JP2021089349A - Alarm sound control device - Google Patents

Abstract

To provide an alarm sound control device capable of suppressing an abnormal sound from being generated through simple processing even if an alarm sound changes in loudness.SOLUTION: Alarm sound data corresponding to an alarm sound of one cycle is divided into a plurality of pieces of divided alarm sound data WAV1 to WAVn, which are stored in a storage part 26. The storage part 26 is further stored with a plurality of pieces of attenuation sound data wav1 to wavn-1, which are associated with the plurality of pieces of divided alarm sound data WAV1 to WAVn respectively and also used to attenuate an alarm sound based upon the divided alarm sound data. An alarm sound I/F 21 regenerates, when a blowing stop instruction is received from an MPU 20 in the middle of blowing of the alarm sound, regenerates attenuation sound data associated with the divided alarm sound data being regenerated, successively to the divided alarm sound data.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an alarm sound control device that controls the sounding of an alarm sound.

For example, Patent Document 1 discloses a vehicle warning drive device that generates a warning sound to notify a user in a vehicle that the door has been forgotten to be closed or the light has been forgotten to be turned off. The device of Patent Document 1 generates a drive signal that gradually rises and falls as a drive signal that is output to the speaker in order to sound an alarm sound. As a result, the generation of abnormal sounds other than the desired alarm sound is reduced so that the user does not recognize it.

JP-A-2009-260544

Patent Document 1 indicates that when the alarm sound is started to sound, all the alarm sounds having a predetermined length are sounded. However, when the cause for sounding the alarm disappears during the sounding of the alarm (for example, the door is closed, the light is turned off, etc.), the sounding of the alarm is immediately stopped. May be preferable. At this time, if the output of the drive signal for sounding the alarm sound is immediately cut off, unintended vibration may occur in the diaphragm of the speaker, and an abnormal noise (bottom sound) may be generated. In order to prevent this, for example, as in the case of the falling edge of the driving signal in Patent Document 1, it is conceivable to output an attenuated signal that gradually falls in a predetermined pattern to the speaker after blocking the output of the driving signal. Be done.

However, such a process can be easily performed when the loudness of the alarm sound (amplitude of the drive signal) is constant, but cannot be simply performed when the loudness of the alarm sound changes. That is, when the loudness of the alarm sound changes, the loudness of the alarm sound changes according to the timing at which the output of the drive signal is cut off. Therefore, even if an attenuation signal that gradually falls in a predetermined pattern as described above is output, the magnitude of the predetermined pattern and the loudness of the immediately preceding alarm sound may deviate from each other, and the deviation causes an abnormal noise. It may occur.

The present disclosure has been made in view of the above-mentioned points, and an alarm sound control device capable of suppressing the generation of abnormal noise by a simple process even when the loudness of the alarm sound changes. The purpose is to provide.

In order to achieve the above object, the alarm sound control device according to the present disclosure is
A storage unit (26) that stores alarm sound data for sounding an alarm sound, and
When the condition for sounding the alarm sound is satisfied, the alarm sound sounding unit (22, 30) that sounds the alarm sound by reading the alarm sound data from the storage unit and playing it back is provided.
The alarm sound has a predetermined length, and the loudness of the sound changes within the predetermined length.
_{The storage unit stores the divided alarm sound data (WAV 1 to WAV n} ) in which the alarm sound of a predetermined length is set as one cycle and the alarm sound data corresponding to the alarm sound for the one cycle is divided into a plurality of parts. _{Further, a plurality of attenuated sound data (wav 1 to wav n-1} ) for attenuating the alarm sound due to the divided alarm sound data associated with the plurality of divided alarm sound data are stored.
If the condition for stopping the sounding of the alarm sound is satisfied before the alarm sound sounding unit finishes sounding the alarm sound for one cycle, the divided alarm sound data is reproduced and then associated with the divided alarm sound data. It is characterized in that the alarm sound being sounded is attenuated by reproducing the attenuated sound data.

As described above, according to the alarm sound control device according to the present disclosure, the alarm sound data corresponding to the alarm sound for one cycle is divided into a plurality of parts, and the divided plurality of divided alarm sound data is stored in the storage unit. .. Further, the storage unit also stores a plurality of attenuated sound data for attenuating the alarm sound due to the divided alarm sound data, which is associated with the plurality of divided alarm sound data. Therefore, if the condition for stopping the sounding of the alarm sound is satisfied before the alarm sound sounding unit finishes sounding the alarm sound for one cycle, the alarm sound sounding unit can easily continue to reproduce the divided alarm sound data. It is possible to reproduce the decay sound data associated with the divided alarm sound data. As a result, when the alarm sound whose magnitude changes is stopped in the middle of the sounding, it is possible to suppress the generation of abnormal noise by simple processing without incurring a complicated configuration or an increase in processing load. ..

The reference numbers in parentheses are merely examples of the correspondence with the specific configuration in the embodiment described later in order to facilitate the understanding of the present disclosure, and are intended to limit the scope of the invention. It's not something I did.

Further, the technical features described in each claim of the claims other than the above-mentioned features will be clarified from the description of the embodiment and the attached drawings described later.

It is a block diagram which shows the schematic structure of the alarm sound control device which concerns on embodiment. It is a flowchart which shows the process when the sounding condition of an alarm sound is satisfied, which is executed in MPU. It is a flowchart which shows the process at the time of the sounding stop condition of an alarm sound which is executed in MPU. It is explanatory drawing for demonstrating an example of the alarm sound whose loudness changes during sounding, and the alarm sound data corresponding to the alarm sound. It is explanatory drawing for demonstrating the attenuated sound data, and (a) shows that the magnitude of the peak value of the start end of the attenuated sound data is equal to the peak value of the end of the associated divided alarm sound data. (B) indicates that the magnitude of the peak value of the attenuated sound data is periodically and gradually attenuated from the peak value at the beginning to zero. It is a flowchart which shows the sounding process and the sounding stop process of an alarm sound in an alarm sound I / F. It is an operation explanatory diagram which shows the operation by the sounding stop processing. It is a block diagram which shows the structure of the modification.

Hereinafter, the alarm sound control device according to the embodiment of the present disclosure will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing a schematic configuration of an alarm sound control device 10 according to an embodiment. In the present embodiment, the alarm sound control device 10 is applied to a vehicle, and when a state of the vehicle in which the alarm sound should be generated occurs, the alarm sound control device 10 controls the sounding of the alarm sound. Will be described.

As shown in FIG. 1, the alarm sound control device 10 is configured to operate by receiving power supply from the vehicle-mounted battery 1. Specifically, the vehicle-mounted battery 1 is directly connected to the anode of the diode 11 and is also connected to the anode of the diode 12 via the IG switch 2. The diode 11 and the diode 12 are connected to each other with cathodes and are connected to a power supply circuit 13 that transforms the battery voltage of the vehicle-mounted battery 1 to 5V. The power supply circuit 13 supplies power for operation to each electronic circuit and electronic component of the alarm sound control device 10 including the MPU 20. Therefore, each electronic circuit and electronic component of the alarm sound control device 10 including the MPU 20 can be operated by the 5V power supply provided by the power supply circuit 13 even if the IG switch 2 is not turned on.

The I / F circuit 14 outputs a signal corresponding to the on / off state of the IG switch 2 to the MPU 20. As a result, the MPU 20 can grasp whether the IG switch 2 is in the on state or the off state. This makes it possible for the MPU 20 to determine, for example, that the light has been forgotten to be turned off after the IG switch 2 is turned off.

The multiplex communication I / F circuit 15 is an interface for communicating with another vehicle-side ECU 3. The alarm sound control device 10 can receive a sounding instruction of an alarm sound from another vehicle-side ECU 3 through the multiplex communication I / F circuit 15. Further, the alarm sound control device 10 can also receive an alarm sound sounding stop instruction from another vehicle-side ECU 3 through the multiplex communication I / F circuit 15. When the alarm sound control device 10 receives the warning sound sounding instruction from the other vehicle-side ECU 3, it can determine that the warning sound sounding condition is satisfied. Further, when the alarm sound control device 10 receives the warning sound sounding stop instruction from the other vehicle-side ECU 3, it can determine that the warning sound sounding stop condition is satisfied.

For example, the other vehicle-side ECU 3 corresponds to the ECU of the lane departure prevention support system or the ECU of the collision avoidance system. The lane departure prevention support system assists the steering operation for avoiding deviation from the lane when the vehicle is about to deviate from the lane, and instructs the alarm sound control device 10 to generate a lane departure warning. be able to. Then, the lane departure prevention support system can instruct the warning sound control device 10 to stop the generation of the lane departure warning when the possibility that the vehicle deviates from the lane is reduced.

Further, the collision avoidance support system detects a vehicle or a pedestrian in front of the vehicle while the vehicle is running, and when it is determined that there is a risk of collision, the collision danger warning is issued to the alarm sound control device 10. Can be instructed to. If the risk of collision is further increased, the collision avoidance support system can automatically brake or steer the vehicle. On the other hand, if the danger of collision disappears while the warning sound is sounding, the collision avoidance support system can instruct the warning sound control device 10 to stop the generation of the collision danger warning.

The other vehicle-side ECU 3 is not limited to the lane departure prevention support system and the collision avoidance support system described above, and all vehicle-side ECUs that output an alarm sound generation instruction to the alarm sound control device 10 can be applicable.

The I / F circuit 16 outputs a signal corresponding to the on / off state of the seatbelt switch 4 to the MPU 20. As a result, when the MPU 20 detects that the seatbelt is not fastened after the vehicle starts traveling, it can determine that the condition for sounding the seatbelt non-fastening alarm sound is satisfied. Further, when it is detected that the seatbelt is fastened while the seatbelt non-fastening alarm sound is sounding, the MPU 20 can determine that the seatbelt non-fastening warning sound sounding stop condition is satisfied.

The I / F circuit 17 outputs a signal indicating the oil pressure in the vehicle engine to the MPU 20 based on the signal from the oil pressure switch 5. As a result, when the MPU 20 detects a decrease in the oil pressure in the vehicle engine, it can determine that the condition for sounding the oil pressure decrease alarm sound is satisfied. Further, when the recovery of the electric pressure is detected by replenishing the engine oil or the like, it can be determined that the condition for stopping the sound of the low oil pressure alarm sound is satisfied.

The I / F circuit 18 is from another switch 6 (for example, a switch indicating an open / closed state of a vehicle door, an on / off state of lighting, etc.) that generates a signal related to a vehicle state in which it is necessary to generate an alarm sound. The signal corresponding to the signal of is output to the MPU 20. As a result, the MPU 20 determines that the condition for sounding the alarm sound is satisfied according to the predetermined vehicle condition in which it is necessary to generate the alarm sound, and when the vehicle condition is resolved, the alarm sound is emitted. It can be determined that the sounding stop condition of is satisfied.

The various alarm sounds described above may be the same or different. However, in the alarm sound control device 10 according to the present embodiment, with respect to at least one alarm sound, the loudness of the alarm sound changes during the sounding of the alarm sound, and the alarm sound is sounded during the sounding of the alarm sound. When the stop condition is satisfied, the sounding of the alarm sound can be stopped halfway. This point will be described in detail later.

The MPU 20 is a computer including a CPU, ROM, RAM, I / O, and a bus line connecting these configurations. The ROM stores a program for operating a general-purpose computer as the MPU 20. When the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, the MPU 20 executes the alarm sound control process described later. Executing the alarm sound control process by the MPU 20 means that the method corresponding to the program is executed. The MPU 20 may be realized by a dedicated hardware logic circuit in addition to being realized by a computer. Hardware logic circuits are, for example, ASICs and FPGAs. Further, the MPU 20 may be realized by a combination of a processor that executes a computer program and one or more hardware logic circuits.

The MPU 20 executes the process shown in the flowcharts of FIGS. 2 and 3 as an alarm sound control process relating to an alarm sound whose loudness changes during blowing. FIG. 2 is a flowchart showing a process when the alarm sound is sounded and the condition is satisfied. FIG. 3 is a flowchart showing a process when the alarm sound is sounded and the stop condition is satisfied. The processes shown in the flowcharts of FIGS. 2 and 3 are periodically and repeatedly executed by the MPU 20. Hereinafter, the alarm sound control process executed by the MPU 20 will be described with reference to the flowcharts of FIGS. 2 and 3.

In step S100 of the flowchart of FIG. 2, the MPU 20 takes in signals from various switches 2, 4 to 6 and instructions from other vehicle-side ECUs 3 via the I / F circuits 14 to 18. Then, in the subsequent step S110, the MPU 20 determines whether or not at least one alarm sound sounding condition is satisfied based on the signals from the various switches 2, 4 to 6 and the instructions from the other vehicle-side ECU 3. judge. When the MPU 20 determines that the sounding condition of at least one alarm sound is satisfied, the MPU 20 instructs the alarm sound I / F 21 to sound the alarm sound in step S120.

In step S200 of the flowchart of FIG. 3, the MPU 20 captures signals from various switches 2, 4 to 6 and instructions from other vehicle-side ECUs 3 via the I / F circuits 14 to 18. Then, in the following step S210, the MPU 20 determines whether or not the condition for stopping the sounding of the alarm sound during sounding is satisfied based on the signals from the various switches 2, 4 to 6 and the instructions from the other vehicle-side ECU 3. Is determined. When the MPU 20 determines that the condition for stopping the sounding of the alarm sound during sounding is satisfied, the MPU 20 instructs the alarm sound I / F21 to stop the sounding of the alarm sound in step S220.

The alarm sound I / F 21 outputs a drive signal corresponding to the corresponding alarm sound to the speaker 30 in response to the sounding instruction of the alarm sound from the MPU 20, and executes the sounding of the alarm sound. That is, the alarm sound I / F 21 and the speaker 30 correspond to the alarm sound sounding unit. Further, the alarm sound I / F 21 executes a process of stopping the sounding of the alarm sound during the sounding in response to the sounding stop instruction of the alarm sound from the MPU 20. In the present embodiment, in the sounding stop processing of the alarm sound, the processing for suppressing the alarm sound I / F 21 from emitting an abnormal sound (bottom sound) from the speaker 30 due to the stop of the alarm sound. To execute. The process of stopping the sounding of the alarm sound for suppressing the generation of this abnormal noise will be described in detail later.

As shown in FIG. 1, the alarm sound I / F 21 includes an alarm sound IC 22 and a flash ROM 26 as a storage unit. The alarm sound IC 22 amplifies the analog signal corresponding to the alarm sound to be sounded and outputs the AMP 23 as a drive signal for driving the speaker 30, and when it becomes necessary to sound a plurality of alarm sounds at the same time, they are used. It has a MIXER 24 that mixes analog signals corresponding to a plurality of alarm sounds, and a DAC 25 that converts the alarm sound data stored as a digital signal in the flash ROM 26 into an analog signal corresponding to the alarm sound that sounds. The flash ROM 26 is a storage medium that stores alarm sound data corresponding to various alarm sounds.

An example of an alarm sound whose loudness changes during blowing and alarm sound data corresponding to the alarm sound will be described with reference to FIG. As shown in FIG. 4A, the alarm sound has a predetermined length and is set so that the loudness of the sound changes within the predetermined length. Then, as shown in FIG. 4B, the alarm sound of a predetermined length is set as one cycle, and the alarm sound data corresponding to the alarm sound for the one cycle is evenly divided into a plurality of divided alarm sound data WAVs. _{1 ~WAV n} is stored in mutually independent data file _DF 1 _{~DF n,} stored in the flash ROM 26. The flash ROM26 further, as shown in FIG. 4 (c), the data file _DF 1 is stored in ～DF _n associated with the plurality of divided alarm sound data _WAV 1 _{~WAV n,} the divided alarm sound data WAV ₁ ~WAV _n data file _{df 1 ~df n-1} of the plurality of decay data _{wav 1 ~wav n-1} for attenuating the alarm sound by also stored independently of each other. There is no attenuated sound data associated with the last divided alarm sound data WAV _n.

Each of the attenuated sound data wav _{1 to wav n-1} stored in the data files df _{1 to df n} corresponds to the magnitude of the peak value at the beginning, more specifically, as shown in FIG. 5 (a). It is defined to be equal to the peak value at the end of the attached split alarm sound data WAV _{1 to WAV n-1.} Further, as shown in FIG. 5B, each of the attenuated sound data wav _{1 to wav n-1} is determined so that the magnitude of the crest value is gradually attenuated from the crest value at the beginning to zero. Has been done. Therefore, as shown in FIGS. 5A and 5B, the divided alarm sound data WAV _{1 to WAV n-1 stored in the arbitrary data files DF 1 to DF n-1} are followed by the divided alarm sound. by reproducing the data _{WAV 1 ~WAV n-1} decay data _{wav 1 ~wav n-1} associated with any time be sounded by the stop instruction of warning sound, securely abnormal noise It can be suppressed.

Next, the sounding process and the sounding stop process of the alarm sound I / F21 will be described with reference to the flowchart of FIG. The process shown in the flowchart of FIG. 6 is executed by the alarm sound I / F 21 when the alarm sound is sounded and instructed by the MPU 20.

First, in the first step S300, the alarm sound I / F21 determines whether or not the alarm sound in response to the sounding instruction from the MPU 20 corresponds to the sound-off specification. Depending on the type of alarm sound, once the alarm sound is started to sound, even if the state in which the alarm sound should be sounded is resolved, the alarm sound is not stopped in the middle of the sounding, and the predetermined length is set. It may be preferable to turn off all the alarm sounds. In the present embodiment, such an alarm sound in which it is preferable to sound all of them is defined as an alarm sound having a sound-off specification. If it is determined in step S300 that the alarm sound corresponds to the ring-off specification, the process proceeds to step S380 to read and reproduce the alarm sound data WAV stored in the instructed alarm sound data file DF. The alarm sound data file DF stores the alarm sound data WAV of the entire alarm sound. As a result, the instructed alarm sound is sounded to the end. If the stop condition is set, the alarm sound data WAV is repeatedly reproduced until the stop condition is satisfied.

On the other hand, if it is determined in step S300 that the alarm sound does not correspond to the sound-off specification, the process proceeds to step S310. If the alarm sound does not correspond to the complete sound specification, as described above, the alarm sound data corresponding to the alarm sound whose loudness changes during the sounding is divided into a plurality of divided alarm sound data WAV ₁ to The WAV _n is stored in the corresponding data files DF _{1 to DF n.} In step S310, the variable k that specifies the data file DF _k that stores the split alarm sound data WAV _{1 to WAV n to be sounded is set to 1.} In the following step S320, the split alarm sound data WAV _k is reproduced _{from the instructed alarm sound data file DF k.} As a result, the alarm sound IC 22 outputs a drive signal for sounding the alarm sound corresponding _{to the divided alarm sound data WAV k to the speaker 30.}

In the following step S330, it is determined whether or not the alarm sound I / F 21 has received the alarm sound sounding stop instruction from the MPU 20. In this determination process, if it is determined that the alarm sound has not been sounded and the stop instruction has not been received, the process proceeds to step S340. In step S340, whether or not the data file that stores the split alarm sound data being _{played is the data file DF n that stores the last split alarm sound data WAV n} (that is, whether or not k = n). To judge. In this determination process, if it is determined that it is not a data file DF _n, in step S350, increments the variable k for specifying the data file DF _k. On the other hand, _{when it is determined that the data file DF n} , the process returns to the process of step S310, and the variable k that specifies the data file DFk is set to 1. By such processing, when an alarm sound is sounded from the MPU 20, the divided alarm sound data WAV _{1 to WAV n} corresponding to the corresponding alarm sound are read from the flash ROM 26 and played back in order to generate the alarm sound. Can ring. That is, the divided alarm sound data WAV _{1 to WAV n} that have been read out are sequentially converted into analog signals by the DAC 25, and the analog signals are amplified by the AMP 23 to generate a drive signal, thereby generating each divided alarm sound data. Alarm sounds corresponding to WAV _{1 to WAV n} are continuously output from the speaker 30. Further, the alarm sound can be repeatedly sounded until the alarm sound is sounded and the stop instruction is received.

If the MPU 20 gives an instruction to stop the sounding of the alarm sound during the sounding of the alarm sound, a positive determination is made in step S330, and the process proceeds to step S360. In step S360, as in step S340, it is determined whether or not the data file that stores the _{alarm sound data being played is the data file DF n that stores the last divided alarm sound data WAV n.} In this determination process, when _{it is determined that the data file is DF n} , since the associated attenuation sound data does not exist, the reproduction of the divided alarm sound data WAV _{1 to WAV n} is terminated without reproducing the attenuation sound data. To do. On the other hand, _if it is determined that the data file is not DF n, the process proceeds to step S370. In step S370, based on the value of the variable k for specifying the data file DF _k for storing the divided alarm sound data WAV _k being reproduced, the decay data wav _k associated with the division the alarm sound data WAV _k being reproduced The data file df _k to be stored is specified, and the decay sound data wav _{k read from the data file df k} is reproduced in succession to the split alarm sound data WAV _k.

A specific example of the process of step S370 is shown in FIG. In this example, as shown in FIG. 7A, the alarm sound I / F 21 receives an instruction to stop sounding the alarm sound from the MPU 20 while reproducing the _{divided alarm sound data WAV m.} In response to this sounding stop instruction, as shown in FIG. 7B, the alarm sound I / F21 _{identifies the attenuated sound data wav m associated with the divided alarm sound data WAV m} , and the attenuated sound data wav m is specified. The wav _m is reproduced in succession to the split alarm sound data WAV _m. As a result, as shown in FIG. 7C, even when the alarm sound being sounded is stopped in the middle, the loudness of the alarm sound can be attenuated to gradually decrease to zero.

As described above, the alarm sound control device 10 according to the present embodiment is simple without complicating the configuration or increasing the processing load when stopping the alarm sound whose magnitude changes in the middle of the sound. The generation of abnormal noise can be suppressed by various processing.

Although the preferred embodiments of the present disclosure have been described above, the present disclosure can be variously modified and implemented without being limited to the above-described embodiments and within a range that does not deviate from the gist of the present disclosure.

For example, in the above-described embodiment, an example in which the alarm sound data is evenly divided into divided alarm sound data has been described, but all the alarm sound data may not necessarily be evenly divided.

Further, as the attenuated sound data, it is not always necessary to prepare the attenuated sound data associated with all the divided alarm sound data. For example, in the divided alarm sound data, every other divided alarm sound data is prepared, and the divided alarm sound data is not prepared. While the divided alarm sound is being sounded, the sound is stopped. If the condition is satisfied, the attenuated sound data may be reproduced after the next divided alarm sound data in which the attenuated sound data is prepared is reproduced. In other words, one attenuated sound data may be prepared in association with the two divided alarm sound data.

In the above-described embodiment, an example in which the alarm sound data of the sound-off specification is stored in one data file has been described. In order to sound the alarm sound in the same procedure, the alarm sound data for one cycle may be divided and stored in the storage medium.

In the above-described embodiment, the configuration in which the MPU 20 and the alarm sound I / F21 are separated has been described, but as shown in FIG. 8, the MPU 20a is configured to incorporate the configuration of the alarm sound I / F21 excluding the AMP23. You can also do it.

The alarm sound control device 10 of the present disclosure may be applied to other uses such as production equipment instead of a vehicle.

1: In-vehicle battery, 2: IG switch, 3: Vehicle side ECU, 4: Seat belt switch, 5: Oil pressure switch, 6: Other switch, 10: Alarm sound control device, 11: Diode, 12: Diode, 13 : Power supply circuit, 14: I / F circuit, 15: Multiplex communication I / F circuit, 16: I / F circuit, 17: I / F circuit, 18: I / F circuit, 20: MPU, 21: Alarm sound I / F, 26: Flash ROM, 30: Speaker

Claims (5)

A storage unit (26) that stores alarm sound data for sounding an alarm sound, and
When the condition for sounding the alarm sound is satisfied, the alarm sound sounding unit (22, 30) that sounds the alarm sound by reading the alarm sound data from the storage unit and playing the data is provided.
The alarm sound has a predetermined length, and the loudness of the sound changes within the predetermined length.
_{The storage unit stores the divided alarm sound data (WAV 1 to WAV n} ) in which the alarm sound of a predetermined length is set for one cycle and the alarm sound data corresponding to the alarm sound for the one cycle is divided into a plurality of parts. Further, a plurality of attenuated sound data (wav1 to wavn-1) for attenuating the alarm sound due to the divided alarm sound data associated with the plurality of divided alarm sound data are stored.
If the condition for stopping the sounding of the alarm sound is satisfied before the alarm sound sounding unit for one cycle finishes sounding, the alarm sound sounding unit corresponds to the divided alarm sound data following the reproduction of the divided alarm sound data. An alarm sound control device that attenuates the alarm sound during sounding by reproducing the attached attenuated sound data. The alarm sound control device according to claim 1, wherein the divided alarm sound data is obtained by evenly dividing the alarm sound data corresponding to one cycle of the alarm sound. The first or second aspect of claim 1 or 2, wherein the attenuated sound data starts with a crest value equal to the crest value at the end of the associated divided alarm sound data, and the crest value is periodically and gradually attenuated to zero. Alarm sound control device. In the alarm sound blowing unit, the divided alarm sound data being played when the condition for stopping the sounding of the alarm sound is satisfied is the last divided alarm sound data for sounding the alarm sound for one cycle. The alarm sound control device according to any one of claims 1 to 3, wherein the reproduction of the divided alarm sound data is terminated without reproducing the attenuated sound data. The alarm sound control device according to any one of claims 1 to 4, wherein the alarm sound sounding unit repeatedly sounds an alarm sound for one cycle until a condition for stopping the sounding of the alarm sound is satisfied.

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