Disaster prevention broadcast evaluation device and disaster prevention broadcast evaluation method

Abstract

To provide a disaster prevention broadcasting evaluation device and a disaster prevention broadcasting evaluation method for executing an inspection of the state of a speaker for disaster prevention broadcasting easily over a wide range.SOLUTION: A disaster prevention broadcasting evaluation device comprises: a storage unit that stores reference voice data of disaster prevention broadcasting; a data acquisition unit that acquires information on the position of a portable terminal and recorded voice data of disaster prevention broadcasting output from a speaker 13 and recorded by a microphone of the portable terminal; a comparison unit that compares the reference voice data with the recorded voice data and takes a result of comparison as a score; and an evaluation unit that finds the distribution of the information on the position of the portable terminal and the score to evaluate at least one of the state of installation of the speaker for disaster prevention broadcasting and the sound quality of the disaster prevention broadcasting.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a disaster prevention broadcast evaluation device and a disaster prevention broadcast evaluation method. [Background technology]

[0002] For example, a local government may have a disaster prevention broadcasting system that notifies residents of disaster prevention information. The disaster prevention broadcasting system includes a disaster prevention broadcasting device installed in the local government office and a number of speakers installed at multiple locations in the local government area. When necessary, local government officials broadcast the disaster prevention information from the multiple speakers using the disaster prevention broadcasting device. An example of such a disaster prevention broadcasting system is described in the following patent document. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-30051 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-252279 Summary of the Invention [Problem to be solved by the invention]

[0004] Disaster prevention broadcasting systems broadcast disaster prevention information from multiple speakers using disaster prevention broadcasting devices to inform residents of the information, so the location of the speakers is important. Therefore, it is necessary to confirm that the speakers are installed in appropriate locations. However, if a company is commissioned to conduct a speaker location survey, the number of speakers to be surveyed is limited, making it difficult to conduct a thorough survey. In this case, local governments could consider conducting the survey themselves, but this requires specialized measuring equipment and technology, making it difficult to conduct a highly accurate survey. Furthermore, depending on the speaker placement location, the company may have to enter residents' homes to conduct the survey, which raises issues of resident consent and privacy. Furthermore, the technologies in Patent Documents 1 and 2 cannot evaluate the degree to which the audio from disaster prevention broadcast speakers can be heard.

[0005] The present invention has been made in view of the above, and has an object to easily inspect the condition of speakers used for disaster prevention broadcasting over a wide area. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the disaster prevention broadcast evaluation device of the present invention comprises a memory unit that stores reference audio data for disaster prevention broadcasts, a data acquisition unit that acquires location information of a mobile terminal and recorded audio data for the disaster prevention broadcasts output from a speaker and recorded by a microphone of the mobile terminal, a comparison unit that compares the reference audio data with the recorded audio data and sets the comparison result as a score, and an evaluation unit that evaluates at least one of the installation status of the speaker for the disaster prevention broadcasts and the sound quality of the disaster prevention broadcasts by calculating the distribution of the location information of the mobile terminal and the score.

[0007] The disaster prevention broadcast evaluation method of the present invention includes the steps of acquiring location information of a mobile terminal and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile terminal, comparing the recorded audio data with predetermined reference audio data and using the comparison result as a score, and evaluating at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by calculating the distribution of the location information of the mobile terminal and the score. [Effects of the Invention]

[0008] According to the present invention, it is possible to easily investigate the state of speakers used for disaster prevention broadcasting over a wide range. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing a disaster prevention broadcasting system according to this embodiment. [Figure 2] FIG. 2 is a flowchart showing a method for evaluating audio data in the disaster prevention broadcast evaluation device. [Figure 3] FIG. 3 is a flowchart showing a method for evaluating time data in the disaster prevention broadcast evaluation device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a disaster prevention broadcast evaluation device, a disaster prevention broadcast evaluation method, and a program according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiment.

[0011] <Disaster Prevention Broadcast System> FIG. 1 is a block diagram showing a disaster prevention broadcasting system according to this embodiment.

[0012] 1, a disaster prevention broadcasting system 10 is installed in, for example, a disaster prevention department of a local government. The disaster prevention broadcasting system 10 includes an operation device 11, a disaster prevention broadcasting control device 12, a speaker 13, and a GPS receiving unit (not shown).

[0013] The operation device 11 is connected to the disaster prevention broadcast control device 12. The operation device 11 can be operated by a local government employee, and inputs various operation command signals to the disaster prevention broadcast control device 12. For example, the employee operates the operation device 11 to input a disaster prevention broadcast start signal or a disaster prevention broadcast stop signal to the disaster prevention broadcast control device 12.

[0014] The disaster prevention broadcast control device 12 is connected to a speaker 13. The disaster prevention broadcast control device 12 controls the speaker 13 based on various operation command signals input from the operation device 11. For example, the disaster prevention broadcast control device 12 outputs a disaster prevention broadcast from the speaker 13 based on a disaster prevention broadcast start signal input from the operation device 11. The disaster prevention broadcast control device 12 also stops the output of a disaster prevention broadcast from the speaker 13 based on a disaster prevention broadcast stop signal input from the operation device 11.

[0015] The speakers 13 are installed at a plurality of predetermined positions in an area managed by a local government. That is, the speakers 13 are installed at a plurality of positions spaced a predetermined distance apart. Therefore, the disaster prevention broadcast control device 12 is connected to the plurality of speakers 13.

[0016] The disaster prevention broadcast system 10 also includes a disaster prevention broadcast evaluation device 21 and a display unit 22. As will be described later, the disaster prevention broadcast evaluation device 21 evaluates the position of the speaker 13 and evaluates the sound quality of the disaster prevention broadcast output from the speaker 13. The display unit 22 is connected to the disaster prevention broadcast evaluation device 21. The display unit 22 displays the evaluation results of the disaster prevention broadcast evaluation device 21.

[0017] The disaster prevention broadcast evaluation device 21 can be connected to a mobile terminal 100 wirelessly or via a network. The mobile terminal 100 is, for example, a smartphone or a tablet PC.

[0018] <Mobile device> The mobile terminal 100 is carried and operated by a local resident. The mobile terminal 100 includes at least a microphone 101, a GPS receiving unit 102, a clock 103, a processing unit 104, and a communication unit 105.

[0019] The microphone 101 is operated by a resident carrying the mobile terminal 100 to record audio data of a disaster prevention broadcast output from a speaker 13 installed nearby, and acquires the recorded audio data. At this time, the microphone 101 may record the recorded audio data in a storage unit (not shown) as necessary.

[0020] The GPS receiving unit 102 is composed of a GPS receiving circuit, a GPS receiving antenna, etc., and receives GPS signals. The GPS receiving unit 102 acquires location information of the mobile terminal 100 based on the received GPS signals.

[0021] The clock 103 acquires and displays the current time.

[0022] When the microphone 101 acquires recorded audio data of a disaster prevention broadcast output from the speaker 13, the processing unit 104 acquires the location information of the mobile terminal 100 from the GPS receiving unit 102 and acquires the time information from the clock 103. Then, the processing unit 104 associates the recorded audio data with the location information and time information of the mobile terminal 100.

[0023] The communication unit 105 can be connected to the disaster prevention broadcast evaluation device 21 of the disaster prevention broadcast system 10 wirelessly or via a network. The network is, for example, the Internet. The communication unit 105 can transmit the recorded audio data associated by the processing unit 104 and the associated information of the location information and time information of the mobile terminal 100 to the disaster prevention broadcast evaluation device 21.

[0024] In addition to the microphone 101, GPS receiving unit 102, clock 103, processing unit 104, and communication unit 105, the mobile terminal 100 may also include, for example, a camera, a map information acquisition unit, and a weather information acquisition unit. The camera acquires images of surrounding information. The map information acquisition unit acquires surrounding map information via the communication unit 105. The weather information acquisition unit acquires weather information such as the surrounding weather, temperature, and wind direction. The processing unit 104 may associate surrounding image information, map information, and weather information with the recorded audio data, the location information and time information of the mobile terminal 100, and the communication unit 105 may transmit this associated information to the disaster prevention broadcast evaluation device 21.

[0025] <Disaster prevention broadcast evaluation device> The disaster prevention broadcast evaluation device 21 includes a communication unit (data acquisition unit) 31, a storage unit 32, a comparison unit 33, and an evaluation unit .

[0026] The communication unit 31 can be connected to the communication unit 105 of the mobile terminal 100 wirelessly or via a network. The network is, for example, the Internet. The communication unit 31 can receive and acquire recorded audio data transmitted from the communication unit 105 of the mobile terminal 100 and related information such as the location information and time information of the mobile terminal 100. Note that although the data acquisition unit is the communication unit 31, it is not limited to this configuration. The data acquisition unit may be a cable that can be connected to the mobile terminal 100 via a wired connection, or a recording medium such as an SD card or USB flash memory.

[0027] The memory unit 32 stores reference audio data for disaster prevention broadcasts. The reference audio data is the same as the audio data that the disaster prevention broadcast control device 12 outputs from the speaker 13. The memory unit 32 also stores the arrival time of the reference audio data for disaster prevention broadcasts. The arrival time is calculated based on the position information of the speaker 13 and the position information of the mobile terminal 100. The arrival time is the time from the output start time at which the disaster prevention broadcast is output from the speaker 13 to the arrival time at which the disaster prevention broadcast reaches the mobile terminal 100. In other words, when a disaster prevention broadcast start signal is input from the operation device 11, the disaster prevention broadcast control device 12 outputs the reference audio data to the multiple speakers 13, and the disaster prevention broadcast is broadcast from each speaker 13. The output start time is the time at which the speaker 13 outputs the reference audio data transmitted from the disaster prevention broadcast control device 12. The arrival time is the time at which the disaster prevention broadcast output from each speaker 13 reaches each mobile terminal 100. The arrival time is the time from the output start time to the arrival time.

[0028] The comparison unit 33 and the evaluation unit 34 are a control device. The control device is realized, for example, by a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) executing a program stored in a storage unit (not shown) using a RAM (Random Access Memory) or the like as a working area. The control device is also a controller, and may be realized, for example, by an integrated circuit such as a SOC (System on a Chip) or an FPGA (Field Programmable Gate Array).

[0029] The comparison unit 33 has an audio data comparison unit 41, a time data comparison unit 42, and a sound quality data comparison unit 43. The audio data comparison unit 41 has a conversion unit 51 and an audio coincidence calculation unit 52. The time data comparison unit 42 has a time calculation unit 53 and a time coincidence calculation unit 54.

[0030] In the comparison unit 33, the audio data comparison unit 41 compares the reference audio data of the disaster prevention broadcast recorded in the storage unit 32 with the recorded audio data received by the communication unit 31, and determines the comparison result as a score. In this case, first, the conversion unit 51 converts the recorded audio data received by the communication unit 31 into text sentences. That is, the conversion unit 51 converts the recorded audio that residents recognize aurally into recorded sentences that residents recognize visually. Meanwhile, the reference audio data of the disaster prevention broadcast recorded in the storage unit 32 has been converted into text sentences in advance by the conversion unit 51 and stored in the storage unit 32.

[0031] Next, the speech matching calculation unit 52 compares the text sentence of the reference speech data with the text sentence of the recorded speech data to calculate the speech matching degree. This speech matching degree is the degree of matching between the text sentence of the reference speech data and the text sentence of the recorded speech data, and is expressed, for example, as a percentage or a 10-level scale. For example, if the text sentence of the reference speech data and the text sentence of the recorded speech data match perfectly, the matching degree is 100% or level 10. Also, if the matching degree between the text sentence of the reference speech data and the text sentence of the recorded speech data is 80%, the matching degree is 80% or level 8.

[0032] Although the conversion unit 51 converts the recorded voice data into text sentences, and the voice matching calculation unit 52 calculates the voice matching degree by comparing the text sentences of the reference voice data with the text sentences of the recorded voice data, the present invention is not limited to this configuration. For example, the conversion unit 51 may convert the recorded voice data into voice output waveforms, and the voice matching calculation unit 52 may calculate the voice matching degree by comparing the reference voice output waveform with the recorded voice output waveform, or other methods may be used.

[0033] In the comparison unit 33, the time data comparison unit 42 compares the arrival time (output start time - arrival time) of the disaster prevention broadcast recorded in the memory unit 32 with the delay time (output start time - recording time) calculated from the time information received by the communication unit 31, and obtains a score from the comparison result. In this case, the time calculation unit 53 first calculates the delay time from the output start time of the disaster prevention broadcast output from the speaker 13 to the recording time when the microphone 101 of the mobile terminal 100 recorded the audio data of the disaster prevention broadcast. Next, the time agreement calculation unit 54 compares the arrival time of the disaster prevention broadcast with the delay time to calculate the time agreement. This time agreement is the deviation time between the arrival time of the disaster prevention broadcast and the delay time.

[0034] In the comparison unit 33, the sound quality data comparison unit 43 compares the reference sound data of the disaster prevention broadcast recorded in the storage unit 32 with the recorded sound data received by the communication unit 31, and calculates a score for the comparison result. Here, the sound quality of the sound data refers to frequency (low or high tones), loudness, sharpness, fluctuation intensity, volume, etc. Similar to the sound data comparison unit 41 and the time data comparison unit 42, the sound quality data comparison unit 43 compares the sound quality of the reference sound data of the disaster prevention broadcast recorded in the storage unit 32 with the sound quality of the recorded sound data received by the communication unit 31, and calculates a score for the comparison result. In this case, the sound quality data comparison unit 43 compares the sound quality of the reference sound data of the disaster prevention broadcast with the sound quality of the recorded sound data, and calculates a degree of sound quality agreement. This degree of sound quality agreement is expressed, for example, as a percentage or a 10-point scale.

[0035] The evaluation unit 34 has an audio data evaluation unit 61, a time data evaluation unit 62, and a sound quality data evaluation unit 63. The evaluation unit 34 evaluates the installation location (installation status) of the speaker 13 for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast based on the distribution of scores associated with the location information of the mobile terminal 100.

[0036] The audio data evaluation unit 61 evaluates the installation location (installation status) of the disaster prevention broadcast speaker 13 based on the distribution of the audio coincidences associated with the location information of the mobile terminal 100, based on the audio coincidences calculated by the audio coincidence calculation unit 52 of the audio data comparison unit 41. That is, in the disaster prevention broadcast evaluation device 21, the communication unit 31 receives disaster prevention broadcast information from the mobile terminals 100 of many residents in the area. Many residents record the disaster prevention broadcasts using the microphones 101 of the mobile terminals 100 at different locations in the area. Therefore, the audio data evaluation unit 61 plots the audio coincidences at different locations in the area on a map of the area. Then, the audio data evaluation unit 61 evaluates the installation location of the disaster prevention broadcast speaker 13 based on the distribution of the audio coincidences at these multiple different locations.

[0037] That is, in an area where the degree of voice matching is high, it is evaluated that the speaker 13 is installed in the correct position. On the other hand, in an area where the degree of voice matching is low, it is evaluated that the speaker 13 is installed in the wrong position. In this case, it is possible to present the need to change the installation position of the speaker 13.

[0038] The time data evaluation unit 62 evaluates the installation location (installation status) of the disaster prevention broadcast speaker 13 based on the distribution of the time coincidence associated with the location information of the mobile terminal 100, based on the time coincidence calculated by the time coincidence calculation unit 54 of the time data comparison unit 42. That is, the time data evaluation unit 62 plots the time coincidence at different locations in the area on a map of the area. Then, the time data evaluation unit 62 evaluates the installation location of the disaster prevention broadcast speaker 13 based on the distribution of the time coincidence at these multiple different locations. That is, in areas where the time coincidence is high, the speaker 13 is evaluated as being installed in the correct location. On the other hand, in areas where the time coincidence is low, the speaker 13 is evaluated as being installed in the incorrect location. In this case, it can be suggested that the installation location of the speaker 13 needs to be changed.

[0039] Similarly, the sound quality data evaluation unit 63 evaluates the sound quality of the speaker 13 of the disaster prevention broadcast based on the distribution of the sound quality matches associated with the location information of the mobile terminal 100, based on the sound quality match. That is, the sound quality data evaluation unit 63 plots the sound quality matches at different locations in the area on a map of the area. Then, the sound quality data evaluation unit 63 evaluates the sound quality of the speaker 13 of the disaster prevention broadcast based on the distribution of the sound quality matches at the multiple different locations. That is, in areas where the sound quality match is high, the sound quality data evaluation unit 63 evaluates that the sound quality of the speaker 13 has been adjusted correctly. On the other hand, in areas where the sound quality match is low, the sound quality data evaluation unit 63 evaluates that the sound quality of the speaker 13 has not been adjusted correctly. In this case, it can be suggested that the sound quality of the speaker 13 needs to be adjusted.

[0040] <Evaluation method for disaster prevention broadcasts> FIG. 2 is a flowchart showing a method for evaluating audio data in the disaster prevention broadcast evaluation device, and FIG. 3 is a flowchart showing a method for evaluating time data in the disaster prevention broadcast evaluation device.

[0041] In the method for evaluating audio data of disaster prevention broadcasts, as shown in FIGS. 1 and 2, in step S11, a local government employee operates the operation device 11 to input a disaster prevention broadcast start signal to the disaster prevention broadcast control device 12. The disaster prevention broadcast control device 12 then outputs a disaster prevention broadcast from a number of speakers 13 installed in the area. In step S12, a resident uses the microphone 101 of the mobile terminal 100 to record the disaster prevention broadcast being broadcast from the speaker 13. In step S13, the resident operates the mobile terminal 100, and the processing unit 104 transmits the audio data of the recorded disaster prevention broadcast (recorded audio data) and location information of the location where the disaster prevention broadcast was recorded to the disaster prevention broadcast evaluation device 21 of the local government.

[0042] In step S14, the local government's disaster prevention broadcast evaluation device 21 determines whether the communication unit 31 has received the recorded audio data of the disaster prevention broadcast and the location information from the resident's mobile terminal 100. Here, if the disaster prevention broadcast evaluation device 21 determines that the communication unit 31 has not received the recorded audio data of the disaster prevention broadcast and the location information from the resident's mobile terminal 100 (No), it waits in this state. On the other hand, if the disaster prevention broadcast evaluation device 21 determines that the communication unit 31 has received the recorded audio data of the disaster prevention broadcast and the location information from the resident's mobile terminal 100 (Yes), it proceeds to step S15.

[0043] In step S15, in the disaster prevention broadcast evaluation device 21, the audio data comparison unit 41 converts the recorded audio data received by the conversion unit 51 into text sentences. In step S16, the audio data comparison unit 41 calculates the audio coincidence by having the audio coincidence calculation unit 52 compare the text sentences of the reference audio data with the text sentences of the recorded audio data. Then, in step S17, the audio data evaluation unit 61 evaluates the installation location of the disaster prevention broadcast speaker 13 by the distribution of the audio coincidences associated with the location information of the mobile terminal 100, based on the audio coincidences calculated by the audio coincidence calculation unit 52. That is, the audio data evaluation unit 61 plots the audio coincidences at different locations in the area on a map of the area.

[0044] Then, in step S18, the voice data evaluation unit 61 outputs the evaluation result to the display unit 22. The display unit 22 displays the voice matching degrees at a plurality of different positions on a map of the area. Therefore, local government officials can evaluate the installation positions of the emergency broadcast speakers 13 by looking at the distribution of the voice matching degrees displayed on the display unit 22. For example, the voice matching degrees are expressed as levels 1 to 10, and the installation positions of the speakers 13 expressed as voice matching levels 1 to 3 need to be reviewed.

[0045] In the method for evaluating time data of disaster prevention broadcasts, as shown in FIGS. 1 and 3, in step S21, a local government employee operates the operation device 11 to input a disaster prevention broadcast start signal to the disaster prevention broadcast control device 12. The disaster prevention broadcast control device 12 then outputs a disaster prevention broadcast from a number of speakers 13 installed in the area. In step S22, a resident uses the microphone 101 of the mobile terminal 100 to record the disaster prevention broadcast broadcast from the speaker 13. In step S23, the resident operates the mobile terminal 100, and the processing unit 104 transmits location information of the location where the disaster prevention broadcast was recorded and time information of the time when the disaster prevention broadcast was recorded to the disaster prevention broadcast evaluation device 21 of the local government.

[0046] In step S24, the disaster prevention broadcast evaluation device 21 of the local government determines whether the communication unit 31 has received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100. Here, if the disaster prevention broadcast evaluation device 21 determines (No) that the communication unit 31 has not received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100, it waits in this state. On the other hand, if the disaster prevention broadcast evaluation device 21 determines (Yes) that the communication unit 31 has received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100, it proceeds to step S25.

[0047] In step S25, in the disaster prevention broadcast evaluation device 21, the time calculation unit 53 of the time data comparison unit 42 calculates the delay time from the start time of the disaster prevention broadcast output to the recording time when the microphone 101 of the mobile terminal 100 recorded the audio data of the disaster prevention broadcast. In step S26, the time agreement calculation unit 54 compares the arrival time of the disaster prevention broadcast with the delay time to calculate the time agreement. Then, in step S27, the time data evaluation unit 62 evaluates the installation location of the disaster prevention broadcast speaker 13 by the distribution of the time agreement associated with the location information of the mobile terminal 100 based on the time agreement calculated by the time agreement calculation unit 54. That is, the time data evaluation unit 62 displays the time agreement at different locations in the area on a map of the area.

[0048] Then, in step S28, the time data evaluation unit 62 outputs the evaluation result to the display unit 22. The display unit 22 displays the time coincidence degrees at a plurality of different positions on a map of the area. Therefore, local government officials can evaluate the installation positions of the emergency broadcast speakers 13 by looking at the distribution of the time coincidence degrees displayed on the display unit 22. For example, the time coincidence degrees are expressed as levels 1 to 10, and the installation positions of the speakers 13 expressed as levels 1 to 3 of the time coincidence degree need to be reviewed.

[0049] In the above explanation, the method for evaluating audio data and the method for evaluating time data are explained using separate flowcharts, but they may be performed simultaneously. Also, the method for evaluating sound quality of audio data for disaster prevention broadcasts is almost the same process as the method for evaluating audio data and the method for evaluating time data, and may be performed separately or simultaneously. The process is almost the same.

[0050] [Effects of this embodiment] The disaster prevention broadcast evaluation device of this embodiment comprises a memory unit 32 that stores reference audio data for disaster prevention broadcasts, a communication unit (data acquisition unit) 31 that acquires location information of the mobile terminal 100 and recorded audio data for disaster prevention broadcasts output from the speaker 13 and recorded by the microphone 101 of the mobile terminal, a comparison unit 33 that compares the reference audio data with the recorded audio data and sets the comparison result as a score, and an evaluation unit 34 that evaluates at least one of the installation location (installation status) of the speaker for disaster prevention broadcasts and the sound quality of the disaster prevention broadcasts by calculating the distribution of the location information of the mobile terminal 100 and the score.

[0051] Therefore, the state of the speakers for disaster prevention broadcasts is evaluated by acquiring audio data of the disaster prevention broadcasts using mobile terminals 100 carried by local residents, and then acquiring and comparing this audio data at the local government side to find the distribution of the position information and scores of the mobile terminals 100. As a result, it is not necessary to outsource the investigation of the state of the speakers 13 to a contractor, and there are no issues of resident consent or privacy, and it is possible to easily investigate the state of speakers for disaster prevention broadcasts over a wide area.

[0052] In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 has a voice matching calculation unit 52 that compares reference voice data with recorded voice data to calculate the voice matching degree, and the evaluation unit 34 evaluates the installation position of the speaker 13 for disaster prevention broadcasts by determining the distribution between the position information of the mobile terminal 100 and the voice matching degree calculated by the voice matching calculation unit 52. Therefore, evaluation of recorded voice data for disaster prevention broadcasts can be easily performed.

[0053] In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 has a conversion unit 51 that converts recorded voice data into text sentences, and the voice coincidence calculation unit 52 calculates the voice coincidence by comparing the text sentences of the reference voice data with the text sentences of the recorded voice data. Therefore, the recorded voice data of disaster prevention broadcasts can be evaluated with high accuracy.

[0054] In the disaster prevention broadcast evaluation device of this embodiment, the memory unit 32 stores the arrival time from the output start time of the disaster prevention broadcast from the speaker 13 to the arrival time of the disaster prevention broadcast at the mobile terminal 100, which is calculated based on the location information of the speaker 13 and the location information of the mobile terminal 100. The communication unit 31 acquires time information of the recording time when the recorded audio data of the disaster prevention broadcast was recorded by the microphone 101 of the mobile terminal 100. The comparison unit 33 has a time calculation unit 53 that calculates the delay time from the output start time to the recording time and a time agreement calculation unit 54 that compares the arrival time with the delay time to calculate the time agreement. The evaluation unit 34 evaluates the installation position of the speaker 13 of the disaster prevention broadcast by calculating the distribution of the location information of the mobile terminal 100 and the time agreement calculated by the time agreement calculation unit 54. Therefore, the delay state of the disaster prevention broadcast audio data can be easily investigated with high accuracy.

[0055] In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 compares the sound quality of the reference sound data with the sound quality of the recorded sound data to calculate the degree of sound quality agreement, and the evaluation unit 34 evaluates the sound quality of the disaster prevention broadcast output from the disaster prevention broadcast by determining the distribution between the location information of the mobile terminal 100 and the degree of sound quality agreement calculated by the comparison unit 33. This makes it possible to easily evaluate the recorded sound data of the disaster prevention broadcast.

[0056] The disaster prevention broadcast evaluation device according to the present invention has been described above, but it may be embodied in various different forms other than the above-described embodiment.

[0057] The components of the illustrated disaster prevention broadcast evaluation device are conceptual and functional, and do not necessarily have to be physically configured as shown. In other words, the specific form of each device is not limited to that shown, and all or part of them may be functionally or physically distributed or integrated in any unit depending on the processing load and usage status of each device.

[0058] The configuration of the disaster prevention broadcast evaluation device is realized, for example, as software, by a program loaded into memory. In the above embodiment, the configuration is described as a functional block realized by the cooperation of these hardware and software. In other words, these functional blocks can be realized in various forms by hardware only, software only, or a combination of both.

[0059] The above-described components include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the above-described configurations can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the configurations are possible within the scope of the gist of the present invention.

[0060] This disclosure includes matters that contribute to the realization of the Sustainable Development Goals (SDGs) "Build resilient infrastructure, promote inclusive and sustainable industrialization, and foster innovation" and contribute to value creation through IoT solutions. [Explanation of symbols]

[0061] 10. Disaster prevention broadcasting system 11 Operating device 12 Disaster prevention broadcast control device 13 Speaker 21 Disaster prevention broadcast evaluation device 22 Display section 31 Communication unit (data acquisition unit) 32 Storage section 33 Comparison section 34 Evaluation Department 41 Audio data comparison section 42 Time data comparison section 43 Sound quality data comparison section 51 Conversion unit 52 Voice matching calculation unit 53 Time calculation unit 54 Time coincidence calculation unit 61 Audio data evaluation unit 62 Time data evaluation unit 63 Sound quality data evaluation section 100 mobile devices 101 Microphone 102 GPS receiver 103 Clock 104 Processing section 105 Communications Department

Claims

1. a storage unit for storing reference audio data for disaster prevention broadcasts; a data acquisition unit that acquires location information of the mobile terminal and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile terminal; a comparison unit that compares the reference voice data with the recorded voice data and sets the comparison result as a score; an evaluation unit that evaluates at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the score; A disaster prevention broadcast evaluation device comprising:

2. the comparison unit has a voice matching degree calculation unit that compares the reference voice data with the recorded voice data to calculate a voice matching degree, and the evaluation unit evaluates the installation status of the speakers for the disaster prevention broadcast by obtaining a distribution between location information of the mobile terminal and the voice matching degree calculated by the voice matching degree calculation unit. The disaster prevention broadcast evaluation device according to claim 1 .

3. the comparison unit has a conversion unit that converts the recorded voice data into text sentences, and the voice matching calculation unit calculates the voice matching degree by comparing the text sentences of the reference voice data with the text sentences of the recorded voice data. The disaster prevention broadcast evaluation device according to claim 2 .

4. The storage unit stores an arrival time from an output start time of the disaster prevention broadcast from the speaker to an arrival time of the disaster prevention broadcast at the mobile terminal, the arrival time being calculated based on position information of the speaker and position information of the mobile terminal, The data acquisition unit acquires time information of a recording time when the recorded audio data of the disaster prevention broadcast is recorded by a microphone of the mobile terminal, the comparison unit includes a time calculation unit that calculates a delay time from the output start time to the recording time, and a time coincidence calculation unit that compares the arrival time with the delay time to calculate a time coincidence degree, the evaluation unit evaluates the installation status of the speakers for the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the time coincidence calculated by the time coincidence calculation unit. The disaster prevention broadcast evaluation device according to any one of claims 1 to 3.

5. The comparison unit compares the sound quality of the reference sound data with the sound quality of the recorded sound data to calculate a degree of sound quality agreement, and the evaluation unit evaluates the sound quality of the disaster prevention broadcast output from the disaster prevention broadcast by determining a distribution between the location information of the mobile terminal and the degree of sound quality agreement calculated by the comparison unit. The disaster prevention broadcast evaluation device according to any one of claims 1 to 4.

6. A disaster prevention broadcast evaluation method executed by a computer of a disaster prevention broadcast evaluation device, acquiring location information of the mobile terminal and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile terminal; a step of comparing the recorded voice data with preset reference voice data and setting the comparison result as a score; A step of evaluating at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the score; A disaster prevention broadcast evaluation method including:

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