JP2009172371A - Sound reproduction unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound reproduction unit which can output an output signal with a frequency component which is not dependent on a frequency component of sound source signals accumulated in a database. <P>SOLUTION: The sound reproduction unit 40 comprises a parameter housing section 410 to preliminarily house psychosomatic specific information and parameters representing a correlation between psychosomatic specific information, an input section 420 to input present condition specific information and target condition specific information, a parameter read-out section 430 to read out a parameter representing the correlation between the present condition specific information and the target condition specific information from the parameter housing section 410, a non-audible sound control section 440 to create an output signal Y(t) by creating non-audible sound X(t) for changing the present psychosomatic condition to the target psychosomatic condition based on the parameter and adding the created non-audible sound X(t) to the sound source signal inputted from the sound source input device 30, and an output section 450 to make a subject hear the output signal Y(t) created by the non-audible sound control section 440. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound reproducing device.

In recent years, relaxation therapy systems using sound have been known. For example, the system described in Patent Document 1 interviews a subject in a state where sound information that has been confirmed to be effective in advance is stored in a database in advance, and based on the result of the interview, an appropriate sound Is a relaxation therapy system that extracts the information from the database and provides it to the subject.
JP-A-10-118185

  For example, in the conventional system described in Patent Document 1, a sound source signal stored in advance in a database is provided to the subject as an output signal of the system. For this reason, when using the system described in Patent Document 1, it is necessary to store in advance all sound source signals having different frequency components for each result of the inquiry, which increases the capacity of the database. Is concerned. This problem seems to be due to the fact that the frequency component of the output signal of the system depends on the frequency component of the sound source signal stored in the database.

  Therefore, the present invention has been made in view of the above, and it is possible to output an output signal having a frequency component that does not depend on the frequency component of the sound source signal accumulated in the database, and further the psychosomatic state of the subject by the output signal. An object of the present invention is to provide a sound reproducing device capable of changing the sound.

  In order to solve the above-described problem, the sound reproduction device of the present invention includes a plurality of psychosomatic state specifying information for specifying a subject's psychosomatic state, and a plurality of parameters for specifying correlations between the plurality of psychosomatic state specifying information, Storage means for storing in advance, current state input means for receiving input of current state specifying information for specifying the current mind-body state of the subject, and changing the current mind-body state of the subject to another mind-body state of the subject Target state input means for receiving an input of target state specifying information for specifying a target psychosomatic state as a target when the current state is input, current state specifying information received by the current state input means, and target state specification received by the target state input means A parameter reading means for reading out a parameter for specifying a correlation between the information and the storage means, and an input of an arbitrary sound source signal; And generating a non-audible sound to be heard by the subject to change the current psychosomatic state of the subject to the target psychosomatic state of the subject based on the parameter read by the parameter reading means. A non-audible sound adding means for generating an output signal by adding the generated non-audible sound to the sound source signal received by the sound source input means; and an output signal generated by the non-audible sound adding means to the subject. Output means for outputting. Here, the non-audible sound adding unit may generate the output signal by adding the generated non-audible sound and the sound source signal input from the sound source input unit.

  According to such a sound reproducing apparatus of the present invention, the output signal provided to the subject is obtained by adding a non-audible sound to an arbitrary sound source signal. That is, the frequency component of the output signal has no relation to the frequency component of the sound source signal, and changes depending on the frequency component of the non-audible sound to be added. Therefore, according to the present invention, it is possible to output an output signal having a frequency component that does not depend on the frequency component of the sound source signal. Furthermore, since the output signal does not depend on the sound source signal, the storage means does not need to accumulate different sound source signals for each psychological and physical condition of the subject, for example. For this reason, it is possible to prevent an increase in the storage capacity necessary for configuring the storage means.

  The non-audible sound is generated based on parameters stored in the storage means. Since this parameter represents the correlation between a plurality of psychosomatic states of the subject, the parameter reading means appropriately selects a parameter corresponding to the correlation between the current psychosomatic state of the subject and the target psychosomatic state. By outputting to the non-audible sound adding means, the non-audible sound adding means can generate an appropriate non-audible sound for changing the current psychosomatic state of the subject to the target psychosomatic state. Then, by providing this non-audible sound together with the sound source signal to the subject, it is possible to provide the subject with an appropriate relaxation therapy for changing the subject's current psychosomatic state to the target psychosomatic state.

  In the present invention, the parameter may be at least one of a frequency in a non-audible region, an amplitude at the frequency, and a phase at the frequency.

  According to the present invention, by using at least one parameter among the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency, the non-audible sound adding means can target the current psychosomatic state of the subject. Appropriate non-audible sound for changing to a psychosomatic state can be generated.

In the present invention, the non-audible sound adding means, when the parameter read by the parameter reading means indicates the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency, The following mathematical formula (1)
X (t) = a {1 + sin (2πft−θ)} (1)
The non-audible sound X (t) is generated by the following equation (2)
Y (t) = X (t) s (t) (2)
(Where f represents the frequency, a represents the amplitude at the frequency f, θ represents the phase at the frequency f, s (t) represents the sound source signal, and t represents time. )
Thus, the non-audible sound X (t) and the sound source signal s (t) may be multiplied to generate the output signal Y (t).

（式中、ｆ_ｉは前記複数の周波数のうちの一つを表し、ａ_ｉは該周波数ｆ_ｉでの振幅を表し、θは該周波数ｆ_ｉでの位相を表す。）
により、前記非可聴音Ｘ（ｔ）を生成しても良い。 Further, in the present invention, the non-audible sound adding unit is configured such that when the parameter read by the parameter reading unit indicates n frequencies, amplitudes, and phases, the following mathematical formula (3):

(Where f _i represents one of the plurality of frequencies, a _i represents the amplitude at the frequency f _i , and θ represents the phase at the frequency f _i ).
Thus, the non-audible sound X (t) may be generated.

  According to these inventions, the non-audible sound adding means uses the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency as parameters in the above formulas (1) to (3). An appropriate non-audible sound X (t) and an output signal Y (t) for changing the current psychosomatic state of the subject to the target psychosomatic state can be generated.

  In the present invention, the parameter may further include at least one of a frequency in the audible region, an amplitude at the frequency, and a phase at the frequency.

  According to the present invention, by further using at least one parameter among the frequency in the audible region, the amplitude at the frequency, and the phase at the frequency, the non-audible sound adding means targets the current psychosomatic state of the subject. Appropriate non-audible sound for changing to a psychosomatic state can be generated. By using the parameter related to the audible sound when generating the non-audible sound, the non-audible sound adding means can generate the non-audible sound reflecting the fluctuation in frequency.

  In the present invention, the parameter may further include a time elapsed after the output means outputs the output signal to the subject.

  According to this invention, the non-audible sound adding means changes the current mind-body state of the subject to the target mind-body state by using the time elapsed since the output means outputs the output signal to the subject as a further parameter. A suitable non-audible sound can be generated. By using the parameter related to the output signal already output when generating the non-audible sound, the non-audible sound adding means can generate the non-audible sound reflecting the fluctuation in time.

  In the present invention, the output means may amplify a frequency component in the non-audible region among the frequency components of the output signal, and then output the output signal to the subject.

  According to this invention, the output means can increase the ratio of the frequency component in the non-audible region in the entire output signal by amplifying the frequency component in the non-audible region among the frequency components of the output signal.

  In the present invention, the output means may output the output signal to the subject at a predetermined output frequency, output time, or output time.

  According to the present invention, the output means outputs an output signal to the subject in accordance with a predetermined output frequency, output time, or output time, so that the current psychosomatic state of the subject is changed to the target psychosomatic state. A simple output signal can be provided to the subject.

  According to the present invention, it is possible to output an output signal having a frequency component that does not depend on the frequency component of the sound source signal stored in the database, and to further change the subject's mind and body state by the output signal. A playback device can be provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a sound reproducing device according to the invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

(Overall configuration of mind-body state change system 1)
A configuration of a mind-body state change system 1 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a mind-body state change system 1. As shown in FIG. 1, the psychosomatic state changing system 1 includes a psychosomatic state measuring device 10, an external input device 20, a sound source input device 30, and a sound reproducing device 40. The psychosomatic state measuring device 10, the external input device 20, and the sound source input device 30 are connected to the sound reproducing device 40 through a communication interface (I / F, not shown), for example. Hereinafter, each component of the mind-body state change system 1 is demonstrated in detail.

(Mental and physical state measurement device 10)
The psychosomatic state measuring device 10 is a device that measures the current psychosomatic state of a subject. FIG. 2 shows an example of an index used when the psychosomatic state measuring apparatus 10 measures the current psychosomatic state of the subject and an example of a method for measuring the index. As shown in FIG. 2, “result of psychological test by POMS or the like” is used as an index for the subject's “mood”, and this index can be obtained by the “self-written” method. Moreover, as a parameter | index with respect to a test subject's "degree of dementia", the result of a neuropsychological test etc. is used, and this parameter | index can be obtained by the "face-to-face inquiry type" method. In addition, as the index of the subject's “brain”, “results of measuring electroencephalogram, cerebral blood flow, etc.” are used, and this index can be measured in real time by “electroencephalograph, MRA, etc.”. In addition, as an index for the subject's "eye", "measurement results of pupils, irises, eye movements, fixation micromotion, etc." are used, and this index should be measured in real time by a "head-mounted measuring device, etc." Can do. Further, “measurement result of body temperature, pulse, etc.” is used as an index for the “body” of the subject, and this index can be measured in real time by “a wearable measuring device such as a finger wrist arm”. In addition, “measurement result of blood, saliva, sweating, etc.” is used as an index for “body fluid” of the subject, and this indicator is measured in real time by “blood test device, wearable measuring device (saliva, sweating, etc.)” can do. Further, “sex, age, etc.” is used as an index for the “individual information” of the subject, and this index can be obtained by the “self-writing” method.

  The psychosomatic state measuring apparatus 10 comprehensively determines the current state of mind of the subject based on the above index. Examples of the subject's current state of mind and physical condition are, for example, “I am not feeling well”, “I feel frustrated”, “I can't concentrate”, “I feel angry”, “Mild dementia”, “I'm forgetful”, “I can't organize my feelings” ”,“ No words come out ”, etc. (see FIG. 4 described later). After the determination of the current psychosomatic state, the psychosomatic state measuring apparatus 10 outputs information (hereinafter referred to as “current state specifying information”) for specifying the subject's psychosomatic state to the sound reproducing device 40.

(External input device 20)
Returning to FIG. 1, the external input device 20 is a device that inputs a target psychosomatic state that is a target when the current psychosomatic state of the subject is changed to another psychosomatic state. The external input device 20 can be configured by an input device such as a keyboard. The subject or therapist who uses the mind-body state change system 1 can input the target mind-body state using the external input device 20. Examples of the target mental and physical state of the subject include “I feel well”, “Refreshing mood”, “Improved concentration”, “Smooth mood”, “Prevent blurring”, “Improved memory”, “Improved judgment”, “Fluent talking” (see FIG. 4 described later). After inputting the target psychosomatic state, the external input device 20 outputs information for specifying the target psychosomatic state (hereinafter referred to as “target state specifying information”) to the sound reproducing device 40. The external input device 20 may be configured as an input unit 420 of the sound reproduction device 40 described later.

(Sound source input device 30)
The sound source input device 30 is a device for inputting a stored arbitrary sound source signal to the sound reproducing device 40. The sound source input device 30 can be composed of, for example, a CD or SACD (super audio CD), and the sound source signal stored in the sound source input device 30 includes not only audible sounds but also inaudible sounds for humans. . In the present embodiment, for example, a sound of 20 Hz or less or a sound of 15 kHz or more is referred to as “non-audible sound”.

(Sound reproduction device 40)
The sound reproducing device 40 is a device for generating a non-audible sound for changing a subject's current mind-body state to a target mind-body state and listening to the subject. FIG. 3 is a hardware configuration diagram of the sound reproducing device 40. As shown in FIG. 3, the sound reproducing device 40 physically includes a CPU 41, a main storage device such as a ROM 42 and a RAM 43, an input device 44 such as a keyboard and a mouse, an output device 45 such as a display, and the psychosomatic state measuring device 10. The computer system includes a communication module 46 such as a network card for transmitting / receiving data to / from the external input device 20 and the sound source input device 30, an auxiliary storage device 47 such as a hard disk, and the like. Each function of the sound reproducing device 40 to be described later allows the input device 44, the output device 45, and the communication module 46 to be controlled under the control of the CPU 41 by loading predetermined computer software on the hardware such as the CPU 41, the ROM 42, and the RAM 43. This is realized by operating and reading and writing data in the main storage devices 42 and 43 and the auxiliary storage device 47.

  Returning to FIG. 1, the sound reproduction device 40 functionally includes a parameter storage unit 410 (storage unit), an input unit 420 (current state input unit, target state input unit), a parameter reading unit 430 (parameter reading unit), A non-audible sound control unit 440 (sound source input means, non-audible sound addition means) and an output unit 450 (output means) are configured. Hereinafter, each component of the sound reproducing device 40 will be described in detail.

(Parameter storage unit 410)
The parameter storage unit 410 stores in advance a plurality of psychosomatic state specifying information for specifying a subject's psychosomatic state and a plurality of parameters for specifying the correlation between the plurality of psychosomatic state specifying information. FIG. 4 illustrates an example of psychosomatic state specifying information and parameters stored in the parameter storage unit 410. As shown in FIG. 4, the parameter storage unit 410 includes psychosomatic state specifying information for specifying the subject's psychosomatic state of “not healthy”, and psychosomatic state specifying for specifying the psychosomatic state of the subject of “healthy”. Store information. Further, the parameter storage unit 410 has a parameter name “FM-f-012998” as a parameter for specifying a correlation between the mental and physical state of “not healthy” and the mental and physical state of “good”. A certain parameter is stored.

  In addition, the parameter storage unit 410 includes psychosomatic state specifying information for specifying the psychosomatic state of the subject as “irritated”, psychosomatic state specifying information for specifying the psychosomatic state of the subject as “refreshing”, and “irritated”. The parameter whose parameter name is “FM-f-012999” is stored as a parameter for specifying the correlation between the psychosomatic state of the body and the mind and body state of the “fresh feeling”. Although the explanation is omitted, the same can be said for other mental and physical states of the subject such as “can't concentrate”, “improvement of concentration” and “FM-f-013000”. The parameter storage unit 410 may store the above information for each subject.

  The parameter stored in the parameter storage unit 410 is at least one of a frequency in the non-audible region, an amplitude at the frequency, and a phase at the frequency. In addition, at least one of the frequency in the audible region, the amplitude at the frequency, and the phase at the frequency may be further included in the parameter. Furthermore, the time elapsed since the output unit 450 described later outputs an output signal to the subject may be further included in the parameter.

  That is, the parameter with the parameter name “FM-f-012998” shown in FIG. 4 may point to a specific frequency in the non-audible region, for example, and the parameter with the parameter name “FM-f-012999” may be in the non-audible region, for example. It may refer to a specific frequency and amplitude at that frequency. In addition, the parameter having the parameter name “FM-f-013000” may indicate a frequency in the non-audible region, a phase at the frequency, a frequency in the audible region, and an amplitude at the frequency. In addition, the parameter of the parameter name “FM-f-013001” may indicate the frequency in the non-audible region, the amplitude at the frequency, and the time elapsed since the output unit 450 output the output signal to the subject. Which parameter represents the frequency in the audible region or non-audible region, the amplitude at the frequency, the phase at the frequency, and the elapsed time after the output, for each subject, For each mental and physical state and for each subject's desired mental and physical state. The psychosomatic state of the subject can be actually changed by an output signal generated as described later based on these parameters. An example of actually changing the subject's mind and body state using the output signal will be described later.

(Input unit 420)
Returning to FIG. 1, the input unit 420 receives input of current state specifying information for specifying the current state of mind of the subject from the state of mind measurement device 10 and changes the current state of mind of the subject to another state of mind and body. The external input device 20 accepts input of target state specifying information for specifying a target psychosomatic state as a target. Input unit 420 outputs the received current state specifying information and target state specifying information to parameter reading unit 430.

(Parameter reading unit 430)
When the parameter reading unit 430 receives the current state specifying information and the target state specifying information from the input unit 420, the parameter reading unit 430 refers to the parameter storage unit 410 for a parameter that specifies the correlation between the current state specifying information and the target state specifying information. Read out. For example, the parameter reading unit 430 inputs, as current state specifying information, psychosomatic state specifying information that specifies the subject's mind and body state that “I am not healthy”, and the mind and body that specifies the subject's mind and body state that “I am well” It is assumed that the state specifying information is input as the target state specifying information. In this case, the parameter reading unit 430 refers to the parameter storage unit 410 and reads a parameter whose parameter name is “FM-f-012998” (see FIG. 4). The parameter reading unit 430 outputs the read parameter to the non-audible sound control unit 440.

(Non-audible sound control unit 440)
The non-audible sound control unit 440 generates a non-audible sound to be heard by the subject in order to change the current mind-body state of the subject to the target mind-body state based on the parameters input from the parameter reading unit 430. The non-audible sound control unit 440 generates a non-audible sound having a frequency component in the non-audible region, and then adds the non-audible sound to the sound source signal input from the sound source input device 30 to generate an output signal. The non-audible sound control unit 440 outputs the generated output signal to the output unit 450.

  FIG. 5 is a functional configuration diagram illustrating a functional configuration of the non-audible sound control unit 440. As shown in FIG. 5, the non-audible sound control unit 440 includes a non-audible sound generation unit 441 and a non-audible sound addition unit 442. Hereinafter, each component of the non-audible sound control unit 440 will be described in detail.

(Non-audible sound generator 441)
The non-audible sound generation unit 441 generates a non-audible sound X (t) to be heard by the subject for the purpose of changing the current mind-body state of the subject to the target mind-body state based on the parameters input from the parameter reading unit 430. To do. The non-audible sound generating unit 441 outputs a non-audible sound X (t) generated by a method described later to the non-audible sound adding unit 442. Hereinafter, various methods by which the non-audible sound generation unit 441 generates the non-audible sound X (t) will be described in detail.

(Non-audible sound generation method, part 1: frequency, amplitude, phase)
First, one method for generating a non-audible sound based on the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency will be described. The non-audible sound generation unit 441 uses the following mathematical formula (1).
X (t) = a {1 + sin (2πft−θ)} (1)
Thus, a non-audible sound X (t) having a frequency component of the frequency f in the non-audible region can be generated. However, in Formula (1), f is the frequency which the parameter of the parameter name "FM-f-012998" input from the parameter reading part 430 points out. Further, a is the amplitude indicated by the parameter and represents the amplitude at the frequency f. As the amplitude, for example, sound pressure, sound intensity, power, energy, and the like are used. Θ is a phase indicated by the parameter and represents a phase at the frequency f. T represents time. Note that 0 ≦ θ <2π, f ≦ 20 Hz, and f ≧ 15 kHz.

により、非可聴領域における複数の周波数（ｆ_１、…、ｆ_ｉ、…、ｆ_ｎ）の周波数成分を有する非可聴音Ｘ（ｔ）を生成することができる。ただし、数式（３）において、ｆ_ｉは、パラメータ読出部４３０より入力した例えばパラメータ名「ＦＭ−ｆ−０１２９９８」のパラメータが指す複数の周波数のうちの一つである。また、ａ_ｉは、該パラメータが指す複数の振幅のうちの一つであって、上記周波数ｆ_ｉでの振幅を表す。また、θ_ｉは、該パラメータが指す複数の位相のうちの一つであって、上記周波数ｆ_ｉでの位相を表す。なお、０≦θ_ｉ＜２πであり、ｆ_ｉ≦２０Ｈｚおよびｆ_ｉ≧１５ｋＨｚである。 When the parameter input from the parameter reading unit 430 indicates n multiple frequencies, amplitudes, and phases, the non-audible sound generation unit 441 uses the following formula (3).

Thus, a non-audible sound X (t) having frequency components of a plurality of frequencies (f ₁ ,..., F _i ,..., F _n ) in the non-audible region can be generated. However, in Formula (3), f _i is one of a plurality of frequencies indicated by the parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430, for example. A _i is one of a plurality of amplitudes indicated by the parameter and represents the amplitude at the frequency f _i . Θ _i is one of a plurality of phases indicated by the parameter, and represents a phase at the frequency f _i . Note that 0 ≦ θ _i <2π, f _i ≦ 20 Hz, and f _i ≧ 15 kHz.

(Non-audible sound generation method, Part 2: Frequency)
Next, a method for generating the non-audible sound X (t) based only on the frequency in the non-audible region will be described with reference to FIG. For example, when the parameter with the parameter name “FM-f-012998” input from the parameter reading unit 430 indicates, for example, “arbitrary frequency in the non-audible region”, the non-audible sound generating unit 441 A non-audible sound X (t) having a frequency component of an arbitrary frequency a in the region is generated. FIG. 6A shows an arbitrary frequency a in the non-audible region.

  In addition, when the parameter input from the parameter reading unit 430 indicates, for example, “arbitrary plural frequencies in the non-audible region”, the non-audible sound generation unit 441 selects the plural plural frequencies in the non-audible region. A non-audible sound X (t) having frequency components a, b, and c is generated. FIG. 6B shows a plurality of arbitrary frequencies a, b, and c in the non-audible region.

  In addition, when the parameter input from the parameter reading unit 430 indicates, for example, “a specific frequency A in the non-audible region”, the non-audible sound generation unit 441 has the frequency of the specific frequency A in the non-audible region. A non-audible sound X (t) having a component is generated. FIG. 6C shows a specific frequency A in the non-audible region.

  In addition, when the parameter input from the parameter reading unit 430 indicates, for example, “a plurality of specific frequencies A, B, and C in the non-audible region”, the non-audible sound generation unit 441 performs the processing in the non-audible region. A non-audible sound X (t) having a plurality of specific frequency components A, B, and C is generated. FIG. 6D shows specific frequencies A, B, and C in the non-audible region.

  When the parameter input from the parameter reading unit 430 indicates, for example, “a specific frequency A in the non-audible region and a frequency obtained by adding the specific value α to the specific frequency A”, the non-audible sound The generation unit 441 generates a non-audible sound X (t) having a specific frequency A in the non-audible region and frequency components A + α and A + 2α obtained by adding the specific value α to the specific frequency A. FIG. 6E shows a specific frequency A in the non-audible region and frequencies A + α and A + 2α obtained by adding a specific value α to the specific frequency A.

(Non-audible sound generation method, part 3: amplitude)
Next, a method for generating a non-audible sound based on the amplitude will be described with reference to FIG. For example, when the parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430 indicates, for example, “arbitrary amplitude”, the non-audible sound generation unit 441 has an arbitrary amplitude d. A non-audible sound X (t) is generated. FIG. 7A shows an arbitrary amplitude d and an arbitrary inaudible frequency a.

  In addition, when the parameter input from the parameter reading unit 430 indicates, for example, “specific amplitude D”, the non-audible sound generation unit 441 generates the non-audible sound X (t) having the specific amplitude D. Generate. FIG. 7 (b) shows a specific amplitude D and an arbitrary inaudible frequency a.

  Further, when the parameter input from the parameter reading unit 430 indicates, for example, that “the amplitude is greater than or equal to the specific value E”, the non-audible sound generation unit 441 has the non-audible sound having the amplitude D that is greater than or equal to the specific value E. X (t) is generated. FIG. 7C shows an amplitude D equal to or greater than a specific value E and an arbitrary inaudible frequency a.

  Further, when the parameter input from the parameter reading unit 430 indicates, for example, that “the amplitude is less than or equal to the specific value F”, the non-audible sound generation unit 441 has the non-audible sound having the amplitude D that is less than or equal to the specific value F. X (t) is generated. FIG. 7D shows an amplitude D equal to or less than a specific value F and an arbitrary inaudible frequency a.

  In addition, when the parameter input from the parameter reading unit 430 indicates, for example, “amplitude between the specific value E and another specific value F”, the non-audible sound generation unit 441 sets the specific value E and A non-audible sound X (t) having an amplitude D between other specific values F is generated. FIG. 7E shows an amplitude D between a specific value E and another specific value F, and an arbitrary inaudible frequency a.

(Non-audible sound generation method, part 4: phase)
Next, a method for generating a non-audible sound based on the phase will be described with reference to FIGS. 8 and 9. The parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430 is, for example, “specific frequency A in the non-audible region and specification in the non-audible region where the phase difference from the specific frequency A is R”. ”Frequency B”. In this case, the non-audible sound generation unit 441 has a specific frequency A in the non-audible area and a non-audible sound X having a specific frequency B in the non-audible area having a phase difference R from the specific frequency A. (T) is generated. FIGS. 8A and 8B show a specific frequency A in the non-audible region and a specific frequency B in the non-audible region having a phase difference R from the specific frequency A. FIG.

  Further, the parameter input from the parameter reading unit 430 represents, for example, “a specific frequency A in the audible region and a specific frequency B in the non-audible region where the phase difference from the specific frequency A is R”. Suppose that In this case, the non-audible sound generation unit 441 has a specific frequency A in the audible region and a non-audible sound X (having a frequency component of the specific frequency B in the non-audible region having a phase difference R from the specific frequency A ( t). FIGS. 9A and 9B show a specific frequency A in the audible region and a specific frequency B in the non-audible region where the phase difference R is from the specific frequency A. FIG.

(Non-audible sound generation method, 5: Fluctuation in frequency)
Next, a method for generating a non-audible sound based on frequency fluctuation will be described with reference to FIG. The frequency and amplitude in the non-audible region where the parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430 satisfies, for example, “G = func (H)”, where G is the frequency versus amplitude in the non-audible region , H represents the area of frequency versus amplitude in the audible region, and func represents a predetermined function. In this case, the non-audible sound generation unit 441 firstly selects a specific frequency range A in the non-audible region that satisfies “G = func (H)” and each frequency corresponding to each frequency in the frequency range A. Calculate the amplitude. Then, the non-audible sound generation unit 441 has a frequency component of a specific frequency range A that is a result of the calculation, and a non-audible sound X (t having each amplitude corresponding to each frequency in the frequency range A. ) Is generated. FIG. 10 shows a frequency versus amplitude area G in the non-audible region, a frequency versus amplitude area H in the audible region, and a specific frequency range A that is the result of the calculation. In this case, the frequency-to-amplitude area H in the audible region may be the frequency-to-amplitude area in the audible region of the sound source signal input from the sound source input device 30.

  Hereinafter, other variations for generating a non-audible sound based on fluctuations in frequency will be further described with reference to FIGS. However, the non-audible sound X (t) is calculated after calculating the specific frequency and amplitude in the non-audible region by comparing the relationship between frequency and amplitude in the audible region and the relationship between frequency and amplitude in the non-audible region. Since the generation is common, in the description with reference to FIG. 11 and FIG. 12, only differences from the example in FIG. 10 will be described.

FIG. 11A shows a case where the area of frequency versus amplitude in the audible region is divided into a plurality of partial areas H ₁ ,..., H _n as compared with FIG. In this case, the non-audible sound generation unit 441 generates a specific frequency range A in the non-audible region that satisfies “G = func (H ₁ ,..., H _n )” and each frequency in the frequency range A. Calculate each corresponding amplitude.

FIG. 11B shows a case where the area of frequency versus amplitude in the non-audible region is divided into a plurality of partial areas G ₁ ,..., G _n as compared with FIG. In this case, the non-audible sound generation unit 441 includes a plurality of specific frequency ranges A ₁ in the non-audible region that satisfy “G ₁ = func ₁ (H),..., G _n = func _n (H)”, respectively. ..., a _n, and the plurality of frequency ranges a _1, ..., to calculate the respective amplitude for each frequency in the a _n.

Compared with FIG. 10, FIG. 11 (c) shows that both the area of the frequency vs. amplitude in the audible region and the non-audible region have a plurality of partial areas H ₁ ,..., H _n and G _{1 ,.} The case where it is divided is shown. In this case, the non-audible sound generating unit 441 satisfies “G ₁ = func ₁ (H ₁ ,..., H _n ),..., G _n = func _n (H ₁ ,..., H _n )”. a plurality of specific frequency ranges a ₁ in the audible _{region, ...,} a _n, and the plurality of frequency ranges a _1, ..., to calculate the respective amplitude for each frequency in the a _n.

FIG. 11D shows a case where the area of frequency vs. amplitude in the audible region is one partial area H ₁ compared to FIG. In this case, the non-audible sound generation unit 441 has a specific frequency range A in the non-audible region that satisfies “G = func (H ₁ )”, and each amplitude corresponding to each frequency within the frequency range A. Calculate

FIG. 12A shows a case where the area of frequency vs. amplitude in the non-audible region is one partial area G ₁ compared to FIG. In this case, the non-audible sound generation unit 441 has a specific frequency range A ₁ in the non-audible region that satisfies “G ₁ = func (H)”, and each frequency corresponding to each frequency in the frequency range A ₁ . Calculate the amplitude of.

FIG. 12 (b) shows a case where both the area of the frequency versus the amplitude in the audible region and the non-audible region are one partial area H ₁ and G ₁ compared to FIG. In this case, the non-audible sound generation unit 441 corresponds to a specific frequency range A ₁ in the non-audible region that satisfies “G ₁ = func (H ₁ )” and each frequency in the frequency range A ₁ . Calculate the amplitude of each.

FIG. 12 (c), as compared to FIG. 10, a frequency-to-area one partial area H ₁ of the amplitude in the audible region, and the non-audible frequency pairs in the domain amplitude partial area an area multiple of G _1, ..., shows the case where is divided into _{G n.} In this case, the non-audible sound generation unit 441 includes a plurality of specific frequency ranges A in the non-audible region that respectively satisfy “G ₁ = func ₁ (H ₁ ),..., G _n = func _n (H ₁ )”. _{1, ...,} a _n, and the plurality of frequency ranges a _1, ..., to calculate the respective amplitude for each frequency in the a _n.

Compared with FIG. 10, FIG. 12D shows that the area of frequency versus amplitude in the audible region is divided into a plurality of partial areas H ₁ ,..., H _n and the area of frequency versus amplitude in the non-audible region. There shows a case where one of the partial area G _1. In this case, the non-audible sound generating unit 441, _{"G 1 = func (H 1,} ..., H n) " particular in the non-audible range to satisfy the frequency range _{A 1,} and in the frequency range _A within ₁ Each amplitude corresponding to each frequency is calculated.

In the above, the method which considered the area of frequency versus amplitude in both the audible region and the non-audible region has been described with reference to FIGS. In the following, a method will be described with reference to FIG. 13 in which the area of frequency vs. amplitude is considered in the audible area, but the area of frequency vs. amplitude is not considered in the non-audible area. For example, the parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430 has an amplitude determined by, for example, “D ₁ = func (H), and a frequency in a non-audible region corresponding to the amplitude, where H is audible It is assumed that the area of frequency versus amplitude in a region, func represents a predetermined function. In this case, the non-audible sound generation unit 441 calculates a specific amplitude D ₁ that satisfies “D ₁ = func (H)” and a specific frequency A ₁ in the non-audible region corresponding to the amplitude D _1. . Then, the non-audible sound generation unit 441 has a specific amplitude D ₁ which is a result of the calculation, and a non-audible sound having a specific frequency component A ₁ in the non-audible region corresponding to the amplitude D _1. X (t) is generated. 13 (a) shows a frequency versus amplitude area _H in the audible range, D 1 = func particular amplitude _D to satisfy the (H) _1, and the amplitude _D specific frequency _{A 1} in the inaudible region corresponding to the ₁ Is shown.

FIG. 13B shows a case where the area of frequency vs. amplitude in the audible region is divided into a plurality of partial areas H ₁ ,..., H _n as compared with FIG. In this case, the non-audible sound generation unit 441 performs a specific amplitude D ₁ that satisfies “D ₁ = func (H ₁ ,..., H _n )” and a specific amplitude in the non-audible region corresponding to the amplitude D ₁ . to calculate the frequency _{a 1.}

FIG. 13C shows a case where a plurality of specific amplitudes satisfying “amplitude = func (H)” are obtained as compared with FIG. In this case, the non-audible sound generation unit 441 includes a plurality of specific amplitudes D ₁ ,..., D _n that satisfy “D ₁ = func ₁ (H),..., D _n = func _n (H)”, and the plurality of amplitude _D 1, ..., a specific frequency _a 1 in the inaudible region corresponding to each of the _{D n,} ..., calculating the _{a n.}

FIG. 13D shows a case where the case of FIG. 13B and the case of FIG. 13C overlap as compared to FIG. In this case, the non-audible sound generation unit 441 performs a specific operation satisfying “D ₁ = func ₁ (H ₁ ,..., H _n ),..., D _n = func _n (H ₁ ,..., H _n )”. a plurality of amplitude _D 1, ..., _{D n,} and the plurality of amplitude _D 1, ..., a specific frequency _a 1 in the inaudible region corresponding to each of the _{D n,} ..., calculating the _{a n.}

Figure 13 (e), as compared in FIG. 13 (a), it shows a case where the area of the frequency versus amplitude in the audible region is one of the partial area H _1. In this case, the non-audible sound generation unit 441 calculates a specific amplitude D ₁ that satisfies “D ₁ = func (H ₁ )”, and a specific frequency A ₁ in the non-audible region corresponding to the amplitude D _1. To do.

FIG. 13F shows a case where the case of FIG. 13C and the case of FIG. 13E overlap as compared with FIG. In this case, the non-audible sound generation unit 441 has a plurality of specific amplitudes D ₁ ,..., D _n that satisfy “D ₁ = func ₁ (H ₁ ),..., D _n = func _n (H ₁ )”. , and the plurality of amplitude _D 1, ..., a specific frequency _a 1 in the inaudible region corresponding to each of the _{D n,} ..., calculating the _{a n.}

Hereinafter, a method will be described with reference to FIG. 14 in which the area of frequency vs. amplitude is considered in the non-audible area but the area of frequency vs. amplitude is not considered in the audible area. The frequency and amplitude in the non-audible region where the parameter of the parameter name “FM-f-012998” input from the parameter reading unit 430 satisfies, for example, “G = func (E ₁ )”, where G is a frequency pair in the non-audible region It is assumed that the amplitude area, E ₁ represents a specific amplitude corresponding to a specific frequency a in the audible region, and func represents a predetermined function. In this case, the non-audible sound generation unit 441 calculates a specific frequency range A in the non-audible region that satisfies “G = func (E ₁ )” and each amplitude corresponding to each frequency in the frequency range A. calculate. Then, the non-audible sound generation unit 441 has each frequency component in a specific frequency range A that is a result of the calculation, and has a respective amplitude corresponding to each frequency in the frequency range A. (T) is generated. FIG. 14A shows a specific amplitude E _{1 in} the audible region, an area G of frequency versus amplitude in the non-audible region, and a specific frequency range A that is the calculation result.

In the following, while considering the area of frequency vs. amplitude in the non-audible region, other variations of the method not considering the area of frequency vs. amplitude in the audible region will be described with reference to FIGS. Further explanation will be given. However, only differences from the example of FIG. 14A will be described. FIG. 14B shows a case where there are a plurality of specific frequencies and amplitudes in the audible region to be considered, as compared with FIG. In this case, the non-audible sound generation unit 441 corresponds to a specific frequency range A in the non-audible region that satisfies “G = func (E ₁ ,..., E _n )” and each frequency in the frequency range A. Calculate the amplitude of each.

FIG. 14C shows a case where the area of frequency versus amplitude in the non-audible region is divided into a plurality of partial areas G ₁ ,..., G _n as compared to FIG. In this case, the non-audible sound generation unit 441 includes a plurality of specific frequency ranges A ₁ in the non-audible region that satisfies “G ₁ = func ₁ (E ₁ ),..., G _n = func _n (E ₁ )”. _, ..., a n, and the plurality of frequency ranges a _1, ..., to calculate the respective amplitude for each frequency in the a _n.

FIG. 14D shows a case where the case of FIG. 14B and the case of FIG. 14C overlap as compared with FIG. In this case, the non-audible sound generation unit 441 satisfies “G ₁ = func ₁ (E ₁ ,..., E _n ),..., G _n = func _n (E ₁ ,..., E _n )”. a plurality of specific frequency ranges a ₁ in the _{area, ...,} a _n, and the plurality of frequency ranges a _1, ..., to calculate the respective amplitude for each frequency in the a _n.

FIG. 14 (e) than in FIG. 14 (a), shows a case where the area of the frequency versus amplitude in the non-audible range is one of the partial area G _1. In this case, the non-audible sound generation unit 441 has a specific frequency range A ₁ in the non-audible region that satisfies “G ₁ = func (E ₁ )” and each frequency corresponding to each frequency in the frequency range A ₁ . Calculate the amplitude of.

FIG. 14 (f) shows a case where the case of FIG. 14 (b) and the case of FIG. 14 (e) overlap with each other as compared with FIG. 14 (a). In this case, the non-audible sound generation unit 441 includes the specific frequency range A ₁ in the non-audible region that satisfies “G ₁ = func (E ₁ ,..., E _n )”, and each frequency range in the frequency range A ₁ . Each amplitude corresponding to the frequency is calculated.

In the following, a method that does not consider both the frequency versus amplitude area in the audible region and the frequency versus amplitude area in the non-audible region will be described with reference to FIG. Parameter reading unit 430 for example parameter name input from the "FM-f-012998" parameters, for example, _{"D 1} = func _(E 1) specific to satisfy the amplitude _{D 1,} and the specific non-corresponding to the amplitude _{D 1} A specific frequency A _{1 in} the audible region, where E ₁ represents a specific amplitude corresponding to the specific frequency a ₁ in the audible region, and func represents a predetermined function. In this case, the non-audible sound generating unit 441, _{"D 1} = func _(E 1) 'specific to satisfy the amplitude _{D 1,} and the specific specific frequency _{A 1} in the inaudible region corresponding to the amplitude _{D 1} Calculate Then, the non-audible sound generation unit 441 has a specific amplitude D ₁ that is a result of the calculation, and a non-audible sound component that has a frequency component of a specific frequency A ₁ in the non-audible region corresponding to the specific amplitude D _1. An audible sound X (t) is generated. FIG. 15A shows a specific amplitude E ₁ corresponding to a specific frequency a ₁ in the audible region, and a specific amplitude D ₁ and a specific frequency A ₁ which are calculation results.

In the following, other variations of the method that do not consider both the frequency vs. amplitude area in the audible region and the frequency vs. amplitude area in the non-audible region will be further described with reference to FIGS. 15 (b) to 15 (d). explain. However, only differences from the example of FIG. 15A will be described. FIG. 15B shows a case where there are a plurality of specific frequencies and amplitudes in the audible region to be considered, as compared to FIG. In this case, the non-audible sound generation unit 441 has a specific amplitude D ₁ that satisfies “D ₁ = func (E ₁ ,..., E _n )” and a non-audible region corresponding to the specific amplitude D ₁ . calculating a specific frequency _{a 1.}

FIG. 15C shows a case where there are a plurality of specific amplitudes and frequencies to be calculated as compared to FIG. In this case, the non-audible sound generation unit 441 has a plurality of specific amplitudes D ₁ ,..., D _n that satisfy “D ₁ = func ₁ (E ₁ ),..., D _n = func _n (E ₁ )”. and the specific plurality of amplitude D _{1,, ...,} a plurality of specific frequencies in the inaudible region corresponding to the respective D _n a _{1, ...,} calculating the a _n.

FIG. 15D shows a case where the case of FIG. 15B and the case of FIG. 15C overlap as compared to FIG. In this case, the non-audible sound generation unit 441 performs a specific operation that satisfies “D ₁ = func ₁ (E ₁ ,..., E _n ),..., D _n = func _n (E ₁ ,..., E _n )”. a plurality of amplitude _D 1, ..., _{D n,} and the specific plurality of amplitude _D 1, ..., _{D n} specific plurality of frequencies _a 1 in the non-audible range corresponding to each, ..., calculating the _{a n.}

(Non-audible sound generation method, Part 6: Time fluctuation)
Next, a method for generating a non-audible sound based on temporal fluctuation will be described with reference to FIG. For example, a parameter having a parameter name “FM-f-012998” input from the parameter reading unit 430 satisfies a specific plurality of amplitudes D satisfying, for example, “D ₁ = func (t ₁ ),..., D _n = func (t _n )” _1, ..., _{D n,} and the specific plurality of amplitude _D 1, ..., a specific frequency _{a 1} in the inaudible region corresponding to _{D n, however, t 1, ...,} t _n is the output section 450 output signal It is assumed that “func is a predetermined function”, the time that has elapsed since the output to the subject. In this case, the non-audible sound generation unit 441 firstly has a plurality of specific amplitudes D ₁ ,..., D _n that satisfy “D ₁ = func (t ₁ ),..., D _n = func (t _n )”. , And a specific frequency A ₁ in the non-audible region corresponding to the specific plurality of amplitudes D ₁ ,..., D _n . Then, the non-audible sound generating unit 441, a plurality of amplitude D ₁ specific is the result of the _calculation, ... has a D _n, and the specific plurality of amplitude D _1, ..., a non-corresponding to D _n generating a non-audible sound X (t) having a specific frequency component of the frequency a ₁ in the audible region. FIG. 16 (a), the time _t 1, ..., amplitude _D 1 of the at _{t n,} ..., _{D n,} a plurality of amplitude _D 1, ..., indicate the specific frequency _{A 1} in the inaudible region corresponding to _{D n} ing. Note that the non-audible sound generation unit 441 inputs information related to the elapsed time t by feeding it back from the output unit 450.

  In the following, another variation for generating a non-audible sound based on temporal fluctuation will be further described with reference to FIGS. 16 (b) and 16 (c). However, since it is common to generate the non-audible sound X (t) after calculating the frequency and amplitude in the non-audible region that varies with the elapsed time t, it differs from the example of FIG. Only will be described.

FIG. 16B shows a case where it is not the amplitude but the frequency that changes with the elapsed time t, as compared with FIG. In this case, the non-audible sound generation unit 441 includes a plurality of specific frequencies A ₁ ,..., A _n that satisfy “A ₁ = func (t ₁ ),..., A _n = func (t _n )”, and the specific plurality of frequencies a _1, ..., calculates the particular amplitude D corresponding to a _n.

FIG. 16C shows a case where the case of FIG. 16A and the case of FIG. 16B overlap. In this case, the non-audible sound generation unit 441 includes a plurality of specific amplitudes D ₁ ,..., D _n that satisfy “D ₁ = funcD (t ₁ ),..., D _n = funcD (t _n )”, and _{"a 1 = funcA (t 1)} , ..., a n = funcA (t n) " frequency _a 1 more particular to satisfy, ..., calculating the _{a n.} Note that funcD and funcA are predetermined functions.

  Heretofore, various methods for generating the non-audible sound X (t) by the non-audible sound generation unit 441 have been described. The non-audible sound generating unit 441 outputs the non-audible sound X (t) generated by the above method to the non-audible sound adding unit 442.

(Non-audible sound adding unit 442)
Next, the non-audible sound adding unit 442 will be described with reference to FIG. The non-audible sound adding unit 442 generates the output signal Y (t) by adding the non-audible sound X (t) input from the non-audible sound generating unit 441 to the sound source signal input from the sound source input device 30. Is. The non-audible sound adding unit 442 outputs the generated output signal Y (t) to the output unit 450. Hereinafter, the operation of the non-audible sound adding unit 442 will be described in detail.

(Operation of non-audible sound adding unit 442, part 1)
When the non-audible sound generation unit 441 generates the non-audible sound X (t) by the above-described “non-audible sound generation method, 1”, the non-audible sound addition unit 442 uses the following formula (2).
Y (t) = X (t) s (t) (2)
Thus, an output signal Y (t) is generated. In Equation (2), s (t) represents a signal obtained by oversampling the sound source signal input from the sound source input device 30 (hereinafter referred to as “oversampling signal”). The non-audible sound adding unit 442 outputs the output signal Y (t) thus generated to the output unit 450.

  In order to perform the above operation, the non-audible sound adding unit 442 may further include, for example, an oversampling unit (not shown). The oversampling unit oversamples the sound source signal from the sound source input device 30 at a frequency that is at least twice the frequency of the high frequency component of the non-audible sound X (t) generated by the non-audible sound generation unit 441.

(Operation of non-audible sound adding unit 442, part 2)
When the non-audible sound generation unit 441 generates the non-audible sound X (t) by the above-described “non-audible sound generation method, part 2” to “non-audible sound generation method, part 6”, the non-audible sound addition unit 442 Generates an output signal Y (t) by an “addition method” or “inverse Fourier transform method” described later.

The addition method is the following formula (4) or formula (5).
Y (t) = A (t) + s (t) (4)
Y (t) = A (t) + B (t) (5)
Thus, the output signal Y (t) is generated. However, in the above formulas (4) and (5), A (t) is a non-audible sound obtained by performing an inverse Fourier transform on only the non-audible region in any one of the frequency spectra of FIGS. It is. It should be noted that A (t) extracts only inaudible sound from the signal obtained by performing inverse Fourier transform on the entire frequency region in any one of the frequency spectra of FIGS. 6 to 16 using a high-pass filter or a low-pass filter. The obtained non-audible sound may be used. This non-audible sound A (t) is obtained by a method of removing an audible sound by filtering. Further, s (t) is the above oversampling signal. B (t) is a frequency component (exceeding 20 Hz and less than 15 kHz) in the audible region of s (t).

  In the inverse Fourier transform method, for example, Y (Δt) is obtained by performing inverse Fourier transform on the entire frequency region in any of the frequency spectrums of FIGS. 6 to 16 described above, and the output is obtained by connecting these Y (Δt). This is a method for obtaining the signal Y (t). In this inverse Fourier transform method, the entire frequency band is subjected to inverse Fourier transform, so that the output signal Y (t) can be obtained at one time without going through the generation of the non-audible sound A (t) in the above addition method. it can.

  Heretofore, each component of the non-audible sound control unit 440 has been described. FIG. 17 is a diagram illustrating each signal in the non-audible sound control unit 440. FIG. 17A illustrates the sound source signal input from the sound source input device 30 by the non-audible sound control unit 440. FIG. 17B illustrates the inaudible sound X (t) generated by the inaudible sound generation unit 441. FIG. 17C illustrates the output signal Y (t) generated by the non-audible sound adding unit 442. As shown in FIG. 17, the frequency component of the output signal Y (t) has no relation to the frequency component of the sound source signal, and changes depending on the frequency component of the non-audible sound X (t) to be added. It is.

(Output unit 450)
Returning to FIG. 1, the output unit 450 provides the subject with the output signal Y (t) input by the non-audible sound control unit 440 as sound. The output unit 450 feeds back to the non-audible sound control unit 440 information indicating the time t that has elapsed since the output of the output signal Y (t) was started.

  When outputting the output signal Y (t), the output unit 450 amplifies the frequency component in the non-audible region among the frequency components of the output signal Y (t) by a predetermined multiple, and then outputs the output signal Y (t) to the subject. Output to. Specifically, the output unit 450 first outputs the output signal Y (t) input by the non-audible sound control unit 440 to the frequency component (over 20 Hz and less than 15 kHz) L (t) in the audible region and the frequency in the non-audible region. It is divided into components (20 Hz or less, or 15 kHz or more) H (t). Next, the output unit 450 outputs L (t) + eH (t) or s (t) + gH (t) as an output signal Y (t) to the subject. Here, e and g represent a predetermined multiple, and s (t) is the above oversampling signal.

  A method of amplifying the frequency component in the non-audible region among the frequency components of the output signal Y (t) by a predetermined multiple and then outputting the output signal Y (t) to the subject is a device for separating frequencies (channel divider). Or the like), and a method of amplifying only the output of the non-audible area by an amplifier (amplifier or the like) may be employed.

The output unit 450 outputs an output signal Y (t) to the subject in accordance with a predetermined exposure frequency, exposure time, or exposure time (exposure time zone). Here, the “predetermined exposure frequency” refers to, for example, “twice a day”, “total of 5 times or less in 2 days”, “total of 6 to 10 times in 5 days”, and the like. The “predetermined exposure time” is, for example, “3 minutes at a time”, “3 minutes or more at a time”, “3 minutes to 10 minutes at a time”, “10 minutes at 3 times”, “3 times 10 minutes or more”, “3 times 10 minutes or more and 20 minutes or less”, “2 days 10 minutes”, “2 days 10 minutes or more”, “2 days 10 minutes or more 20 minutes or less”, etc. Say. Further, the “predetermined exposure time (exposure time zone)” is, for example, “a single time zone, for example, 14:50 to 15:20”,
“A plurality of time zones, for example, 10:20 to 10:30, 14:50 to 15:00, 18:00 to 18:10”, and the like.

(Example)
In the following, with respect to an embodiment in which the psychosomatic state of the subject is actually changed using the output signal generated by the above-described method based on the parameters as shown in FIG. 4 (for example, “FM-f-012999” or the like). explain. In the present example, the same sound source signal in which the intensity of the high frequency component was changed was presented as output signals to seven subjects, and then the brain waves of each subject were measured. Then, by measuring the ratio of the alpha wave in the electroencephalogram, it was confirmed that the subject's psychosomatic state was changed from “Irritation (Tension)” to “Refreshing (Relax)”. As described in Reference Documents 1 and 2 below, alpha waves appear when relaxing. In other words, the appearance rate (intensity) of alpha waves decreases in a tension state, and the appearance rate (intensity) of alpha waves increases in a relaxed state. In this example, for the convenience of the experiment, the audible range was set to 0 to 22 kHz, and the non-audible range was set to 22 kHz to 96 kHz. Hereinafter, specific conditions and the like in the present embodiment will be described in detail.
<Reference 1> John Pinel (Author), Takashi Sato, Ryo Izumi, Koichi Wakabayashi, Nozomi Asukai (Translation), Pinel Biopsychology-Neuroscience of the Brain, Mind and Behavior, Nishimura Shoten, 2005
<Reference 2> Rei Inoue, Shigeru Akazawa (Author), Clinical EEG: Interpretation of Reading, Minamiyamado, 1986

As stimuli presented to the subjects, orchestra music (“Symphonic Paradise”, presentation period: 120 s) was presented four times per condition under the following three conditions (conditions 1 to 3). The audible range is the same under three conditions, and the sound pressure level is adjusted to be about 80 to 90 dB (A). On the other hand, the ratio occupied by frequency components of 22 kHz or higher in the following refers to the ratio occupied by frequency components of 22 kHz to 96 kHz on 0 to 96 kHz of the power spectrum.
(1) Condition 1
Conditions without inaudible sound: Frequency components of 22 kHz or higher were excluded from the original stimulus (orchestra music) and presented to the subject as sound equivalent to CD or television sound.
(2) Condition 2
Condition in non-audible sound: The original stimulus (orchestra music) was adjusted so that the ratio of frequency components of 22 kHz or higher was 0.03%, and then presented to the subject. This adjustment is appropriately performed in consideration of the characteristics of the equipment and the balance between the audible range and the non-audible range.
(3) Condition 3
Non-audible sound level condition: The original stimulus (orchestra music) was amplified so that the ratio of frequency components of 22 kHz or higher was 0.76%, and then presented to the subject. This amplification increases the intensity of the non-audible sound by about 25 times compared to the above condition 2 (amplitude is about 4 to 5 times).

  FIG. 18 is a diagram showing the stimulus (music) presented to the subject in this example. In FIG. 18, a graph G1 shows the power spectrum of the presented stimulus in the condition 1 with no non-audible sound, a graph G2 shows the power spectrum of the presented stimulus in the condition in the condition 2 non-audible sound, and a graph G3 shows the condition. The power spectrum of the presentation stimulus in the condition of 3 non-audible sound volume is shown, and the graph G4 shows the power spectrum of the background noise for comparison. Here, dB is a relative value when the maximum value that can be recorded during recording of the sound source is 0 dB. By the way, the recording conditions are the same for each stimulus.

Under the above conditions, stimulation (music) was presented to seven subjects, and the brain waves of each subject were analyzed. As the analysis section, the latter half (60 to 120 s) of the music presented to the subject was the subject of analysis. This is due to a report that there is a time difference in the effects of non-audible sounds (see Reference 3 below). Regarding the electroencephalogram, the ratio of alpha waves (8 to 13 Hz) occupying 8 to 30 Hz was noted, and the average value for each subject was compared under each condition. Specifically, a t-test with correspondence between non-audible sound and non-audible sound, non-audible sound and non-audible sound volume, non-audible sound and non-audible sound volume is performed, and the probability value there Is less than 5% significance level (1.67%) corrected by Bonferroni's method, it was decided that there was a significant difference, that is, there was a difference between the two.
<Reference 3> Oohashi T, Nishina E, Honda M, Yonekura Y, Fuwamoto Y, Kawai N, Maekawa T, Nakamura S, Fukuyama H, Shibasaki H. Inaudible high-frequency sounds affect brain activity: hypersonic effect, JNeurophysiol, 2000 Jun , 83 (6), 3548-3558

  FIG. 19 shows the results of this experiment. In FIG. 19, the horizontal axis indicates the condition for presenting a non-audible sound. “None” corresponds to the above condition 1, “Medium” corresponds to the above condition 2 and “Large”. Corresponds to condition 3 above. The vertical axis indicates the average ratio of alpha waves. In FIG. 19, the average ratio of the alpha waves of seven subjects is displayed with seven triangles (Δ) for condition 1, seven circles (◯) for condition 2, and seven for condition 3. It is displayed with a square (□). However, the display of each triangle, circle, and square shows the average value for four measurements.

  As a result of the experiment in this example, as shown in FIG. 19, a significant difference in the average ratio of alpha waves was confirmed between the condition during non-audible sound and the condition without non-audible sound. That is, as long as Condition 2 and Condition 1 are compared, Condition 2 changes the subject's mind-body state from the current mind-body state of “Irritation (Tension)” to the target mind-body state of “Refreshing (Relaxed)” It can be said that it was able to change it well. Alternatively, assuming that the subject's psychosomatic state does not change under the condition where there is no non-audible sound, the psychosomatic state of the subject is “irritated (tensioned)” under the condition 2 during the non-audible sound. It can be said that it was possible to change to the target mental and physical state of "refreshing feeling (relaxed state)".

  Further, as a result of the experiment in this example, as shown in FIG. 19, a significant difference could not be confirmed between the condition of non-audible sound level and the condition of no non-audible sound. In FIG. 19, “ns” indicates that there is no significant difference. In other words, from this, simply applying a non-audible sound does not change the subject's mind-body state, but what is the subject's current mind-body state and what is the target mind-body state It can be seen that appropriate parameters should be used depending on the situation. For example, as can be seen from the results of this embodiment, when changing from the current mind-body state of “Irritation (Tension)” to the target mind-body state of “Refreshing (Relaxed)”, As in condition 2, it is desirable to adjust the intensity of the non-audible sound so that the ratio of frequency components of 22 kHz or higher is 0.03%.

(Operation and effect of the psychosomatic state change system 1)
Then, the effect | action and effect of the mind-and-body state change system 1 concerning this embodiment are demonstrated. According to the psychosomatic state change system 1 of the present embodiment, the output signal Y (t) provided to the subject is obtained by adding a non-audible sound X (t) to an arbitrary sound source signal. That is, the frequency component of the output signal Y (t) has no relation to the frequency component of the sound source signal, and changes depending on the frequency component of the non-audible sound X (t) to be added. Therefore, according to the present embodiment, it is possible to output the output signal Y (t) having a frequency component that does not depend on the frequency component of the sound source signal. Further, since the output signal Y (t) does not depend on the sound source signal, the parameter storage unit 410 does not need to accumulate different sound source signals for each subject's mind and body condition, for example. For this reason, it is possible to prevent the storage capacity necessary for configuring the parameter storage unit 410 from increasing.

  Further, the non-audible sound X (t) is generated based on the parameters stored in the parameter storage unit 410. Since this parameter represents a correlation between a plurality of psychosomatic states of the subject, the parameter reading unit 430 appropriately selects a parameter corresponding to the correlation between the current psychosomatic state of the subject and the target psychosomatic state. By outputting to the non-audible sound control unit 440, the non-audible sound control unit 440 can generate an appropriate non-audible sound X (t) for changing the current mind-body state of the subject to the target mind-body state. . Then, by providing the subject with the inaudible sound X (t) together with the sound source signal, providing the subject with an appropriate relaxation therapy for changing the subject's current mind-body state to the target mind-body state. it can. An example of actually changing the subject's mind and body state using the output signal provided to the subject is as described in the above (Example).

  In this embodiment, the non-audible sound control unit 440 uses the current mind and body of the subject by using at least one parameter among the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency. An appropriate non-audible sound X (t) for changing the state to the target psychosomatic state can be generated.

  In the present embodiment, the non-audible sound control unit 440 uses the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency as parameters in the above formulas (1) to (3). Thus, it is possible to generate an appropriate non-audible sound X (t) and an output signal Y (t) for changing the current psychosomatic state of the subject to the target psychosomatic state.

  In the present embodiment, the non-audible sound control unit 440 further uses at least one parameter among the frequency in the audible region, the amplitude at the frequency, and the phase at the frequency, so that the non-audible sound control unit 440 performs the current mind and body of the subject. An appropriate non-audible sound X (t) for changing the state to the target psychosomatic state can be generated. By using parameters related to the audible sound when generating the non-audible sound X (t), the non-audible sound control unit 440 can generate the non-audible sound X (t) reflecting the fluctuation in frequency.

  Moreover, in this embodiment, the non-audible sound control unit 440 uses the current mind and body of the subject by using the time t that has elapsed since the output unit 450 outputs the output signal Y (t) to the subject. An appropriate non-audible sound X (t) for changing the state to the target psychosomatic state can be generated. By using a parameter related to the output signal Y (t) that has already been output when the non-audible sound X (t) is generated, the non-audible sound control unit 440 reflects the fluctuation over time and the non-audible sound X (t). Can be generated.

  Further, in the present embodiment, the output unit 450 amplifies the frequency component in the non-audible region among the frequency components of the output signal Y (t), so that the entire output signal Y (t) is in the non-audible region. The ratio of frequency components can be increased.

  Further, in the present embodiment, the output unit 450 outputs the output signal Y (t) to the subject in accordance with a predetermined exposure frequency, exposure time, or exposure time, so that the current mind-body state of the subject is the target mind-body. An optimal output signal Y (t) for changing to a state can be provided to the subject.

1 is a schematic configuration diagram of a mind-body state change system 1. FIG. It is a figure which shows an example of the parameter | index used when the psychosomatic state measurement apparatus 10 measures the test subject's present mind-body state, and an example of the measuring method of the said parameter | index. 2 is a hardware configuration diagram of a sound reproduction device 40. FIG. An example of psychosomatic state specifying information and parameters stored in the parameter storage unit 410 is imagined. 3 is a functional configuration diagram illustrating a functional configuration of a non-audible sound control unit 440. FIG. It is a figure for demonstrating the method in which the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based only on the frequency in a non-audible area | region. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on an amplitude. It is a figure for demonstrating the method in which the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on a phase. It is a figure for demonstrating the method in which the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on a phase. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation | variation on a frequency. It is a figure for demonstrating the method the non-audible sound production | generation part 441 produces | generates the non-audible sound X (t) based on the fluctuation over time. It is the figure which imaged each signal in the non-audible sound control part 440. FIG. It is a figure which shows the irritation | stimulation (music) presented to the test subject in the Example. It is a figure which shows the result of the experiment in an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Psychosomatic state change system, 10 ... Psychosomatic state measuring device, 20 ... External input device, 30 ... Sound source input device, 40 ... Sound reproduction device, 410 ... Parameter storage part, 420 ... Input part, 430 ... Parameter reading part, 440 ... non-audible sound control unit, 441 ... non-audible sound generation unit, 442 ... non-audible sound addition unit, 443 ... multiplication unit, 450 ... output unit.

Claims (9)

Storage means for preliminarily storing a plurality of psychosomatic state specifying information for specifying a subject's psychosomatic state, and a plurality of parameters for specifying the correlation of each of the plurality of psychosomatic state specifying information;
Current state input means for accepting input of current state specifying information for specifying the current psychosomatic state of the subject;
Target state input means for receiving input of target state specifying information for specifying a target psychosomatic state as a target when changing the current psychosomatic state of the subject to another psychosomatic state of the subject;
A parameter reading unit that reads a parameter for specifying a correlation between the current state specifying information received by the current state input unit and the target state specifying information received by the target state input unit with reference to the storage unit;
Sound source input means for receiving input of an arbitrary sound source signal;
A non-audible sound to be heard by the subject to change the current psychosomatic state of the subject to the target psychosomatic state of the subject is generated based on the parameter read by the parameter reading unit, and the generated non-permitted sound is generated. Non-audible sound adding means for generating an output signal by adding listening sound to the sound source signal received by the sound source input means;
Output means for outputting the output signal generated by the non-audible sound adding means to the subject;
A sound reproducing device comprising:   The sound reproducing device according to claim 1, wherein the parameter is at least one of a frequency in a non-audible region, an amplitude at the frequency, and a phase at the frequency. The non-audible sound adding means is
When the parameter read by the parameter reading means indicates the frequency in the non-audible region, the amplitude at the frequency, and the phase at the frequency, the following formula (1)
X (t) = a {1 + sin (2πft−θ)} (1)
To generate the inaudible sound X (t),
The following mathematical formula (2)
Y (t) = X (t) s (t) (2)
(Where f represents the frequency, a represents the amplitude at the frequency f, θ represents the phase at the frequency f, s (t) represents the sound source signal, and t represents time. )
The sound reproduction apparatus according to claim 2, wherein the output signal Y (t) is generated by multiplying the non-audible sound X (t) and the sound source signal s (t). The non-audible sound adding means is
When the parameter read out by the parameter reading means indicates a plurality of n frequencies, amplitudes and phases, the following mathematical formula (3)

(Where f _i represents one of the plurality of frequencies, a _i represents the amplitude at the frequency f _i , and θ _i represents the phase at the frequency f _i ).
The sound reproduction apparatus according to claim 3, wherein the non-audible sound X (t) is generated by the following.   The sound reproduction device according to claim 2, wherein the parameter further includes at least one of a frequency in an audible region, an amplitude at the frequency, and a phase at the frequency.   The sound reproducing apparatus according to claim 2, wherein the parameter further includes a time elapsed after the output means outputs the output signal to the subject. The non-audible sound adding means is
The sound reproduction device according to claim 5 or 6, wherein the output signal is generated by adding the generated non-audible sound and a sound source signal input from the sound source input means.   The output means outputs the output signal to the subject after amplifying the frequency component in the non-audible region among the frequency components of the output signal. The sound reproducing device according to item.   The sound reproduction apparatus according to claim 1, wherein the output unit outputs the output signal to the subject at a predetermined output frequency, output time, or output time.

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