Mobile terminals, information provision servers, information provision systems, information provision methods, and programs

Abstract

To provide a mobile terminal, information server, information system, information provision method, and program that can provide users with appropriate information according to their location without requiring them to perform complicated operations. [Solution] The mobile terminal 100 includes an acquisition unit 161 that acquires a web page from a web server, a sound wave discrimination unit 162 that executes a sound wave discrimination module included in the acquired web page to determine which sound emission device emitted the sound wave signal detected by the microphone, and a content playback unit 163 that, when it is determined which sound emission device emitted the sound wave signal detected by the microphone, refers to a correspondence table included in the acquired web page and reads from the acquired data the content corresponding to the sound emission device from which the sound wave signal was determined to have been emitted and plays it back.

Description

Technical Field

[0001] The present invention relates to a mobile terminal, an information providing server, an information providing system, an information providing method, and a program.

Background Art

[0002] Services are provided in facilities such as art museums, museums, zoos, etc. to provide content related to the facilities and exhibits via the Internet. Specifically, there is a mechanism in which two-dimensional codes are posted inside the facilities, and users can obtain content related to the facilities and exhibits by reading the two-dimensional codes using a smartphone. For example, Patent Document 1 discloses a system that plays back content in a language set in a terminal device when a two-dimensional code attached to a guide board in a museum, zoo, etc. is read by the terminal device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the system of Patent Document 1, when preparing content for each exhibit, it is necessary to read the two-dimensional code prepared individually for each exhibit each time, and there is a problem that the operation of the smartphone by the user becomes complicated. Such a problem exists not only when providing content related to each exhibit to the user, but also when providing other information to the user according to the user's position.

[0005] This invention was made against this backdrop and aims to provide a mobile terminal, information server, information system, information method, and program that can provide users with appropriate information according to their location without requiring them to perform complicated operations. [Means for solving the problem]

[0006] To achieve the above objective, the mobile terminal according to the first aspect of the present invention is: A mobile device equipped with a microphone, An acquisition unit that obtains data from an information provision server, including a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device and each content item. A sound wave discrimination unit that determines which sound emission device the sound wave signal detected by the microphone was output from by executing the sound wave discrimination module included in the acquired data, When it is determined which sound emission device the sound wave signal detected by the microphone was output from, the content playback unit refers to the correspondence table included in the acquired data and reads from the acquired data the content corresponding to the sound emission device from which the sound wave signal was determined to have been output, and plays it back. It is equipped with.

[0007] The sound wave discrimination module demodulates the device ID of the sound emission device from the sound wave signal detected by the microphone, thereby determining which sound emission device the sound wave signal detected by the microphone was output from. The aforementioned correspondence table may store the correspondence between the device ID of each sound-emitting device and each content.

[0008] The data acquired by the acquisition unit may be a web page that can be played back by the browser installed on the mobile device.

[0009] To achieve the above objective, the information provision server according to the second aspect of the present invention is: A sound wave discrimination module, a storage unit that stores data including multiple content items and a correspondence table showing the correspondence between each sound emission device and each content item, Upon receiving a transmission request from a mobile terminal, the control unit reads the data stored in the storage unit and transmits it to the mobile terminal, Equipped with, When the sound wave discrimination module is executed on the mobile terminal, it determines which sound emission device emitted the sound wave signal detected by the mobile terminal's microphone.

[0010] To achieve the above objectives, the information provision system according to the third aspect of the present invention is: Multiple sound-emitting devices installed at different locations, The aforementioned mobile device, An information provision server, upon receiving a transmission request from the aforementioned mobile terminal, reads the data stored in its memory unit and transmits it to the aforementioned mobile terminal. It is equipped with.

[0011] To achieve the above objective, the information provision method according to the fourth aspect of the present invention is: A method of providing information performed by a mobile device, The steps include obtaining data from an information provision server, which includes a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device and each content item, The steps include: determining which sound emission device emitted the sound wave signal detected by the microphone of the mobile terminal by executing the sound wave discrimination module included in the acquired data; When it is determined which sound emission device the sound wave signal detected by the microphone was output from, the following steps are taken: referencing the correspondence table included in the acquired data, reading the content corresponding to the determined sound emission device from the acquired data and playing it back; Includes.

[0012] To achieve the above objective, the program according to the fifth aspect of the present invention is: Computers, Means for obtaining data including a sound wave discrimination module, a plurality of contents, and a correspondence table indicating the correspondence between each sound emitting device and each content from an information providing server. Means for discriminating from which sound emitting device the sound wave signal detected by the microphone of the mobile terminal is output by executing the sound wave discrimination module included in the obtained data. When it is discriminated from which sound emitting device the sound wave signal detected by the microphone is output, referring to the correspondence table included in the obtained data, and reading and playing the content corresponding to the discriminated sound emitting device from the obtained data. Function as.

Advantages of the Invention

[0013] According to the present invention, it is possible to provide a mobile terminal, an information providing server, an information providing system, an information providing method, and a program that can provide appropriate information to a user according to the user's position without requiring the user to perform complicated operations.

Brief Description of the Drawings

[0014] [Figure 1] It is a diagram showing the configuration of an information providing system according to an embodiment of the present invention. [Figure 2] It is a diagram for explaining an example of the use of an information providing system according to an embodiment of the present invention. [Figure 3] It is a block diagram showing the configuration of a mobile terminal according to an embodiment of the present invention. [Figure 4] It is a diagram showing an example of the configuration of a web page according to an embodiment of the present invention. [Figure 5] It is a diagram showing an example of a correspondence table according to an embodiment of the present invention. [Figure 6] It is a block diagram showing the configuration of a web server according to an embodiment of the present invention. [Figure 7] It is a flowchart showing the flow of information providing processing executed by a mobile terminal and a web server according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the mobile terminal, information server, information system, information provision method, and program according to the present invention will be described with reference to the drawings. In each drawing, the same or equivalent parts are denoted by the same reference numerals.

[0016] The information provision system according to this embodiment is a system that provides users with appropriate information based on their location, particularly the location of a user who is a visitor to a facility. Examples of such facilities include art museums, museums, zoos, and aquariums. The information provided to users includes, for example, content such as explanations and guidance about the facility and its exhibits. This content can be expressed in various forms, such as text, still images, videos, or audio.

[0017] As shown in Figure 1, the information provision system 1 comprises a plurality of sound-emitting devices 2, a mobile terminal 100, and a web server 200. Each sound-emitting device 2 is installed near each exhibit and outputs a unique sound wave signal generated individually for each device. The mobile terminal 100 is a mobile device held by a user who is a visitor to the facility, such as a smartphone or tablet. When the mobile terminal 100 receives a sound wave signal output from a sound-emitting device 2 near an exhibit, it performs various processes according to the received sound wave signal. The web server 200 is an example of an information provision server, such as a general-purpose computer. When the web server 200 receives a request from the mobile terminal 100 to send a web page, it sends the corresponding web page to the mobile terminal 100. Both the mobile terminal 100 and the web server 200 send and receive data via a communication network 3 such as the Internet.

[0018] Next, with reference to Figure 2, the flow of information provision using the information provision system 1 will be briefly explained. In the example in Figure 2, two rooms R1 and R2 are provided within the facility. Near exhibit A displayed in room R1, one sound emission device 2A that outputs sound wave signal a is installed, and near exhibit B displayed in room R2, one sound emission device 2B that outputs sound wave signal b, which is different from sound wave signal a, is installed.

[0019] First, when a user, a visitor to the facility, operates the browser installed on their mobile device 100 and specifies a URL (Uniform Resource Locator), the mobile device 100 requests the web server 200 to send the web page stored at the specified URL. Upon receiving this request, the web server 200 reads the web page stored at the specified URL and sends it. This web page contains initial display content, a sound wave discrimination module, and content C1 and C2 corresponding to exhibits A and B. When the mobile device 100 receives the web page from the web server 200, it activates the microphone built into the mobile device 100 and displays the initial display content contained in the web page in the browser. The microphone of the mobile device 100 remains active until the browser is closed.

[0020] In this state, when the user moves to room R1 and the microphone of the mobile device 100 receives sound wave signal a, the mobile device 100 automatically plays content C1 corresponding to exhibit A in the browser. Next, when the user moves to room R2 to view a new exhibit B and the microphone of the mobile device 100 receives sound wave signal b in room R2, the mobile device 100 automatically plays content C2 corresponding to exhibit B in the browser. Therefore, once the user has operated the mobile device 100 to load the web page, they can then simply move near exhibits A and B to sequentially display the corresponding content C1 and C2 in the browser. The above describes the flow of information provision using Information Provision System 1.

[0021] Next, the various components of the information provision system 1 according to the embodiment will be described. The sound emission device 2 is a device that repeatedly outputs sound wave signals stored in memory at a fixed period. The sound emission device 2 comprises, for example, a speaker and a computer. The computer comprises at least memory and a processor, and the memory stores a device ID (Identification) that is individually assigned to each sound emission device 2. The device ID is an example of identification information for identifying the sound emission device 2.

[0022] The computer in the sound emission device 2 executes a program stored in memory, performs a D / A (digital-to-analog) conversion of the device ID stored in memory, modulates the carrier wave with this converted signal, and sends the modulated carrier wave (sound wave signal) to the speaker for output. For the carrier wave modulation process, known processes used in wireless communication, such as amplitude modulation or frequency modulation, may be used. Furthermore, the sound wave signal output from the speaker of the sound emission device 2 should be pre-adjusted to a volume that can be collected only in a limited space, such as a room.

[0023] As shown in Figure 3, the mobile terminal 100 comprises an operation unit 110, a display unit 120, a sound collection unit 130, a communication unit 140, a storage unit 150, and a control unit 160. Each part of the mobile terminal 100 is connected to each other via an internal bus so that they can communicate with one another.

[0024] The operation unit 110 receives user input and supplies operation signals corresponding to the received input to the control unit 160. The display unit 120 displays various images and screens based on data supplied from the control unit 160. The operation unit 110 and the display unit 120 are integrated, for example, by a touch panel. The touch panel displays an operation screen that accepts user input and supplies operation signals corresponding to the position where the user makes a contact operation on the operation screen to the control unit 160.

[0025] The sound collection unit 130 is equipped with a microphone 131, which collects sound wave signals and converts them into electrical signals. The electrical signals are then A / D (analog / digital) converted and the digital signals are supplied to the control unit 160.

[0026] The communication unit 140 is an interface that, under the control of the control unit 160, can send and receive data to and from, for example, a web server 200.

[0027] The storage unit 150 includes, for example, RAM (Random Access Memory), ROM (Read Only Memory), and flash memory. The storage unit 150 stores programs, web pages, and other data executed by the control unit 160, and also temporarily stores various types of data, functioning as work memory for the operation of the control unit 160.

[0028] As shown in the example in Figure 4, the web page includes initial display content, multiple content C1, C2, ..., a sound wave discrimination module, and a correspondence table. The initial display content is the content that is displayed on the browser when the mobile terminal 100 receives the web page. The initial display content is also displayed on the browser when the mobile terminal 100 is unable to collect the sound wave signal output from the sound emission device 2 with the microphone 131.

[0029] The sound wave discrimination module is a program that the control unit 160 of the mobile terminal 100 executes in order to discriminate the sound wave signal collected by the microphone 131. The sound wave discrimination module is stored in the memory unit 150 of the mobile terminal 100 and, when executed by the control unit 160, demodulates the device ID carried on the sound wave signal and identifies the sound-emitting device 2 that output the sound wave signal. For the demodulation process of the sound wave signal, known processes used in wireless communication may be used.

[0030] The correspondence table is a data table that stores the correspondence between sound wave signals output from sound emission devices 2 installed near exhibits and the content C1, C2, ... that explains the exhibits. As shown in Figure 5, the correspondence table stores, for example, the device ID of each sound emission device 2 and the correspondence between the content C1, C2, ... that explains the exhibits corresponding to each sound emission device 2.

[0031] Returning to Figure 3, the control unit 160 includes a processor and controls various parts of the mobile terminal 100. The processor is, for example, a CPU (Central Processing Unit). The control unit 160 executes the information provision process shown in Figure 7 by running the program stored in the memory unit 150. Functionally, the control unit 160 includes an acquisition unit 161, a sound wave discrimination unit 162, and a content playback unit 163.

[0032] The acquisition unit 161 receives user input from the operation unit 110 and requests the Web server 200 to send a web page. Specifically, the acquisition unit 161 launches a browser installed on the mobile terminal 100 based on the user's input and requests the Web server 200 to send a web page by specifying a URL in the browser. The acquisition unit 161 also acquires the web page from the Web server 200 and stores it in the storage unit 150.

[0033] The sound wave discrimination unit 162 determines which sound emission device 2 the sound wave signal detected by the microphone 131 was output from by executing the sound wave discrimination module included in the web page. Specifically, the sound wave discrimination unit 162 activates the microphone 131 when it obtains the web page from the web server 200. The microphone 131 is kept running at all times until the browser is closed. Next, the sound wave discrimination unit 162 periodically attempts to demodulate the device ID from the sound wave signal detected by the microphone 131 by executing the sound wave discrimination module, and if the demodulation of the device ID is successful, it determines which device ID registered in the web page's correspondence table corresponds to this device ID.

[0034] The content playback unit 163 reads initial display content from the web page and plays it in the browser when the web page is acquired by the acquisition unit 161. The content playback unit 163 also reads content from the web page and plays it in the browser based on the sound wave discrimination result of the sound emission device 2 by the sound wave discrimination unit 162. Specifically, when the content playback unit 163 determines which sound emission device emitted the sound wave signal detected by the microphone 131, it refers to the correspondence table contained in the web page and reads the content corresponding to the sound emission device 2 that was determined to have emitted the sound wave signal from the web page and displays it in the browser.

[0035] When displaying content related to an exhibit in a browser, the content playback unit 163 determines which sound emission device 2 the sound wave signal detected by microphone 131 originated from, and performs the following processing according to the result: If the latest device ID demodulated from the sound wave signal matches the device ID demodulated immediately before, the content displayed in the browser is not updated and continues to be displayed as is. If the latest device ID demodulated from the sound wave signal does not match the device ID demodulated immediately before, the content displayed in the browser is updated to match the content corresponding to the latest sound wave signal. If the device ID cannot be demodulated from the sound wave signal, the content displayed in the browser is reverted to the initial display content. The above describes the configuration of the mobile device 100.

[0036] As shown in Figure 6, the Web server 200 comprises a communication unit 210, a storage unit 220, and a control unit 230. Each part of the Web server 200 is connected to each other via an internal bus so that they can communicate with one another.

[0037] The communication unit 210 is an interface capable of sending and receiving wired or wireless signals according to the control of the control unit 230. The communication unit 210 is communicated with, for example, the communication unit 140 via the communication network 3.

[0038] The memory unit 220 includes, for example, RAM, ROM, and flash memory. The memory unit 220 stores programs and various data to be executed by the control unit 230, as well as temporarily stores various data and functions as work memory for the operation of the control unit 230. Furthermore, the memory unit 220 stores web pages to be sent to the mobile terminal 100 in association with a pre-set URL.

[0039] The control unit 230 is equipped with a processor and controls various parts of the Web server 200. The processor is, for example, a CPU. The control unit 230 executes the information provision process shown in Figure 7 by executing a program stored in the memory unit 220. Specifically, when it receives a request to send a Web page from the mobile terminal 100, it reads the Web page stored in the memory unit 220 and sends it to the mobile terminal 100. The above describes the configuration of Web Server 200.

[0040] (Information processing) Next, referring to the flowchart in Figure 7, we will explain the sequence of information provision processing performed collaboratively by the mobile terminal 100 and the web server 200. Information provision processing is the process of playing content containing appropriate information for the user's location on the mobile terminal 100.

[0041] First, the user possessing the mobile terminal 100 launches the browser installed on the mobile terminal 100 and specifies the URL containing the web page introducing the exhibits. To specify the URL, for example, one can scan a QR code that is printed on a brochure or poster, or displayed on an information panel at the facility. Upon receiving the user's input, the acquisition unit 161 of the mobile terminal 100 requests the web server 200 to send the web page stored at the specified URL (step S11).

[0042] When the control unit 230 of the web server 200 receives a request from the mobile terminal 100 to send a web page (step S21), it sends the web page with the specified URL to the mobile terminal 100 (step S22) and terminates the process.

[0043] When the acquisition unit 161 of the mobile terminal 100 receives a web page (step S12), the sound wave discrimination unit 162 activates the microphone 131 to receive sound wave signals from the sound emission device 2 (step S13). The microphone 131 remains activated until the browser is closed. Next, the content playback unit 163 displays the initial display content contained in the web page on the display unit 120 (step S14).

[0044] Next, the sound wave discrimination unit 162 determines whether a sound wave signal has been received from any of the sound emitting devices 2 by executing a sound wave discrimination module that demodulates the device ID from the sound wave signal detected by the microphone 131 (step S15). Specifically, it attempts to demodulate the device ID from the sound wave signal detected by the microphone 131, and if the demodulation of the device ID is successful, it can determine that a sound wave signal output by any of the sound emitting devices 2 has been received. If multiple device IDs can be demodulated, the device ID corresponding to the strongest sound wave signal is given priority.

[0045] If it is determined that a sound wave signal has been received from any of the sound emission devices 2 (step S15; Yes), the content playback unit 163 refers to the correspondence table of web pages stored in the storage unit 220, reads the content corresponding to the device ID demodulated from the sound wave signal from the web page and displays it in the browser (step S16), and then returns to the process in step S15 after a certain period of time has elapsed. In the process in step S16, if the latest demodulated device ID matches the device ID demodulated immediately before, the content displayed in the browser is left as is. If the latest demodulated device ID does not match the device ID demodulated immediately before, the content displayed in the browser is updated to match the content corresponding to the latest sound wave signal.

[0046] On the other hand, if it is determined that no sound wave signals have been received from any of the sound emission devices 2 (step S15; No), the content playback unit 163 returns the content displayed in the browser to the initial display content (step S14), and then executes the process of step S15 after a certain period of time has elapsed.

[0047] The information provision process shown in Figure 7 ends when the user closes the browser by operating the mobile terminal 100. At this time, the sound wave discrimination unit 162 of the mobile terminal 100 also stops the operation of the microphone 131. The above outlines the information provision and processing flow.

[0048] As described above, the mobile terminal 100 according to the embodiment includes: an acquisition unit 161 that acquires a web page from a web server 200 that includes a sound wave discrimination module, multiple contents, and a correspondence table showing the correspondence between each sound-emitting device and each content; a sound wave discrimination unit 162 that determines which sound-emitting device 2 the sound wave signal detected by the microphone 131 was output from by executing the sound wave discrimination module included in the acquired web page; and a content playback unit 163 that, when it is determined which sound-emitting device 2 the sound wave signal detected by the microphone 131 was output from, refers to the correspondence table included in the acquired web page and reads from the acquired data the content corresponding to the sound-emitting device 2 from which the sound wave signal was determined to have been output and plays it back.

[0049] Therefore, with the mobile terminal 100 according to this embodiment, once a user opens a web page, the mobile terminal 100 can automatically play content corresponding to each exhibit even in areas with poor radio wave conditions. Furthermore, since the collection of sound wave signals by the mobile terminal 100 is used as a trigger for content playback, it is possible to provide content to a large number of people simultaneously, while also limiting the range of users to whom content is provided.

[0050] Furthermore, the mobile terminal 100 according to this embodiment uses an installed browser to execute the sound wave discrimination module and display the content. Therefore, there is no need to install a dedicated application, which lowers the barrier to use.

[0051] Furthermore, the present invention is not limited to this, and the following modifications are also possible.

[0052] (modified version) In the above embodiment, the device ID was stored in the memory of the sound emission device 2, and the carrier wave was modulated using the device ID when outputting the sound wave signal. However, the present invention is not limited to this. For example, data related to the carrier wave (sound wave signal) modulated using the device ID may be stored in the memory of the sound emission device 2, and the data related to the carrier wave may be sent to the speaker to produce sound.

[0053] In the above embodiment, the sound wave signal was not encrypted, but the present invention is not limited thereto. To prevent the reuse of the sound wave signal through recording, the sound wave signal may be encrypted. For example, the sound emission device 2 may generate a one-time sound wave signal each time using the device ID in addition to the time of sound wave signal generation.

[0054] Furthermore, if it is necessary to ensure the security of the system, the sound emitter 2 may output an encrypted sound wave signal containing the device ID, the mobile terminal 100 may demodulate the encrypted device ID, the web server 200 may decrypt the demodulated device ID for authentication, and the decrypted device ID may be returned to the mobile terminal 100. This encrypted sound wave signal may be used in conjunction with an unencrypted sound wave signal. For example, by requiring the web server 200 to authenticate the sound wave signal only once after the web page is displayed, and then using an unencrypted sound wave signal thereafter, security can be ensured even in areas with poor radio wave environments.

[0055] In the above embodiment, a device ID was used to generate the sound wave signal, but the present invention is not limited thereto. For example, the system may be configured to emit sound wave signals of different frequencies from each sound-emitting device 2 without using a device ID. In this case, the correspondence table may store the frequency of the sound wave in the memory of the sound-emitting device 2 instead of the device ID, and the control unit 160 of the mobile terminal 100 may calculate the frequency of the sound wave signal collected by the microphone 131.

[0056] In the above embodiment, when the mobile terminal 100 receives a web page, it first activates the microphone 131 and then displays the initial display content on the browser. However, the present invention is not limited to this. The initial display content may be displayed on the browser first, and then the microphone 131 may be activated, or the display of the initial display content may be omitted.

[0057] In the above embodiment, sound wave signals were output from a sound-emitting device 2 installed near the exhibit, but the present invention is not limited to this. For example, the sound-emitting device 2 may be replaced with a speaker installed on the wall or ceiling of the facility. In this case, inaudible sound wave signals may be output simultaneously from the speaker along with other announcements.

[0058] In the above embodiment, one sound-emitting device 2 was installed in one room, but the present invention is not limited to this. For example, if there are multiple exhibits in one room, one sound-emitting device 2 can be installed for each exhibit.

[0059] In the above embodiment, the mobile terminal 100 was a smartphone or a tablet device, but the present invention is not limited to these. The mobile terminal 100 may be another device equipped with a microphone, such as a wearable device like a smartwatch.

[0060] In the above embodiment, a web page was downloaded using a browser installed on the mobile terminal 100, but the present invention is not limited to this. For example, a web page may be downloaded using an application installed on the mobile terminal 100. In this case, a sound wave discrimination module may be incorporated into the application.

[0061] In the above embodiment, a Web server 200 was used as the information providing server to transmit Web pages, but the present invention is not limited thereto. The information providing server may transmit other forms of data, including a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device 2 and each content item.

[0062] In the above embodiment, the memory of the sound emission device 2, the storage unit 150 of the mobile terminal 100, and the storage unit 220 of the Web server 200 stored various data, but the present invention is not limited thereto. For example, all or part of the various data used in the above processing may be stored on an external computer via the communication network 3.

[0063] In the above embodiment, the sound emission device 2, the mobile terminal 100, and the web server 200 operated based on programs stored in memory and storage units 150 and 220, but the present invention is not limited thereto. For example, a functional configuration realized by a program may be realized by hardware.

[0064] In the above embodiment, the processing performed by the sound emission device 2, the mobile terminal 100, and the web server 200 was realized by the device having the above-described physical configuration executing a program stored in the memory or storage units 150 and 220. However, the present invention may be realized as a program, or as a storage medium on which that program is recorded.

[0065] Alternatively, a device that performs the above-mentioned processing operations may be configured by distributing a program for executing the above-mentioned processing operations on a computer-readable recording medium such as a flexible disk, CD-ROM (Compact Disk Read-Only Memory), DVD (Digital Versatile Disk), or MO (Magneto-Optical Disk), and installing that program on a computer.

[0066] The embodiments described above are illustrative, and the present invention is not limited thereto. Various embodiments are possible without departing from the spirit of the invention as described in the claims. The components described in the embodiments and modifications can be freely combined. Furthermore, inventions equivalent to the invention described in the claims are also included in the present invention. [Explanation of symbols]

[0067] 1. Information Provision System 2,2A,2B Sound emitting device 3. Communication Network 100 mobile devices 200 Web Servers 110 Operation section 120 Display section 130 Sound collection section 131 Mike 140,210 Communications Department 150,220 storage section 160,230 Control Unit 161 Acquisition Department 162 Sound wave discrimination unit 163 Content Playback Section

Claims

1. A mobile device equipped with a microphone, An acquisition unit that obtains data from an information provision server, including a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device and each content item. A sound wave discrimination unit that determines which sound emission device the sound wave signal detected by the microphone was output from by executing the sound wave discrimination module included in the acquired data, When it is determined which sound emission device the sound wave signal detected by the microphone was output from, the content playback unit refers to the correspondence table included in the acquired data and reads from the acquired data the content corresponding to the sound emission device from which the sound wave signal was determined to have been output, and plays it back. A mobile device equipped with the following features.

2. The sound wave discrimination module demodulates the device ID of the sound emission device from the sound wave signal detected by the microphone, thereby determining which sound emission device the sound wave signal detected by the microphone was output from. The aforementioned correspondence table stores the correspondence between the device ID of each sound-emitting device and each content. The mobile terminal according to claim 1.

3. The data acquired by the acquisition unit is a web page that can be played back by the browser installed on the mobile device. The mobile terminal according to claim 1.

4. A sound wave discrimination module, a storage unit that stores data including multiple content items and a correspondence table showing the correspondence between each sound emission device and each content item, Upon receiving a transmission request from a mobile terminal, the control unit reads the data stored in the storage unit and transmits it to the mobile terminal, Equipped with, When the sound wave discrimination module is executed on the mobile terminal, it determines which sound emission device emitted the sound wave signal detected by the mobile terminal's microphone. Information server.

5. Multiple sound-emitting devices installed at different locations, A mobile terminal according to any one of claims 1 to 3, An information provision server, upon receiving a transmission request from the aforementioned mobile terminal, reads the data stored in its memory unit and transmits it to the aforementioned mobile terminal. An information provision system equipped with the following features.

6. A method of providing information performed by a mobile device, The steps include obtaining data from an information provision server, which includes a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device and each content item, The steps include: determining which sound emission device emitted the sound wave signal detected by the microphone of the mobile terminal by executing the sound wave discrimination module included in the acquired data; When it is determined which sound emission device the sound wave signal detected by the microphone was output from, the following steps are taken: referencing the correspondence table included in the acquired data, reading the content corresponding to the determined sound emission device from the acquired data and playing it back; Information provision methods including those mentioned above.

7. Computers, A means for obtaining data from an information provision server, including a sound wave discrimination module, multiple content items, and a correspondence table showing the correspondence between each sound emission device and each content item. A means for determining which sound emission device emitted the sound wave signal detected by the microphone of a mobile device by executing the sound wave discrimination module included in the acquired data. When it is determined which sound emission device the sound wave signal detected by the microphone was output from, a means for reading and playing back content corresponding to the determined sound emission device from the acquired data by referring to the correspondence table included in the acquired data. A program designed to function as such.

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