JP5435782B2 - Noise level analysis result notification system - Google Patents

Description

  According to the present invention, in a partitioned area such as a restaurant, noise is generated in a section determined to be noisy by analyzing the noise level of conversations and other sounds generated by customer groups in each section. The present invention relates to a noise level analysis result notification system.

  In a store or facility where a large number of people gather, such as restaurants and libraries, when a customer uses a group, the conversation, applause, and other sounds of the customer group may cause noise and disturb other people. In particular, in a facility without a private room, even if the tables are partitioned by partitions or the like, the sound may spread to other areas by generating a loud voice. In addition, the higher the story, the more people become unaware of others and the louder the spoken voice becomes, the more likely it can ruin other people's precious meals and conversations or reading. Of course, it is important for other customers and employees to be jealous of such a customer group, but it can lead to a harsh mood between employees and customers, or between customers, and the level of noise is considerable. There was a problem with attention if it wasn't "too much".

  By the way, the loudness (noise level) is quantitatively expressed by “noise level (dB, phone, etc.)”. For example, a volume of 80 dB or more is felt loud, and when it becomes 100 dB or more, it is very noisy and “noise”. It is said that. However, “noise” such as conversation is not caused by the absolute noise level as described above but is caused by the relative noise level. That is, in a relatively noisy facility such as a tavern, even a noise level that is not particularly noticeable may be considerable in a relatively quiet facility such as a restaurant or library. In addition, the degree of sound volume that is felt as noise varies depending on the time zone and season of the day, not limited to such differences between facilities. Specifically, the volume may be unpleasant at noon or in the evening when there is a lot of people coming and going, but it may be felt at early morning or late at night, and the same noise may be the difference between busy and quiet periods or on the day of the week. There are cases where noise is generated even at a level, and noise is not generated. Such noise caused by conversations not only inconveniences others, but also has a negative impression on the facility service, which may adversely affect the operation of stores and facilities. However, at present, a system that actively solves such a problem has not yet been disclosed, and it is necessary to rely on human attention.

  Further, a system has been proposed that measures a noise level and issues an alarm when the noise level is equal to or higher than a certain noise level (see, for example, Patent Document 1 and Patent Document 2). The prior art described in Patent Document 1 measures the volume of sound leaked from a room to a neighboring room through the wall or floor in an apartment house where a plurality of rooms are adjacent to each other across walls and floors. When the volume of the sound exceeds a certain value, an indicator lamp installed in the room is turned on to alert the user. Further, the prior art described in Patent Document 2 is a system that notifies the caller of warning information when the volume of the caller's voice exceeds a certain value during a call on a mobile phone or the like. is there.

JP 2008-122852 A JP 2001-268168 A

  However, the prior art described in Patent Document 1 warns against sound leakage between rooms adjacent to each other by a floor or a wall surface, and considers the overall noise level in an open space such as a restaurant or a library. It was not designed to deal with a large number of customer groups individually. Moreover, the noise level is not dynamically or relatively analyzed in consideration of the time zone in an open space.For example, if a noise level reference value is set in accordance with the daytime noise level, In the middle of the night, you will not be alerted to sounds that you are worried about. On the other hand, if you set the reference value to the noise level in the morning or in the middle of the night, you may be unnecessarily alerted during the day. . The prior art described in Patent Document 2 issues a warning when the volume of a caller on a mobile phone exceeds a certain value, and in the open space as in the prior art described in Patent Document 1. It was not considering the overall noise level.

  The present invention has been proposed in view of the above-described circumstances. In a store or facility where a large number of people gather, such as restaurants and libraries, the volume generated by each section (for example, for each table) is acquired, and relatively noise is obtained. An object of the present invention is to provide a noise level analysis result notifying system that automatically notifies that noise is generated when the level of the conversation, etc. is excessive and the noise level is excessive. . In particular, it is an object of the present invention to suitably notify the generation of noise due to conversation or the like by dynamically changing the reference noise level while taking into account the current noise level in stores and facilities.

The noise level analysis result notification system of the present invention has the following features in order to achieve the above-described object. That is, the noise level analysis result notification system of the present invention divides the volume analysis target area, which is an open space, into a plurality of sections, collects volume data of each section, and based on the volume data, Calculates the noise level and responds individually to a large number of customer groups according to the overall noise level in the open space, and reports that noise is occurring in sections where the noise level is above the threshold. And a sound level data acquisition unit, a noise level calculation unit, a threshold setting unit, a noise determination unit, and a notification control unit.

The section-specific volume data acquisition means is provided for each section, and is means for acquiring volume data generated from the section. The noise level calculation means is a means for analyzing the acquired volume data of each section and calculating the noise level of each section. The threshold value setting means is a means for calculating and setting a threshold value with a predetermined arithmetic expression based on the current noise level for each section calculated by the noise level calculation means.

  The noise determination means is a means for determining whether the calculated noise level is greater than or equal to a predetermined threshold value for each section. When the noise level is determined to be greater than or equal to a threshold value for an arbitrary section, the notification control means controls to notify the notification device provided in the section that noise is occurring. It is means of.

Moreover, you may further provide the volume data acquisition means according to area. The area-specific volume data acquisition means is a means for acquiring volume data of each area, arranged for each area composed of one or a plurality of sections in the volume analysis target area. When the area-specific volume data acquisition unit is provided, the noise level calculation unit analyzes the acquired volume data of each area to calculate the noise level of each area, and the threshold setting unit calculates Based on the current noise level for each area, a threshold value is calculated and set using a predetermined arithmetic expression.

Further, the threshold setting means may refer to a correction value table in which correction values are set for each time , perform correction based on the correction values set in the correction value table, and set the threshold.

  In the noise level analysis result notification system of the present invention, in an area to be a customer floor of a store or facility where a large number of people gather such as restaurants and libraries, these areas are divided into a plurality of sections, and the volume generated by each section After acquiring the data and analyzing the noise level relatively, noise is generated in a section where the conversation between customers is excessive, that is, a section where the noise level (threshold) is higher than the reference level. Automatically notify you. As a result, at the store or facility, the group's customers can be automatically recognized that the group's conversation is annoying other customers and employees. , It is no longer necessary to pay attention to the group of customers who are engaged in conversation, so that it is not necessary to give a harsh mood between employees and customers or between customers. It is possible to enjoy meals, conversations and reading comfortably.

  In addition, based on the calculated noise level, with a configuration including a threshold setting means for calculating and setting a threshold with a predetermined arithmetic expression, while considering the current noise situation in the store or facility, It is possible to suitably change the noise level (threshold value) serving as a reference so that the occurrence of noise due to conversation or the like can be suitably notified.

  In addition, by adopting a configuration provided with area-specific volume data acquisition means for acquiring volume data of an area composed of a plurality of sections, it is possible to acquire volume data for each area and calculate the noise level, further. It is possible to appropriately grasp the noise generation status.

  Further, by setting the threshold value based on the correction value set for each time, it becomes possible to set the reference noise level (threshold value) more appropriately, for example, like a tavern In the store, the occurrence of noise due to the conversation of the customer can be informed in consideration of the night time when there are relatively many customers visiting the store, the time when there are few customers visiting the store, etc.

Explanatory drawing which shows the structure of the noise level result alerting | reporting apparatus to which the noise level analysis result alerting | reporting system which concerns on embodiment of this invention is applied. Explanatory drawing which shows the specific example of the noise level analysis result alerting | reporting system which concerns on embodiment of this invention. The flowchart which shows the noise level analysis result alerting | reporting process using the noise level analysis result alerting | reporting system which concerns on embodiment of this invention. Explanatory drawing which shows the calculation procedure of the threshold value used with the noise level analysis result alerting | reporting system which concerns on embodiment of this invention. Explanatory drawing which shows the data structure of the correction value table used with the noise level analysis result alerting | reporting system which concerns on embodiment of this invention.

<Outline of noise level analysis result notification system>
Hereinafter, an embodiment of a noise level analysis result notification system of the present invention will be described with reference to the drawings. The noise level analysis result notifying system according to the embodiment of the present invention analyzes the noise level of each section by measuring volume data such as conversation for each section, and the noise level for the section whose noise level is equal to or higher than a threshold value. This is a system for informing that the occurrence has occurred. In the embodiment described below, as illustrated in FIG. 2, the description will be made assuming a store 100 of a tavern where a plurality of tables are arranged at a predetermined interval on one floor as a volume analysis target region.

<Noise level analysis result notification device>
FIG. 1 is an explanatory diagram showing a configuration of a noise level analysis result notification device to which a noise level analysis result notification system according to an embodiment of the present invention is applied, and FIG. 2 is a noise level analysis result notification system according to an embodiment of the present invention. It is explanatory drawing which shows the specific example.

  As shown in FIG. 1, a noise level analysis result notification device 10 to which a noise level analysis result notification system according to an embodiment of the present invention is provided includes a device body 11, a noise meter 30 for each section, and a notification device 34. Moreover, when acquiring the sound volume of the whole store in a lump, the area-specific sound level meter 35 may be further provided. The noise level analysis result notification system of the present embodiment may be configured as a single unit as the noise level analysis result notification device 10 using a computer, or may be configured as incidental equipment such as a store management system. There may be.

<Main unit>
The apparatus body 11 includes a central control unit 12, a ROM 13, a RAM 14, an HDD (a database is formed in a predetermined storage area) 15, a timer 16, a bus 17, a volume data acquisition unit 20 for each section, a noise level calculation unit 21, and a threshold setting unit. 22, a noise determination unit 23 and a notification control unit 24 are provided. Further, as described above, when the sound volume of the entire store is acquired at once using the area-specific sound level meter 35, the sound volume data acquiring means 25 for each area is further provided. In addition to this, input means such as a keyboard and display means such as a display may be provided, and the threshold value and the correction value α can be set and maintained while checking the contents of the HDD 15 with the display means. Good.

<Central control means>
The central control means 12 is a means for comprehensively controlling the apparatus main body 11 and is constituted by, for example, a CPU and its peripheral devices, and is controlled by the CPU or the like operating according to a program stored in the ROM 13 or the like. The function can be demonstrated.

<ROM / RAM>
The ROM 13 is a device for storing program data and numerical data for controlling each device constituting the apparatus main body 11, and is configured by a semiconductor memory, for example. The RAM 14 functions as a temporary storage area for temporarily storing programs and various types of data, and is composed of, for example, a semiconductor memory. Note that the virtual RAM 14 may be configured using a hard disk storage device or the like instead of configuring the RAM 14 with a physical semiconductor memory.

  In the present embodiment, the RAM 14 is provided with a volume data storage area 141, a noise level storage area 142, and a threshold storage area 143. The volume data storage area 141 stores volume data acquired in each section. Further, when obtaining volume data for each area, the volume data is also stored. The noise level storage area 142 stores the noise level calculated by analyzing the acquired volume data of each section. Further, when obtaining volume data for each area, the noise level calculated by analyzing the volume data is also stored. The threshold storage area 143 stores a noise level that is a reference for determining whether the noise level is noise, that is, a threshold. Note that the volume data, noise level, and threshold value may be stored in the HDD 15 instead of the RAM 14.

<HDD / correction value table>
The HDD 15 stores a correction value table 151. The correction value table 151 may be stored in the RAM 14 instead of the HDD 15.

  The correction value table 151 is a table in which a day is divided into predetermined time zones, and a correction value α is set for each time zone. The correction value table 151 has a data structure as shown in FIG. 5 and includes a time zone setting area 151a, And a correction value setting area 151b.

  As a method for setting the correction value α in the correction value table 151, in the present embodiment, the volume data for one day in the store is acquired in advance for each time zone, and based on the noise level obtained from the volume data, The system is configured such that the correction value α for each time zone is calculated and automatically set in the correction value table 151. The calculation and setting of the correction value α in the correction value table 151 may be performed when the system is introduced, or may be incorporated in the system schedule so as to be performed periodically every month and every season.

  As another different embodiment, a store manager, a system manager, or the like may be configured to set the correction value α using an input means such as a keyboard. Further, in the present embodiment, only one correction value table 151 is provided, but a plurality of correction values α are set for each month and season, such as during summer holidays, busy seasons such as Christmas, and off seasons when the season is off. The correction value table may be included. In this embodiment, a time zone is defined as a day divided by a predetermined time, but the concept of the time zone is not limited to this, and is divided into predetermined days, months, seasons, and years. It may be what you did.

<Volume data acquisition means by section>
The section-specific volume data acquisition means 20 includes an electronic circuit and a program for receiving the volume data for each section acquired by the section-level sound level meter 30. The section is a volume analysis target area, that is, the area formed by dividing the store 100 into a plurality of parts, and in this embodiment, as shown in FIG. 2, eight tables installed in the store 100 are used. It is assumed that there are eight partitions A to H that are formed for each seat and have no partition. However, each of the sections A to H may be partitioned by a partition. The acquired volume data of the sections A to H is stored in the volume data storage area 141 of the RAM 14.

<Noise level calculation means>
The noise level calculation means 21 includes an electronic circuit and a program for analyzing the volume data of each section acquired by the section-specific volume data acquisition means 20 and calculating the noise level of each section. Specifically, it refers to a process of replacing the physical volume data acquired by the zone-specific sound level meter 30 with dB, a phone, or a user's arbitrary intensity (numerical value). In this embodiment, the noise level is expressed in dB. The calculated noise levels of the sections A to H are stored in the noise level storage area 142 of the RAM 14. When the area-specific volume data acquisition unit 25 is provided, the volume level acquired for each area is analyzed to calculate the noise level. The noise level for each area is also stored in the noise level storage area 142 of the RAM 14.

<Threshold setting means>
The threshold setting unit 22 includes an electronic circuit and a program for calculating and setting a threshold with a predetermined arithmetic expression based on the noise level of each section calculated by the noise level calculating unit 21. Specifically, the average value of the noise level is calculated based on the noise level for each section. Then, the threshold value is calculated by adding the correction value α acquired from the correction value table 151 to the average value. The calculated threshold value is stored in the threshold value storage area 143 of the RAM 14.

<Noise judgment means>
The noise determination means 23 is composed of an electronic circuit and a program for determining whether the calculated noise level is equal to or higher than a predetermined threshold value for each section. The noise determination unit 23 determines that a noise level equal to or higher than a threshold value is noise.

<Notification control means>
When the noise determination unit 23 determines that the noise level is equal to or higher than the threshold value for any section, the notification control unit 24 indicates that noise is generated for the notification device 34 provided in the section. It consists of an electronic circuit and a program for controlling to notify.

<Volume data acquisition means by area>
The area-specific volume data acquisition unit 25 includes an electronic circuit and a program for receiving volume data acquired by the area-specific sound level meter 35 provided in the store 100. Only one noise meter 35 by area may be provided in the store 100, or may be arranged for each area composed of a plurality of sections when the store 100 is large. When arranging for each area, for example, as shown in FIG. 2, the volume data of the areas of the sections A to C are acquired by the area-specific sound level meter 35 a connected to the apparatus main body 11 by wire, and other areas ( The volume data of the sections D to H) is acquired by the area-specific sound level meter 35b wirelessly connected to the apparatus main body 11. In this case, the volume data acquisition unit 25 by area calculates the average value by summing the volume data acquired by the two area-specific sound level meters 35a and 35b, and adopts this average value as the volume data of the entire store 100. Alternatively, the louder one or the louder sound may be adopted. The acquired volume data of each area is stored in the volume data storage area 141 of the RAM 14.

  In the present embodiment, the noise level calculation unit 21 calculates the noise level based on the volume data for each section acquired by the section-specific volume data acquisition unit 20, and then the threshold setting unit 22 calculates the noise level. Although the threshold is set based on the level, as another different embodiment, the noise is based on the volume data of the entire store 100 acquired by the volume data acquisition unit 25 by area without using the volume data for each section. After calculating the level, a threshold may be set based on the noise level. Or after calculating a noise level based on both the volume data for every division and the volume data of the store 100 as a whole, a threshold value may be set based on this noise level.

<Sound level meter by section>
The sound level meter 30 for each section is provided for each section and is a device for acquiring volume data of each section. In the present embodiment, as shown in FIG. 2, the sound level meters 30 a to 30 h for each section are provided in each table of the sections A to H. In the present embodiment, a general sound level meter that expresses sound in dB is used as the sound level meter 30 according to each section. However, the present invention is not limited to this, and the sound generated in each section is collected. As long as sound volume data can be acquired, any conventionally known data may be used.

<Informing device>
The notification device 34 is a device for informing the customer in the section that noise has occurred based on the notification control signal from the notification control means 24. Specifically, for example, a speaker 341 that informs by a buzzer sound or voice may be used, or an LED or other light source 342 that informs by flashing light, or a character string or a graphic is displayed for notification. The screen 343 may be used. As this screen 343, a touch panel for selecting a food / beverage menu can be used. In addition, the speaker 341, the light source 342, and the screen 343 may be used alone, or a plurality of them may be used in combination, such as flashing sound and light, or notifying by sound and character string. In the present embodiment, as shown in FIG. 2, such notification devices 34 a to 34 h are provided in the tables of the sections A to H, respectively.

<Sound level meter by area>
The area-specific sound level meter 35 is a device that divides the interior of the store 100 into one or a plurality of sections, and is arranged in each area to collectively acquire volume data of the entire room. The area-specific sound level meter 35 is also a general sound level meter that expresses sound in dB. However, the present invention is not limited to this, and the sound in the store 100 is collected to obtain volume data. Any known one may be used as long as it can be obtained. FIG. 2 shows an example in which two area-specific sound level meters 35a and 35b are set as described in the description of the area-specific volume data acquisition means 25.

<Noise level analysis result notification processing>
Next, the process of the noise level analysis result notification process using the noise level analysis result notification system according to the embodiment of the present invention will be described. FIG. 3 is a flowchart showing a noise level analysis result notification process using the noise level analysis result notification system according to the embodiment of the present invention, FIG. 4 is an explanatory diagram showing a threshold calculation procedure, and FIG. 5 is a correction value table. It is explanatory drawing which shows a data structure.

  As shown in FIG. 2, a noise level analysis result notification device 10 (device main body 11) to which a noise level analysis result notification system is applied is installed in a store 100 such as a pub. When there are a plurality of stores 100, the noise level analysis result notification device 10 may be installed on each floor, or all floors are controlled by one noise level analysis result notification device 10. May be. Further, the store 100 is divided into eight sections A to H for each table, and each table is provided with section-specific sound level meters 30a to 30h and notification devices 34a to 34h. Data can be exchanged with the main body 11. The areas A to C are provided with area-specific sound level meters 35a connected to the apparatus main body 11 in a wired manner, and the areas D to H are connected to the apparatus main body 11 by radio signal transmission / reception means. An area-specific sound level meter 35b is provided, and data transmission / reception with the apparatus main body 11 is possible.

  In the noise level analysis result notifying process using the noise level analysis result notifying system of the present embodiment, as shown in FIG. 3, the volume data acquisition unit 20 for each section is divided into sections A to H by the section-specific sound level meters 30 a to 30 h. Volume data for each is acquired and stored in the volume data storage area 141 of the RAM 14 (S1). Note that volume data acquisition may be performed by turning on the switch of the sound level meter 30 by section only for a table where a customer is present, and volume data may not be acquired for a table where there is no customer. Based on the volume data of each section acquired by the section-specific volume data acquisition means 20, the noise level calculation means 21 calculates the noise level for each section and stores it in the noise level storage area 142 of the RAM 14 (S2). . In the present embodiment, the section-specific sound level meters 30a to 30h that represent the sound in dB are used, and the numerical value (dB) acquired by these is the noise level as it is.

  Next, the threshold value setting unit 22 calculates a threshold value based on the noise level. First, the threshold value setting unit 22 calculates an average value of the noise level (S3). Next, the correction value α of the time period is acquired from the correction value table 151 (S4), and the correction value α is added to the average value to calculate a reference noise level, that is, a threshold value (S5) ( (See FIG. 4).

  Next, the noise determination means 23 determines whether or not the noise level of each section is noise. First, the noise determination means 23 reads the noise level for each section from the noise level storage area 142 of the RAM 14 (S6). Then, for each section, it is determined whether or not the noise level of the section is equal to or higher than the threshold (S7). If it is determined that the noise level is equal to or higher than the threshold, noise is generated in the section. This is notified by the control of the notification control means 24 (S8). FIG. 4 shows an example in which it is determined that the sections C and E are generating noise, and notification is made by the notification devices 34c and 34e.

  As described above, this notification may be performed by emitting a buzzer sound or sound from the speaker 341, blinking the light source 342, or displaying a character string or figure on a screen 343 such as a touch panel. Or may be performed in combination. Sounds, voices, character strings, graphics, etc. used when making this notification are expressed in a way that alerts the customer and does not impair their mood. It is possible to make a notification without incurring In addition, when the customer in the notified section talks at a reduced volume, the other sections can continue talking and eating comfortably without being disturbed by the conversation. On the other hand, if it is determined that the noise level is less than the threshold value, the notification process (S8) in step 8 is unnecessary, and the process proceeds to the next step 9 (S9).

  In step 9, it is determined whether or not the noise levels of all the sections have been compared with the threshold value (S9). If there is a section that should be compared with the threshold value, step 7 (S7) to step 8 are performed. The process of (S8) is repeated. When the processing is completed for all the sections, time monitoring is performed by the timer 16 until a predetermined time has passed (S10), and when the predetermined time has elapsed, the noise level analysis result notification processing is terminated.

  Note that the processing from step 1 (S1) to step 10 (S10) is actually repeated at all times under the time monitoring by the timer 16.

<Other embodiments>
The noise level analysis result notification system of the present invention and the devices and means constituting the peripheral device thereof are not limited to those described above, and only the necessary devices and means may be configured according to the purpose of use or the like. Devices and means can be added. Further, each unit may be configured as a unit in which a plurality of functions are integrated, instead of being configured separately.

  Furthermore, when comprehensively managing a plurality of stores having different floors and locations, a network noise level analysis result notification system is provided by connecting each noise level analysis result notification device and a host via an Internet communication line. By building, stores can be managed centrally.

  Moreover, although the above-mentioned embodiment demonstrated the example which applied the noise level analysis result alerting | reporting system of this invention in the store of a pub, it can also be applied to various facilities, such as a library and a hotel lobby. Further, the present invention can be applied not only to indoor facilities but also to outdoor facilities such as beer gardens, terrace seats, and garden restaurants.

  In addition, in the above-described embodiment, the correction value table 151 in which the correction value α is set for each time zone is used in consideration of the difference in the noise level that is perceived as noise during business hours, but the average value itself varies. Therefore, only one correction value α may be set. In this case, the correction value α may be stored in the HDD 15 or may be stored in the RAM 14.

  Further, when calculating the threshold value, the calculation is performed based on the average value of the noise level of each section. However, the standard deviation of the noise level may be obtained, and the threshold value may be calculated based on the standard deviation. Further, as described above, the volume data acquired by the area-specific volume data acquisition unit 25 may be used for the threshold calculation without using the volume data acquired by the section-specific volume data acquisition unit 20.

  Further, without using the average value and the standard deviation value as described above, for example, a fixed noise level such as 80 dB is set in advance, and this noise level is corrected by the correction value α for each time zone, thereby You may make it change a threshold value according to a time slot | zone.

DESCRIPTION OF SYMBOLS 10 Noise level analysis result notification apparatus 11 Apparatus main body 12 Central control means 13 ROM
14 RAM
141 Volume data storage area 142 Noise level storage area 143 Threshold storage area 15 HDD
151 Correction value table 151a Time zone setting area 151b Correction value setting area 16 Timer 17 Bus 20 Volume-specific sound data acquisition means 21 Noise level calculation means 22 Threshold setting means 23 Noise determination means 24 Notification control means 25 Area-specific volume data acquisition means 30 (30a-30h) Sound level meter 34 by section 34 (34a-34h) Notification device 341 Speaker 342 Light source 343 Screen 35 (35a, 35b) Sound level meter 100 by area (volume analysis target area)
A to H section

Claims (3)

By dividing the volume analyzed area is open space into a plurality sections, collects volume data for each compartment, on the basis of the volume data, to calculate the noise level of each compartment, overall in open space A system for individually responding to a large number of customer groups according to the noise level and notifying that noise is occurring in the section where the noise level is equal to or higher than a threshold value,
Volume-specific volume data acquisition means, noise level calculation means, threshold setting means, noise determination means, notification control means,
The section-specific volume data acquisition means is provided for each section, acquires volume data generated from the section,
The noise level calculating means analyzes the acquired volume data of each section, calculates a noise level of each section,
The threshold value setting means calculates and sets a threshold value with a predetermined arithmetic expression based on the current noise level for each section calculated by the noise level calculation means,
The noise determination means determines whether the calculated noise level is equal to or higher than a predetermined threshold for each of the sections,
When the noise level is determined to be greater than or equal to a threshold value for an arbitrary section, the notification control unit performs control so as to notify the notification device provided in the section that noise is occurring. To
A noise level analysis result notification system characterized by the above. In addition, by area volume data acquisition means,
The volume data acquisition means for each area is arranged for each area composed of one or a plurality of sections in the volume analysis target area, acquires volume data of each area,
The noise level calculation means analyzes the acquired volume data of each area, calculates a noise level of each area,
The threshold value setting means calculates and sets a threshold value with a predetermined arithmetic expression based on the calculated current noise level for each area .
The noise level analysis result notifying system according to claim 1. The threshold setting means refers to a correction value table in which correction values are set for each time , performs correction based on the correction values set in the correction value table, and sets the threshold.
The noise level analysis result notifying system according to claim 1 or 2.

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