 8 in addition to obtaining the minimum audible value by controlling the sound pressure level, the “minimum audible frequency change” related to the frequency difference. That is, the sensitivity to frequency changes can be obtained. For example, as a disturbing stimulus, a sound whose frequency changes at a constant rhythm (for example,…, <f>, <f>, <f>, <f + Δf>, <f>, <f>, <f>, <f f + Δf>, <f>, <f>, <f>, where f is the reference frequency and Δf is the amount of change in frequency), and the frequency change amount Δf is controlled (increased or decreased) ), The minimum audible frequency change (indicating sensitivity to frequency change) can be obtained. Further, if the stimulus is not sound but vibration, the minimum perception threshold regarding vibration can be obtained. Similarly, in combination with the modification of the first embodiment, the disturbing stimulus may be vibration, light, or the like. In short, it is sufficient to prepare stimuli to be evaluated as perceptual sensitivity (targets for determining whether or not a subject can perceive) as disturbing stimuli, and they only have to change with time. In the second embodiment, the perceptual threshold for the disturbing stimulus can be obtained by changing the disturbing stimulus within a predetermined range (for example, in the vicinity of the lower limit value at which the person can perceive the disturbing stimulus). A statistical value or the like may be used as a criterion value for the perception threshold.

<Program and recording medium>
In addition, various processing functions in each device described in the above embodiments and modifications may be realized by a computer. In that case, the processing contents of the functions that each device should have are described by a program. Then, by executing this program on a computer, various processing functions in each of the above devices are realized on the computer.

  The program describing the processing contents can be recorded on a computer-readable recording medium. As the computer-readable recording medium, for example, any recording medium such as a magnetic recording device, an optical disk, a magneto-optical recording medium, and a semiconductor memory may be used.

  The program is distributed by selling, transferring, or lending a portable recording medium such as a DVD or CD-ROM in which the program is recorded. Further, the program may be distributed by storing the program in a storage device of the server computer and transferring the program from the server computer to another computer via a network.

  A computer that executes such a program first stores, for example, a program recorded on a portable recording medium or a program transferred from a server computer in its storage unit. When executing the process, this computer reads the program stored in its own storage unit and executes the process according to the read program. As another embodiment of this program, a computer may read a program directly from a portable recording medium and execute processing according to the program. Further, each time a program is transferred from the server computer to the computer, processing according to the received program may be executed sequentially. Also, the program is not transferred from the server computer to the computer, and the above-described processing is executed by a so-called ASP (Application Service Provider) type service that realizes the processing function only by the execution instruction and result acquisition. It is good. Note that the program includes information provided for processing by the electronic computer and equivalent to the program (data that is not a direct command to the computer but has a property that defines the processing of the computer).

  In addition, although each device is configured by executing a predetermined program on a computer, at least a part of these processing contents may be realized by hardware.

Claims (8)

An input information acquisition unit that acquires a time series of exercise information of a subject who is going to perform a predetermined action in accordance with a first rhythm that is a constant rhythm;
It is assumed that sound stimulation is presented with a second rhythm that is a rhythm different from the first rhythm to the subject who is performing the predetermined movement in accordance with the first rhythm, and a sound is generated with the second rhythm. The disturbance effect is measured based on the time interval at which the subject performs the predetermined action before and after the stimulus is presented, and it is determined that the sound stimulus is perceived if the disturbance effect occurs. Including a disturbance effect measurement unit,
Perceptual sensitivity evaluation device. The perceptual sensitivity evaluation apparatus according to claim 1,
First, a sound stimulus is presented to the subject in the first rhythm, and then to the subject performing the predetermined operation in accordance with the first rhythm while listening to the presented sound stimulus. Sound stimulation is presented in the second rhythm,
Perceptual sensitivity evaluation device. The perceptual sensitivity evaluation apparatus according to claim 1 or 2,
In the disturbing effect measuring unit, the hearing is measured based on the sound pressure level of the sound stimulation when it is determined that there is a disturbing effect.
Perceptual sensitivity evaluation device. An input information acquisition unit that acquires a time series of exercise information of a subject who is going to perform a predetermined action in accordance with a first rhythm that is a constant rhythm;
The first stimulus is presented to the subject who is performing the predetermined movement in accordance with the first rhythm with a second rhythm that is a rhythm different from the first rhythm, and the second rhythm The disturbance effect is measured based on the time interval when the subject performs the predetermined action before and after the first stimulus is presented in step 1. If the disturbance effect occurs, the first stimulus is perceived. Including an interference measurement unit that determines that the
Perceptual sensitivity evaluation device. The perceptual sensitivity evaluation apparatus according to claim 4,
By changing the first stimulus in the vicinity of the lower limit of a range that can be perceived by a human, the perception threshold of the subject with respect to the first stimulus is obtained.
Perceptual sensitivity evaluation device. An input information acquisition step in which an input information acquisition unit acquires a time series of exercise information of a subject who intends to perform a predetermined action in accordance with a first rhythm that is a constant rhythm;
Sound stimulation shall be presented in a second rhythm that is different from the first rhythm to the subject who is performing the predetermined operation in accordance with the first rhythm, and a disturbance effect measuring unit, Before and after the sound stimulus is presented in the second rhythm, the disturbing effect is measured based on the time interval when the subject performs the predetermined action, and the sound stimulus is perceived when the disturbing effect occurs. Including a step of measuring a disturbance effect that is determined to be
Perceptual sensitivity evaluation method. An input information acquisition step in which an input information acquisition unit acquires a time series of exercise information of a subject who intends to perform a predetermined action in accordance with a first rhythm that is a constant rhythm;
The first stimulus is presented in a second rhythm that is a rhythm different from the first rhythm to the subject who is performing the predetermined operation in accordance with the first rhythm, and a disturbance effect measuring unit However, before and after the first stimulus is presented in the second rhythm, the interference effect is measured based on the time interval when the subject performs the predetermined action, and the interference effect is occurring. A disturbing effect measuring step for determining that the first stimulus is perceived,
Perceptual sensitivity evaluation method.   The program for functioning a computer as a perceptual sensitivity evaluation apparatus in any one of Claims 1-5.

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