Voice output device and electrical equipment

Abstract

The present invention provides a voice output device, which is configured to output an operation sound from a voice output device that outputs a voice message or a melody, and when the operation sound needs to be output during the output of the voice message or the melody, the voice message or the melody will not be stopped in the middle and the operation sound can be output at an appropriate time. The voice output device includes: a speaker; and a voice control unit, which, when the operation sound needs to be output during the process of supplying a voice signal of the voice message or the melody to the speaker, does not interrupt the supply of the voice signal of the voice message or the melody, but synthesizes the operation sound with the voice message or the melody and supplies them.

Description

Technical Field

[0001] The present invention relates to a voice output device mounted on an electrical device and the electrical device. Background Art

[0002] In the past, there was a device as follows: in electrical equipment such as home appliances, there was a voice output device including an amplifier circuit and a speaker, and a voice message and melody were output to notify the user that the electrical equipment was in a specified state. If the specified state is, for example, an air purifier, it becomes a state that requires cleaning and replacement of the filter, or a state that requires replenishment of water for humidification. When the air purifier is in such a state, a voice message or a specified melody such as "Please clean the filter.", "The water tank is empty. Please replenish water." is output. In addition, there is also an electrical device that outputs a logged-in message as one of the voice messages (for example, Patent Document 1).

[0003] In addition to the voice messages and melodies of the voice output devices described above, there are also electrical devices that output (generate) operation sounds such as "beep" and "beep beep" when a switch or remote controller is operated. In such electrical devices, in addition to the voice output device, an amplifier circuit and a piezoelectric buzzer for the operation sound are also provided.

[0004] However, in a configuration that includes a device for operating sound (amplifier circuit and piezoelectric buzzer, etc.) in addition to a voice output device, the number of components increases, and thus the cost inevitably increases. Patent document 2 discloses a system that uses a voice output device to output operating sound in view of such a problem. By setting it in this way, there is no need to set up a device for operating sound separately, so the number of components can be reduced to reduce costs.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2015-225258

[0008] Patent Document 2: Japanese Patent Application Laid-Open No. 10-214099 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In the structure of patent document 2, when the output of an operation sound is required during the output of a voice message, any of the following timings occurs: 1) the operation sound is output after the output of the voice message ends, 2) the operation sound is output at the time when any phrase of the output voice message ends, 3) the output of the voice message is forcibly stopped and the operation sound is output.

[0011] However, at the timing of 1) and 2), there is a problem that the operation sound cannot be output when the operation is accepted. In addition, at the timing of 3), there is a problem that the voice message is interrupted in the middle and the end cannot be heard. In particular, when the voice message is a message, it is impossible to accurately confirm the message.

[0012] An object of one embodiment of the present invention is to provide a voice output device and an electrical device, which are configured to output an operation sound from the voice output device that outputs a voice message or a melody, and when it is necessary to output the operation sound during the output of the voice message or the melody, the voice message or the melody will not be stopped midway and the operation sound can be output at an appropriate timing.

[0013] Means for solving problems

[0014] In order to solve the above-mentioned problem, a voice output device involved in one embodiment of the present invention comprises: a speaker; and a voice control unit, which does not interrupt the supply of the voice signal of the voice message or melody, but synthesizes the operation sound with the voice message or melody and supplies it when it is necessary to output an operation sound during the process of supplying a voice signal of a voice message or melody to the speaker.

[0015] Effects of the Invention

[0016] According to one embodiment of the present invention, a voice output device and an electrical device can be provided, which are configured to output an operation sound from the voice output device that outputs a voice message or a melody, and when the operation sound needs to be output during the output of the voice message or the melody, the voice message or the melody will not be stopped midway and the operation sound can be output at an appropriate timing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a block diagram showing a schematic structure of an air cleaner according to the first embodiment of the present invention.

[0018] Figure 2 For setting Figure 2 FIG. 2 is a diagram for explaining synthesis of a voice signal of a voice message and a voice signal of an operation sound performed by a voice control unit of a control unit of an air purifier shown in FIG.

[0019] Figure 3 To indicate that the Figure 2 Flowchart of the output processing of the operation sound performed by the voice control unit of the control unit of the air purifier shown.

[0020] Figure 4 The diagram is a diagram for explaining synthesis of a melody audio signal and an operation sound audio signal by a audio control unit provided in a control unit of an air cleaner according to a second embodiment of the present invention.

[0021] Figure 5 To indicate that the Figure 4 Flowchart of the output processing of the operation sound performed by the voice control unit of the control unit of the air purifier shown. DETAILED DESCRIPTION

[0022] [First embodiment]

[0023] Hereinafter, an embodiment of the present invention will be described in detail. In addition, in this embodiment, an example of applying the present invention to an air purifier 1 as a type of electrical equipment is described, but the application object of the present invention is not limited thereto, and it can be applied to any electrical equipment as long as it has a voice output device. For example, the present invention can also be applied to electrical equipment such as air conditioners, water heaters, refrigerators, washing machines, lighting devices, blowers, dehumidifiers, humidifiers, heating appliances, cooking appliances, cleaning devices, and cleaning devices.

[0024] Figure 1 1 is a block diagram showing the general structure of the air purifier 1 according to the first embodiment of the present invention. Figure 1 As shown, the air cleaner 1 includes a control unit 10, an air cleaning unit 11, a sensor unit 12, an operation input unit 13, a speaker 14, etc., and purifies air in a predetermined cleaning target space.

[0025] The control unit 10 is composed of a CPU, a dedicated processor and other computing units, and a RAM, ROM, HDD and other storage units (not shown). The control unit 10 controls the operation of each unit of the air purifier 1 according to (i) a program for implementing various information and various controls stored in the storage unit, (ii) instructions from the user input via the operation input unit 13, and (iii) the detection results of the sensor unit 12. A voice control unit 20 is constructed in the control unit 10, and the speaker 14 and the voice control unit 20 constitute a voice output device 15.

[0026] The air cleaning unit 11 includes a deodorizing filter, a dust collecting filter, a blower, and an ion output device (none of which are shown in the figure). The air in the space (the cleaning target space) is purified by controlling the operation of the blower and the ion output device according to the instruction of the control unit 10. The sensor unit 12 is, for example, a dust sensor for detecting microparticles contained in the air. The sensor unit 12 transmits the detection result to the control unit 10.

[0027] The operation input unit 13 receives instructions from the user input via a remote controller or an operation button (not shown) provided on the air purifier 1, and transmits the instructions to the control unit 10. Examples of the instructions include power on / off instructions, wind volume setting instructions, wind direction setting instructions, etc. In addition, when the operation input unit 13 receives instructions from the user, it notifies the voice control unit 20 of an output request for an operation sound.

[0028] The speaker 14 outputs a sound corresponding to the sound signal supplied from the sound control unit 20. In addition, an amplifier circuit (not shown) and the like are provided between the speaker 14 and the sound control unit 20.

[0029] The voice control unit 20 controls the speaker 14 and outputs voice from the speaker 14. The voice control unit 20 supplies a voice signal of a voice message of appropriate content to the speaker 14 at an appropriate time according to the operation and status of each part in the air purifier 1 and outputs the voice message. The storage unit of the control unit 10 stores voice data for outputting information corresponding to the status of the air purifier 1 to the user through a voice message. The content of the voice data of the voice message is, for example, data such as "Please clean the filter" and "The water tank is empty. Please refill water".

[0030] In addition, when the operation input unit 13 notifies the operation sound output request, the voice control unit 20 supplies the voice signal of the operation sound to the speaker 14 at the timing of receiving the notification to output the operation sound. The storage unit of the control unit 10 stores voice data for outputting the operation sound (beep sound). The voice data of the operation sound is data such as "beep" and "beep beep" that is produced by a piezoelectric buzzer.

[0031] Furthermore, when the voice control unit 20 needs to output the operation sound during the process of supplying the voice signal of the voice message to the speaker, the voice control unit 20 does not interrupt the supply of the voice signal of the voice message, but synthesizes the operation sound with the voice message and supplies them. In this embodiment, the voice control unit 20 synthesizes the operation sound on the basis of reducing the volume of the voice message. Specifically, the voice control unit 20 synthesizes the voice signal of the operation sound on the basis of reducing the amplitude of the voice signal of the voice message.

[0032] The synthesis with the volume of the voice message reduced may be performed when the volume exceeds the maximum or minimum value that can be handled by the voice control unit 20. In this case, as a further preferred configuration, the volume of the voice message is reduced by at least the volume of the operation sound.

[0033] In other words, the synthesis based on the amplitude of the voice signal of the voice message may be performed when it exceeds the maximum value or minimum value of the voice signal that can be handled by the voice control unit 20. In this case, as a further preferred configuration, the amplitude of the voice signal of the voice message is reduced by at least the amplitude of the voice signal of the operation sound.

[0034] Figure 2 This is a diagram for explaining the synthesis of the audio signal of the audio message and the audio signal of the operation sound by the audio control unit 20 . Figure 2 (a) shows a voice signal of a voice message supplied to the speaker 14. Figure 2 In (a) to (d) of FIG. 1 , the vertical axis represents the electric signal level and the horizontal axis represents time.

[0035] At time T1, when the output request of the operation sound is notified, as shown in FIG. Figure 2 As shown in (b), reduce Figure 2 (a) The amplitude of the voice signal of the voice message, based on which Figure 2 The voice signal of the operation sound shown in (c) is synthesized. Figure 2 As shown in (d), a voice signal in which the operation sound is synthesized in the voice message can be obtained, and the voice signal is supplied to the speaker 14. By reducing the amplitude of the voice signal of the voice message, the generation of clipping noise can be suppressed.

[0036] Here, the clipping noise is explained. When the voice signal of the voice message and the voice signal of the operation sound are synthesized without adjusting the amplitude (electrical signal level), the amplitude of the synthesized voice signal exceeds the maximum value or minimum value of the voice signal that the voice control unit 20 can handle, and noise is generated. This noise is clipping noise. When the voice signal that generates clipping noise is supplied to the speaker 14, a completely different voice than the desired one will be output from the speaker 14.

[0037] Of course, by using a voice control unit 20 that can handle a wide range of voice signal amplitudes, no clipping noise will be generated even if the voice signal of the voice message and the voice signal of the operation sound are synthesized without adjusting the amplitude. However, when the range of the amplitude of the voice signal that can be handled is large, of course, the cost of the control unit 10 for constructing the voice control unit 20 also increases. Therefore, a voice control unit 20 that can cover the maximum amplitude of the voice signal of the voice message determined by the required volume with maximum capacity is usually used.

[0038] When time T2 is reached and the operation sound output period ends, Figure 2 As shown in (b), the amplitude of the voice message after this returns to the original Figure 2Since the output period of the operation sound can be known in advance, the amplitude of the voice signal of the voice message is reduced during the same period as the output period of the operation sound.

[0039] like Figure 2 As shown in (b), the electric signal level B for reducing the amplitude of the voice signal of the voice message is preferably such that the amplitude of the voice signal of the operation sound is the electric signal level A (refer to Figure 2 As a result, the generation of limiting noise can be more reliably suppressed.

[0040] Figure 3 FIG. 2 is a flowchart showing the output processing of the operation sound performed by the voice control unit 20. Figure 3 As shown, the voice control unit 20 repeatedly determines whether there is a notification of a request to output an operation sound (S1). When the voice control unit 20 is notified of a request to output an operation sound (Yes in S1), it determines whether it is in the process of supplying a voice signal of a voice message to the speaker 14 (S2). When the voice control unit 20 determines that it is not in the process of supplying a voice signal of a voice message to the speaker 14 (No in S2), it supplies a voice signal of an operation sound to the speaker 14 (S5). As a result, an operation sound such as "beep" and "beep beep" is output from the speaker 14.

[0041] On the other hand, when the voice control unit 20 determines that the voice signal of the voice message is being supplied to the speaker 14 (Yes in S2), the voice control unit 20 synthesizes the voice signal of the operation sound on the basis of reducing the amplitude of the voice signal of the voice message without interrupting the supply of the voice signal of the voice message (S3). In addition, the voice control unit 20 supplies (S4) the synthesized voice signal obtained by synthesizing the voice signal of the operation sound with the voice signal of the voice message to the speaker 14. As a result, the operation sound is outputted from the speaker 14 by overlapping the voice message, such as "Please clean the (+beep) filter" without interrupting the voice message.

[0042] (Effect)

[0043] According to the above configuration, when the voice control unit 20 needs to output the operation sound during the process of supplying the voice signal of the voice message to the speaker, the supply of the voice signal of the voice message is not interrupted. Instead, the voice signal of the operation sound is synthesized with the voice signal of the voice message and supplied. Thus, it is possible to output the operation sound using the same device (voice control unit 20 and speaker 14, etc.) as the voice message, and the voice message will not be stopped even during the output of the voice message, but the operation sound can be output at an appropriate time. Since the voice message will not be stopped midway, if the voice message is a message, the message can be accurately confirmed.

[0044] Furthermore, in the present embodiment, the audio control unit 20 synthesizes the audio signal of the operation sound after reducing the amplitude of the audio signal of the audio message, and thus it is possible to suppress the generation of clipping noise.

[0045] In particular, in the present embodiment, the voice control unit 20 reduces the amplitude of the voice message to be equal to or greater than the amplitude of the voice signal of the operation sound. Thus, even if the voice control unit 20 is capable of covering the maximum amplitude of the voice signal of the voice message with the maximum capability, the generation of clipping noise can be reliably suppressed.

[0046] [Second embodiment]

[0047] In the following, other embodiments of the present invention will be described. In addition, for the sake of convenience of description, the same reference numerals are given to components having the same functions as those described in the above embodiments, and their description will not be repeated.

[0048] In the first embodiment, the voice control unit 20 supplies a voice signal of a voice message to the speaker 14 to output the voice message. In contrast, in the present embodiment, the voice control unit 20 supplies and outputs a voice signal of a melody as a synthesized sound to the speaker 14, and outputs the melody instead of the voice message. The melody is a sound data having different volume, pitch, beat, etc. stored in each track obtained by synthesizing the sound of the voice data of multiple tracks. The voice control unit 20 synthesizes the operation sound on the basis of reducing at least one track among the multiple tracks.

[0049] Figure 4 1 and 12 are diagrams for explaining synthesis of a melody audio signal and an operation sound audio signal by the audio control unit 20 . Figure 4 (a) to (d) are signals representing images of sounds of speech data of a plurality of tracks constituting a melody, Figure 4 (e) shows the Figure 4 The sound of the four tracks (a) to (d) is synthesized and supplied to the speaker 14 as a melody voice signal (analog signal). Figure 4 (a)~

[0050] In (h), the vertical axis represents the electric signal level, and the horizontal axis represents time.

[0051] At time T1, when the output request of the operation sound is notified, as shown in FIG. Figure 4 As shown in (f), to reduce Figure 4 (e) The amplitude of the melody speech signal is processed, and on this basis Figure 4 The voice signal of the operation sound shown in (g) is synthesized. Figure 4As shown in (h), a voice signal in which the operation sound is synthesized into the melody can be obtained and supplied to the speaker 14.

[0052] In the case of a melody as a synthesized sound, the amplitude of the speech signal is reduced by reducing the number of tracks to be synthesized. Figure 4 In (f), reduce Figure 4 The audio track shown in (d) is used to Figure 4 The sound of the speech data of the three tracks (a) to (c) is synthesized.

[0053] At time T2, when the operation sound output period ends, Figure 4 As shown in (f), the melody after this returns to the sound after synthesizing the voice data of the four tracks. Figure 4 Since the output period of the operation sound is known in advance, the voice control unit 20 outputs the operation sound in the same period as the output period of the operation sound. Figure 4 The speech data of the audio track (d) is processed in such a manner that it is not included in the synthesized audio.

[0054] In this way, by reducing the number of tracks to be synthesized, the voice signal of the operation sound is synthesized based on the tracks, so that the generation of clipping noise can be suppressed as in the first embodiment. In addition, in this case, it is also preferable to select an electrical signal level A (refer to Figure 4 Thus, as described above, the generation of limiting noise can be more reliably suppressed. In a case where the magnitude of the electrical signal level A of the amplitude of the voice signal of the operation sound cannot be reduced in one track, it is sufficient to reduce multiple tracks.

[0055] In addition, the voice control unit 20 preferably includes the lowest-pitched track among the multiple tracks in the track to be cut when selecting the track to be cut. In the audible frequency range, the higher the pitch, the easier it is for people to hear. In addition, the high-pitched track is often responsible for the melody (the main part of the melody). Therefore, the lowest-pitched track among the multiple tracks is included in the track to be cut, so that the discomfort felt by cutting the track can be reduced.

[0056] In this embodiment, the voice control unit 20 selects and cuts the lowest sound track when notifying the output request of the operation sound. The voice control unit 20 selects the track with the lowest frequency (longer period) of the sound signal after the voice data is converted among the multiple tracks. In addition, the predetermined track can also be determined as the bass track.

[0057] Furthermore, the voice control unit 20 may be configured to include the track with the smallest volume among the multiple tracks in the track to be cut when selecting the track to be cut. The possibility that the track with the smallest volume is responsible for the melody (the main part of the melody) is low. Therefore, as the track to be cut, the track with the smallest volume among the multiple tracks can be included, so that the discomfort felt by cutting the track can be reduced.

[0058] Figure 5 FIG. 2 is a flowchart showing the output processing of the operation sound performed by the voice control unit 20. Figure 5 As shown, the voice control unit 20 repeatedly determines whether there is a notification of a request to output an operation sound (S1). When the voice control unit 20 is notified of a request to output an operation sound (Yes in S1), it determines whether it is in the process of supplying a melody voice signal to the speaker 14 (S2'). When the voice control unit 20 determines that it is not in the process of supplying a melody voice signal to the speaker 14 (No in S2'), it supplies the voice signal of the operation sound to the speaker 14 (S5). As a result, an operation sound such as "beep" and "beep beep" is output from the speaker 14.

[0059] On the other hand, when the voice control unit 20 determines that the voice signal of the melody is being supplied to the speaker 14 (Yes in S2'), the supply of the voice signal of the melody is not interrupted and the track to be cut is determined (S10), and the sound of the voice data of multiple tracks other than the determined track is synthesized with the operation sound (S11). In addition, the voice control unit 20 supplies the synthesized voice signal in which the operation sound is synthesized in the melody to the speaker 14 (S4'). Thus, the operation sound is superimposed on the melody and output from the speaker 14 without interrupting the melody.

[0060] [Third embodiment]

[0061] In the following, other embodiments of the present invention will be described. In addition, for the sake of convenience of description, the same reference numerals are attached to components having the same functions as those described in the above embodiments, and their description will not be repeated.

[0062] In the first and second embodiments, the amplitude (volume) of the operation sound is assumed to be constant, but in the present embodiment, the amplitude of the operation sound can be switched. The amplitude (volume) of the operation sound can be switched, for example, in two stages: large and small.

[0063] The voice control unit 20 switches the width of the amplitude reduction of the voice information of the voice message, or the track to be cut or the number of tracks to be cut among the multiple tracks constituting the melody, when synthesizing, according to the amplitude of the set operation sound. That is, when the amplitude (volume) of the operation sound is set to be large, the amplitude of the voice signal of the voice message is further greatly reduced, and the number of tracks to be cut among the multiple tracks constituting the melody is increased.

[0064] <Modification>

[0065] In the above description, it is described that the voice control unit 20 is constructed in the control unit 10, the speaker 14 and the voice control unit 20 constitute the voice output device 15, and the voice control unit 20 includes a voice signal circuit that synthesizes the voice signal. However, it is also possible to separate the function of the voice synthesis circuit from the voice control unit 20 and provide the voice synthesis circuit separately from the control unit 10.

[0066] Furthermore, although a synthesized sound obtained by synthesizing sounds of a plurality of tracks is used as the melody, it may also be a voice message of a synthesized sound, and the melody does not necessarily need to be a synthesized sound.

[0067] In addition, a device for outputting either a voice message or a melody is described separately, but it can also be configured to perform any of the following: being able to output either a voice message or a melody, determining which one the voice control unit 20 is, whether to reduce the amplitude of the voice signal, and whether to cut the audio track at a stage before setting the voice signal.

[0068] [Example implemented by software]

[0069] The control module of the air purifier 1 (particularly the voice control unit 20 ) may be realized by a logic circuit (hardware) formed on an integrated circuit (IC chip) or the like, or may be realized by software.

[0070] In the latter case, the air purifier 1 is provided with a computer that executes commands of a program as software that realizes each function. The computer is provided with, for example, at least one processor (control device), and at least one computer-readable recording medium storing the program. Moreover, in the computer, the program is read and executed from the recording medium by the processor, thereby achieving the purpose of the present invention. As the processor, for example, a CPU (Central Processing Unit) can be used. As the recording medium, in addition to "non-temporary tangible media", such as ROM (Read Only Memory), magnetic tapes, disks, cards, semiconductor memories, programmable logic circuits, etc. can also be used. In addition, a RAM (Random Access Memory) or the like that expands the program may also be provided. In addition, the program may also be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) that can transmit the program. In addition, one embodiment of the present invention may be implemented even in the form of a data signal embedded in a carrier wave that is embodied by electronic transmission.

[0071] 〔Summarize〕

[0072] The voice output device 15 involved in mode 1 of the present invention is characterized in that it comprises: a speaker 14; and a voice control unit 20, which does not interrupt the supply of the voice signal of the voice message or melody, but synthesizes the operation sound with the voice message or melody and supplies it when it is necessary to output an operation sound during the process of supplying the voice signal of the voice message or melody to the speaker 14.

[0073] The audio output device 15 according to the second aspect of the present invention may be configured such that, in addition to the first aspect, the audio control unit 20 synthesizes the operation sound after reducing the volume of the audio message or melody.

[0074] The voice output device 15 according to aspect 3 of the present invention may be configured such that, in addition to aspect 2, the voice control unit 20 synthesizes the voice signal of the operation sound after reducing the amplitude of the voice signal of the voice message or melody.

[0075] The voice output device 15 according to aspect 4 of the present invention may be configured such that, in addition to aspect 3, the voice control unit 20 reduces the amplitude of the voice signal of the voice message or melody by at least the amplitude of the voice signal of the operation sound.

[0076] The voice output device 15 involved in mode 5 of the present invention can also be constructed as follows: based on mode 2, the voice message or melody is a synthesized sound obtained by synthesizing the sounds of voice data of multiple tracks, and the voice control unit synthesizes the operation sound based on reducing at least one of the multiple tracks.

[0077] The audio output device 15 according to the sixth aspect of the present invention can be configured as follows, in addition to the fifth aspect, wherein the audio control unit includes a track with the lowest pitch among the plurality of tracks in the tracks to be reduced.

[0078] The audio output device 15 according to aspect 7 of the present invention can be configured as follows: in addition to aspect 5, the audio control unit includes a track with the smallest volume among a plurality of tracks in the tracks to be reduced.

[0079] An electric device according to an eighth aspect of the present invention is characterized by including the voice output device 15 described in any one of the first to seventh aspects.

[0080] The present invention is not limited to the above-mentioned embodiments, and various changes can be made within the scope of the claims. The embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Moreover, the technical means disclosed in each embodiment can be combined to form new technical features.

[0081] Description of Reference Numerals

[0082] 1. Air Purifier

[0083] 10: Control Department

[0084] 11: Air Cleaning Department

[0085] 12: Sensor unit

[0086] 13: Operation input unit

[0087] 14: Speaker

[0088] 15: Voice output device

[0089] 20: Voice control unit

Claims

1. A speech output device, characterized in that: have: Speakers; and a voice control unit which synthesizes the operation sound with the voice message or melody to supply a synthesized voice signal without interrupting the supply of the voice signal of the voice message or melody when an operation sound needs to be output during the supply of the voice signal of the voice message or melody to the speaker; The audio control unit reduces the amplitude of the audio signal of the audio message or melody so that the amplitude of the synthesized audio signal becomes less than or equal to the maximum amplitude acceptable to the audio control unit, and then synthesizes the synthesized audio signal with the operation sound to obtain the synthesized audio signal.

2. The speech output device according to claim 1, characterized in that: The audio control unit synthesizes the operation sound after reducing the volume of the audio message or melody.

3. The speech output device according to claim 1, characterized in that: The audio control unit reduces the amplitude of the audio signal of the audio message or melody by at least the amplitude of the audio signal of the operation sound.

4. The speech output device according to claim 2, characterized in that: The voice message or melody is a synthesized sound obtained by synthesizing the sounds of voice data of multiple tracks. The audio control unit synthesizes the operation sound after reducing at least one of the plurality of audio tracks.

5. The speech output device according to claim 4, characterized in that: The audio control unit includes a track with the lowest bass among a plurality of tracks as tracks to be cut.

6. The speech output device according to claim 4, characterized in that: The audio control unit includes a track with the smallest volume among the plurality of tracks in the tracks to be reduced.

7. An electrical device, characterized in that: A voice output device according to any one of claims 1 to 6.

Images