JP2005338528A - Sound field simulation device, control method thereof, control program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To specify spatial power distribution and time variation of sound wave which is near to the sound to be actually reproduced. <P>SOLUTION: A sound wave simulation device for simulating a propagation state of a sound wave emitted from a sound source located in an acoustic space comprises an input wave generation part 13 for generating a waveform data to be entered to the sound source as a prescribed period portion of the sound wave, and a calculation result output part 19 which calculates the power distribution of the of thr acoustic space at the timing of a prescribed calculation based on the data for predicting the acoustic field in the waveform data and the acoustic space, generates an image data presenting the power distribution of the acoustic space at each timing of calculation based on the result of calculation by this calculation means, and generates a moving image data presenting the propagation state of the sound wave for the prescribed period based on each image data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sound field simulation apparatus that simulates the state of propagation of sound waves from a sound source, a control method for the sound field simulation apparatus, a control program, and a recording medium.

  2. Description of the Related Art Conventionally, a sound field simulation apparatus that simulates the propagation state of sound waves from a sound source by calculation (see, for example, Patent Document 1). As a method for simulating the state of propagation of sound waves, for example, geometric acoustic analysis such as acoustic ray method and virtual image method and numerical acoustic analysis such as finite element method and boundary element method are known. .

More specifically, the calculation result when a stationary sine wave is emitted from the sound source is represented as a power distribution diagram corresponding to the frequency of the sine wave on the sound receiving surface, and the impulse sound wave is emitted from the sound source. The calculation result is expressed as an impulse response waveform at a predetermined sound receiving point.
JP-A-5-73082

  However, when calculating the power distribution diagram of the sine wave on the sound receiving surface, it is a calculation when a sound wave of a steady sine wave is radiated from the sound source, so when an image is displayed based on this calculation result, a single Although the frequency power distribution diagram can be seen, the power distribution of the actual sound wave having the frequency band could not be seen. Further, when obtaining the waveform of the impulse response at a predetermined sound receiving point, the frequency band is wide, but other sound receiving points are not known, and the spatial distribution of sound waves cannot be seen as an image. Furthermore, none of the calculation results can see a transient sound field as a video, and the user cannot visually know the temporal change in the spatial distribution of the sound power close to the sound that is actually played back. It was.

  Therefore, the object of the present invention is to solve the problems of the conventional techniques described above, and a sound field simulation device that can know the spatial power distribution and its temporal change for sound waves close to the sound that is actually reproduced, It is an object to provide a control method, a control program, and a recording medium for a sound field simulation apparatus.

  In order to solve the above problems, the present invention provides a sound field simulation apparatus that simulates a propagation state of a sound wave emitted from a sound source arranged in an acoustic space, and a waveform input to the sound source as a predetermined period of the sound wave. Waveform generation means for generating data, calculation means for calculating a power distribution of the acoustic space at a predetermined calculation timing based on the waveform data and data for predicting a sound field in the acoustic space, and the calculation Based on the calculation result by the means, image data indicating the power distribution of the acoustic space is generated at each calculation timing, and moving image data indicating the propagation state of the sound wave for the predetermined period is generated based on each image data. And moving image generation means.

  Further, in a sound field simulation apparatus that simulates a propagation state of a sound wave radiated from a sound source arranged in an acoustic space, a waveform generation unit that generates waveform data to be input to the sound source as a predetermined period of the sound wave; Based on the waveform data and data for predicting the sound field in the acoustic space, calculation means for calculating the power distribution of the acoustic space at a predetermined calculation timing, and based on the calculation result by the calculation means, the predetermined And image generation means for generating image data indicating an average power distribution within the period.

  In the sound field simulation apparatus, the image data may be data representing power on the sound receiving surface as a two-dimensional image.

  In the sound field simulation apparatus, the image data may be data representing a contour surface having a predetermined power as a three-dimensional image.

  Furthermore, in the sound field simulation apparatus, the waveform data may be generated by limiting a frequency band of an impulse to a predetermined frequency band.

  Furthermore, in the sound field simulation apparatus, the waveform data may be generated by multiplying a continuous waveform by a window function.

  In the control method of the sound field simulation apparatus for simulating the propagation state of the sound wave radiated from the sound source arranged in the acoustic space, a first waveform data to be input to the sound source as a predetermined period of the sound wave is generated. A second process of calculating the power distribution of the acoustic space at a predetermined calculation timing based on the process, the waveform data and the data for predicting the sound field in the acoustic space, and the second process Based on the calculation result, image data indicating the power distribution of the acoustic space is generated at each calculation timing, and moving image data indicating the sound wave propagation state for the predetermined period is generated based on each image data. The process is provided with the following.

  In the control method of the sound field simulation apparatus for simulating the propagation state of the sound wave radiated from the sound source arranged in the acoustic space, a first waveform data to be input to the sound source as a predetermined period of the sound wave is generated. A second process of calculating the power distribution of the acoustic space at a predetermined calculation timing based on the process, the waveform data and the data for predicting the sound field in the acoustic space, and the second process And a third step of generating image data indicating an average power distribution within the predetermined period based on the calculation result.

  A sound field simulation apparatus for simulating the propagation state of sound waves emitted from a sound source arranged in an acoustic space is a control program for controlling by a computer, and is input to the sound source as a predetermined period of the sound waves Waveform data to be generated, based on the waveform data and data for predicting the sound field in the acoustic space, to calculate the power distribution of the acoustic space at a predetermined calculation timing, based on the calculation result, Image data indicating a power distribution of the acoustic space is generated at each calculation timing, and moving image data indicating a propagation state of sound waves for the predetermined period is generated based on each image data. .

  A sound field simulation apparatus for simulating the propagation state of sound waves emitted from a sound source arranged in an acoustic space is a control program for controlling by a computer, and is input to the sound source as a predetermined period of the sound waves Waveform data to be generated, based on the waveform data and data for predicting the sound field in the acoustic space, to calculate the power distribution of the acoustic space at a predetermined calculation timing, based on the calculation result, Image data indicating an average power distribution within the predetermined period is generated.

  The control program is recorded on a computer-readable recording medium.

  According to the present invention, it is possible to visually know the spatial power distribution and its temporal change.

  Embodiments of the present invention will be described below with reference to the drawings.

[1] First Embodiment FIG. 1 is a block diagram showing a functional configuration of a sound field simulation apparatus 10 according to the first embodiment.

  The sound field simulation apparatus 10 is configured by a computer, and functions as a sound field simulation apparatus by operating a CPU (not shown) of the computer based on a control program stored in advance in the storage unit 17 of the computer. .

  The sound field simulation device 10 simulates the propagation state of sound waves emitted from a sound source arranged in an acoustic space. The setting input unit 11, the input waveform generation unit 13, the sound field calculation unit 15, The storage unit 17, the calculation result output unit 19, and a display unit 21 including an LCD or the like are included.

  The setting input unit 11 inputs input data necessary for sound field calculation for predicting a sound field, specifically, data related to an acoustic space and data related to a sound source, and outputs the data to the sound field calculation unit 15. For example, the setting input unit 11 includes simulation setting data necessary for simulating a sound field, room shape coordinate data regarding the indoor shape of the acoustic space, the position of the sound absorbing material arranged in the acoustic space, and the sound absorption rate indicating the sound absorption rate. Various data such as material data, sound source coordinate data indicating the position of the sound source, and sound source characteristic data are input from the user or read from a file (not shown).

  The input waveform generation unit 13 generates waveform data corresponding to the sound wave emitted from the sound source, and outputs the waveform data to the sound field calculation unit 15. More specifically, the input waveform generation unit 13 generates waveform data as a predetermined period (for example, one period) of sound waves emitted from the sound source. More specifically, the input waveform generation unit 13 selects any one of the plurality of sound waves, and generates waveform data for a predetermined period (for example, one period) in the selected sound wave.

  Here, when the waveform of the selected sound wave is a continuous waveform, the input waveform generation unit 13 generates waveform data by multiplying the continuous waveform by a window function. Specifically, the continuous waveform may be either a periodic waveform or a non-periodic waveform (for example, a waveform corresponding to audio data). Thus, particularly when the continuous waveform is an aperiodic waveform such as audio data, the waveform generated by multiplying the continuous waveform by the window function is regarded as a pseudo-periodic waveform that is periodically repeated. Here, the window function is set so that both ends of the waveform in the generated waveform data are zero.

  For example, the case where the waveform of the sound wave to be radiated by the sound source is a sine wave will be described. The input waveform generation unit 13 multiplies the sine wave by a window function to generate waveform data as shown in FIG. Output to the sound field calculator 15.

  The waveform data generated in this way preferably has a width of a predetermined frequency band (for example, an audible frequency band). That is, the sound wave emitted by inputting waveform data in the sound source is set to be a sound wave close to the sound wave of music.

  Furthermore, when the waveform of the sound wave to be radiated by the sound source is not a continuous waveform, specifically, in the case of an impulse, the frequency band of the impulse is limited to a predetermined frequency band (for example, an audible frequency band), Waveform data as shown in FIG. 3 is generated. By limiting the band in this way, the sound wave emitted by inputting the waveform data in the sound source is set to be a sound wave close to the sound wave of music.

  Thus, by setting the waveform data to a width of a predetermined frequency band (for example, an audible frequency band), unnecessary frequency components are eliminated in the music environment, so that the calculation amount in the sound field calculation unit 15 described later is reduced. Calculation can be speeded up.

  Here, when a plurality of sound sources are set, the waveform data input for each sound source may be changed or different filtering may be performed.

  The sound field calculation unit 15 calculates a sound field based on the waveform data input from the setting input unit 11 and the input data input from the input waveform generation unit 13 and stores the sound field in the storage unit 17.

  The calculation result output unit 19 reads out the sound field calculation result of the sound field calculation unit 15 from the storage unit 17 and generates video data indicating the power distribution.

  Hereinafter, processing operations of the sound field calculation unit 15 and the calculation result output unit 19 will be described in detail. FIG. 4 is a schematic diagram showing a calculation flow in the sound field calculation unit 15. FIG. 5 is a flowchart showing details of the calculation in the sound field calculation unit 15. In the description of FIG. 4 and FIG. 5, the case where there are a plurality of sound sources will be described.

  As shown in FIG. 4, the sound field calculation unit 15 inputs various data such as simulation setting data, room shape coordinate data, sound absorbing material data, sound source coordinate data, and sound source characteristic data from the setting input unit 11 ( ST1).

  Next, the sound field calculation unit 15 calculates the reflection path (sound receiving point coordinates (x, y, z), reflection coefficient α, etc.) for each sound source based on the input data input from the setting input unit 11 ( ST2).

  Next, the sound field calculation unit 15 performs frequency characteristics p (f, x, and f) of the complex sound pressure for each sound source and for each frequency within a predetermined frequency band (for example, an audible frequency band) and for each sound receiving point coordinate in the acoustic space. y, z) is calculated (ST3).

  On the other hand, the sound field calculation unit 15 inputs waveform data w (t) corresponding to the time t generated as a periodic waveform from the input waveform generation unit 13 (ST4).

  Next, the sound field calculator 15 performs Fourier transform on the input waveform data w (t) to calculate w (f) (ST5).

  Next, the sound field calculation unit 15 based on the input data input from the setting input unit 11 and the waveform data w (t) input from the input waveform generation unit 13, the frequency axis f and the spatial axes x, y, z The complex sound pressure P (f, x, y, z) at is calculated. That is, the sound field calculation unit 15 multiplies w (f) and p (f, x, y, z) to calculate a complex sound pressure P (f, x, y, z) (ST6). That is, the sound field calculation unit 15 calculates the convolution of w (f) and p (f, x, y, z) on the time axis, thereby calculating the complex sound pressure P (f, x, y, z). Is calculated.

  Next, the sound field calculation unit 15 performs inverse Fourier transform on the complex sound pressure P (f, x, y, z), and the complex sound pressure p (t, x, z) on the time axis t and the space axes x, y, z. y, z) is calculated (ST7). That is, the sound field calculation unit 15 calculates the complex sound pressure p (t, x, y, z) at each sound receiving point at each predetermined calculation timing. Thus, since the sound field calculation unit 15 can use inverse Fourier transform for the calculation of the sound field, the calculation can be speeded up.

  Next, the sound field calculation unit 15 adds the complex sound pressures p (t, x, y, z) of all sound sources (ST8), and stores this complex sound pressure p (t, x, y, z) in the storage unit 17. (ST9).

  Next, details of the calculation in the sound field calculation unit 15 will be described with reference to FIG. 5 in the case where a plurality of sound sources A1, A2,.

  First, the sound field calculation unit 15 determines whether or not the calculation of the complex sound pressure p (t, x, y, z) has been completed for all the sound sources A1, A2,..., Am (step S1). In other words, in the first embodiment, the sound field calculation unit 15 sequentially calculates the complex sound pressure p (t, x, y, z) for the sound source Am from the sound source A1.

  When the calculation of the complex sound pressure p (t, x, y, z) is not completed for all sound sources A1, A2,..., Am (step S1; No), the sound field calculation unit 15 selects each sound source (for example, The propagation path (sound receiving point coordinates, reflection coefficient α) from the sound source A2) is calculated (step S2).

  Next, the sound field calculation unit 15 calculates the frequency characteristic p (f, x, y, z) of the complex sound pressure for all sound receiving point coordinates (x, y, z) for each sound source (for example, the sound source A2). It is determined whether or not the processing has been completed (step S3).

  More specifically, at sound receiving points (x, y, z) (for example, x = x1, x2,..., Xi, y = y1, y2,..., Yj, z = z1, z2,..., Zk). It is determined whether or not the calculation of the frequency characteristic p (f, x, y, z) of the complex sound pressure has been completed.

  When the calculation of the frequency characteristic p (f, x, y, z) of the complex sound pressure is not completed for all the sound receiving point coordinates (x, y, z) (step S3; No), for example, p (f, If the calculation of xi, yj, zk) is not completed, the sound field calculation unit 15 determines whether the calculation of the frequency characteristic p (f, xi, yj, zk) of the complex sound pressure is completed for all frequencies. Judgment is made (step S4). Here, the total frequency means all frequencies f1 to fn when a plurality of frequencies f1, f2,..., Fn are defined as calculation points within a predetermined frequency band (for example, an audible frequency band). As described above, since the band is limited to the predetermined frequency band, the amount of calculation is reduced and the calculation speeds up.

  When the calculation of the frequency characteristic p (f, xi, yj, zk) of the complex sound pressure is not completed for all frequencies (step S4; No), the sound field calculation unit 15 uses the sound sources A1, A2,. Separately, the frequency characteristic p (f, xi, yj, zk) of the complex sound pressure at each frequency f1, f2,..., Fn and the sound receiving point (xi, yj, zk) is calculated (step S5). That is, the frequency characteristic p (f) of the complex sound pressure at the sound receiving point (xi, yj, zk) until the calculation is completed for all frequencies over the frequencies f1, f2,..., Fn (step S5; Yes). , Xi, yj, zk).

  In step S3, when calculation of the frequency characteristics p (f, x, y, z) of the complex sound pressure at all sound receiving points (x, y, z) is completed (step S3; Yes), sound field calculation is performed. The unit 15 multiplies w (f) obtained by Fourier transforming the waveform data w (t) and the frequency characteristic p (f, x, y, z) of each complex sound pressure (step S6), and performs inverse Fourier transform. Thus, the complex sound pressure p (t, z, y, z) at each sound receiving point (x, y, z) at each time (each calculation timing) t is calculated (step S7).

  Next, the sound field calculation unit 15 adds the complex sound pressures p (t, x, y, z) of all sound sources (step S8), and proceeds to the determination of step S1. In this way, when the calculation is completed for all sound sources (step S1), the calculation process of the sound field calculation unit 15 is completed.

  FIG. 6 is a schematic diagram showing the flow of calculation in the calculation result output unit 19.

  The calculation result output unit 19 reads the complex sound pressure p (t, x, y, z) from the storage unit 17 (ST11), and reads the complex sound pressure p (t, x, y, z) and its coordinates ( The power distribution of the acoustic space at each calculation timing is calculated based on the particle velocity at x, y, z).

  Next, the calculation result output unit 19 generates image data indicating the power distribution in the acoustic space at each calculation timing based on the power distribution in the acoustic space at each calculation timing (ST12).

  Here, in the first embodiment, the calculation result output unit 19 generates image data in which the arrangement of the sound receiving points is two-dimensional and the power distribution on the sound receiving surface is represented as a two-dimensional image. .

  FIG. 7 is a diagram illustrating an example of an image of a two-dimensional power distribution displayed on the display unit 21. The image M1 in FIG. 7 shows the power distribution when z = 0 at a certain time. In FIG. 7, point A indicates the position of the sound source, and the coordinates of this sound source are (x, y, z) = (0, 0, 0).

  The sound receiving surface in the image M1 is configured to be selectable by the user. That is, in the setting input unit 11, data indicating the sound receiving surface is input as simulation setting data. Here, in the image M <b> 1, the power of the sound wave is expressed corresponding to the shade of a specific color. That is, the value of the sound wave power corresponds to the density of a specific color. Note that the power of the sound wave may be represented corresponding to the color instead of the shade of the specific color. That is, the value of the sound wave power corresponds to the color. With these, the user can visually and instantaneously determine the spatial power distribution of sound waves close to music.

  The calculation result output unit 19 generates moving image data based on the image data at each calculation timing. That is, moving image data is generated by arranging image data in time series. This moving image data is generated by arranging each image data in time series in which sound waves based on the waveform data generated by the input waveform generation unit 13 are emitted from the sound source and reach each position (sound receiving point) in the acoustic space. . That is, moving image data indicating the propagation state of sound waves for a predetermined period (for example, one period) is generated. Then, the calculation result output unit 19 generates a moving image file based on the generated moving image data (ST13 in FIG. 6).

  The moving image file generated in this way is stored in the storage unit 17 by the calculation result output unit 19. By generating a moving image file in this way, it is easy to view and distribute the calculation results, and the user can watch the temporal change in the sound power distribution in the acoustic space by playing this moving image file. be able to. Moreover, since the waveform data of the music that is actually played back can be used as the waveform data, the user can see the spatial power distribution of sound waves that are closer to the sound that is actually played back, and their temporal changes. .

  In addition, by reproducing the moving image data generated for one period using moving image reproduction software that can be repeatedly reproduced, the user can view the change as a periodic sound field.

[2] Second Embodiment In the first embodiment, the case where the calculation result output unit 19 in FIG. 1 generates image data representing the power on the sound receiving surface as a two-dimensional image has been described. In the second embodiment, a case will be described in which the calculation result output unit 119 generates image data representing a contour plane of a predetermined power at each time as a three-dimensional image. Hereinafter, in this 2nd Embodiment, the part similar to the said 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  FIG. 8 is a block diagram showing a functional configuration of the sound field simulation apparatus 100 according to the second embodiment.

  The calculation result output unit 119 reads the complex sound pressure p (t, x, y, z) at each calculation timing from the storage unit 17 and calculates the power distribution of the acoustic space at each calculation timing.

  Next, the calculation result output unit 119 generates image data indicating the power distribution in the acoustic space at each calculation timing based on the power distribution in the acoustic space at each calculation timing.

  FIG. 9 is a diagram illustrating an example of an image of a three-dimensional power distribution displayed on the display unit 21.

  An image M2 in FIG. 9 shows a power distribution of a predetermined power at a certain time. This predetermined power is represented as a contour surface R in the image M2. In FIG. 9, point A indicates the position of the sound source, and the coordinates of this sound source are (x, y, z) = (0, 0, 0).

  The predetermined power represented by the contour surface R in the image M2 is configured to be selectable by the user. That is, in the setting input unit 11 (FIG. 1), data indicating a predetermined power is input as simulation setting data. Here, in the image M2, the contour surface R indicating the predetermined power of the sound wave is represented as a specific color. As a result, the user can visually and instantaneously determine the spatial power distribution of sound waves close to music.

[3] Third Embodiment In the first and second embodiments, the calculation result output units 19 and 119 calculate the power distribution of the acoustic space for each calculation timing, and the power distribution of the acoustic space for each calculation timing. In the third embodiment, a case where the calculation result output unit 219 generates image data indicating an average power distribution within a predetermined period will be described. Hereinafter, in this 3rd Embodiment, the part similar to the said 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  FIG. 10 is a block diagram showing a functional configuration of the sound field simulation apparatus 200 according to the third embodiment.

  The calculation result output unit 219 reads the complex sound pressure p (t, x, y, z) from the storage unit 17 and calculates the power distribution of the acoustic space at each calculation timing.

  Next, the calculation result output unit 19 calculates the average value of the power at all times for each sound receiving point (x, y, z) based on the power distribution in the acoustic space for each calculation timing, and calculates the average power distribution. Are generated as image data and stored in the storage unit 17 as a still image file. By displaying on the display unit 21 based on the still image file, the user can visually determine the spatial power distribution instantaneously.

  As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this.

  For example, in the above embodiment, the case where the input waveform generation unit 13 generates waveform data for one period as a predetermined period of sound waves has been described. However, the present invention is not limited to this, and the calculation amount in the sound field calculation unit is not limited to this. It is also possible to generate waveform data for several cycles of sound waves in the input waveform generation unit within a range that does not become enormous.

  In the above embodiment, the case where the control program is stored in the storage unit 17 has been described. However, the control program is recorded in advance on recording media such as various magnetic disks, optical disks, and memory cards, and is read from these recording media. It can also be configured to install. It is also possible to provide a communication interface, download the control program via a network such as the Internet or a LAN, install and execute the control program.

It is a block diagram which shows the functional structure of the sound field simulation apparatus which concerns on this 1st Embodiment. It is a wave form diagram which shows the waveform produced | generated by multiplying a continuous waveform by a window function. It is a wave form diagram which shows the waveform produced | generated by band-limiting an impulse. It is a schematic diagram which shows the flow of calculation in a sound field calculation part. It is a flowchart which shows the detail of calculation in a sound field calculation part. It is a schematic diagram which shows the flow of calculation in a calculation result output part. It is a figure which shows an example of the image of the two-dimensional power distribution displayed on a display part. It is a block diagram which shows the functional structure of the sound field simulation apparatus which concerns on this 2nd Embodiment. It is a figure which shows an example of the image of the three-dimensional power distribution displayed on a display part. It is a block diagram which shows the functional structure of the sound field simulation apparatus which concerns on this 3rd Embodiment.

Explanation of symbols

10, 100, 200 Sound field simulation apparatus 11 Setting input unit 13 Input waveform generation unit (waveform generation means)
15 Sound field calculation part (calculation means)
17 Storage unit 19, 119, 219 Calculation result output unit (calculation means, moving image generation means, image generation means)
21 Display section

Claims (11)

In a sound field simulation device that simulates the propagation state of sound waves emitted from a sound source arranged in an acoustic space,
Waveform generating means for generating waveform data to be input to the sound source as a predetermined period of the sound wave;
Based on the waveform data and data for predicting a sound field in the acoustic space, calculation means for calculating a power distribution of the acoustic space at a predetermined calculation timing;
Based on the calculation result by the calculation means, image data indicating the power distribution of the acoustic space is generated at each calculation timing, and based on each image data, moving image data indicating the propagation state of the sound wave for the predetermined period is generated. A sound field simulation apparatus comprising: a moving image generating means for generating. In a sound field simulation device that simulates the propagation state of sound waves emitted from a sound source arranged in an acoustic space,
Waveform generating means for generating waveform data to be input to the sound source as a predetermined period of the sound wave;
Based on the waveform data and data for predicting a sound field in the acoustic space, calculation means for calculating a power distribution of the acoustic space at a predetermined calculation timing;
A sound field simulation apparatus comprising: image generation means for generating image data indicating an average power distribution within the predetermined period based on a calculation result by the calculation means. In the sound field simulation apparatus according to claim 1 or 2,
The sound field simulation apparatus, wherein the image data is data representing power on a sound receiving surface as a two-dimensional image. In the sound field simulation apparatus according to claim 1 or 2,
The sound field simulation apparatus, wherein the image data is data representing a contour surface having a predetermined power as a three-dimensional image. In the sound field simulation device according to any one of claims 1 to 4,
The sound field simulation apparatus, wherein the waveform data is generated by limiting a frequency band of an impulse to a predetermined frequency band. In the sound field simulation device according to any one of claims 1 to 4,
The sound field simulation apparatus, wherein the waveform data is generated by multiplying a continuous waveform by a window function. In the control method of the sound field simulation apparatus that simulates the propagation state of the sound wave radiated from the sound source arranged in the acoustic space,
A first step of generating waveform data to be input to the sound source as a predetermined period of the sound wave;
A second step of calculating a power distribution of the acoustic space at a predetermined calculation timing based on the waveform data and data for predicting a sound field in the acoustic space;
Based on the calculation result in the second process, image data indicating the power distribution of the acoustic space is generated at each calculation timing, and a moving image indicating the propagation state of the sound wave for the predetermined period based on each image data And a third step of generating data, comprising: a sound field simulation apparatus control method; In the control method of the sound field simulation apparatus that simulates the propagation state of the sound wave radiated from the sound source arranged in the acoustic space,
A first step of generating waveform data to be input to the sound source as a predetermined period of the sound wave;
A second step of calculating a power distribution of the acoustic space at a predetermined calculation timing based on the waveform data and data for predicting a sound field in the acoustic space;
A control method for a sound field simulation apparatus, comprising: a third step of generating image data indicating an average power distribution within the predetermined period based on a calculation result in the second step. A control program for controlling, by a computer, a sound field simulation device that simulates a propagation state of sound waves emitted from a sound source arranged in an acoustic space,
Generating waveform data to be input to the sound source as a predetermined period of the sound wave;
Based on the waveform data and data for predicting the sound field in the acoustic space, the power distribution of the acoustic space at a predetermined calculation timing is calculated,
Based on the calculation result, image data indicating the power distribution of the acoustic space is generated at each calculation timing, and moving image data indicating the propagation state of the sound wave for the predetermined period is generated based on each image data. A control program characterized by A control program for controlling, by a computer, a sound field simulation device that simulates a propagation state of sound waves emitted from a sound source arranged in an acoustic space,
Generating waveform data to be input to the sound source as a predetermined period of the sound wave;
Based on the waveform data and data for predicting the sound field in the acoustic space, the power distribution of the acoustic space at a predetermined calculation timing is calculated,
A control program for generating image data indicating an average power distribution within the predetermined period based on the calculation result.   A computer-readable recording medium on which the control program according to claim 9 or 10 is recorded.

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