JP2015128209A - Electronic apparatus, changeover method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for detecting a sound listening state regardless of a circumferential environment.SOLUTION: An electronic apparatus 100 includes: a first speaker 24 with softer sound volume; a second speaker 26 capable of outputting sound with sound volume louder than the sound volume of the first speaker 24; and a sensor 22 for measuring a distance from an object. A control section 20 changes over a sound output from the second speaker 26 into a sound output from the first speaker 24 when a distance measured by the sensor 22 becomes smaller than a threshold.

Description

  The present invention relates to a switching technique, and more particularly to an electronic device that switches a speaker for outputting sound, a switching method, and a program.

  In portable terminal devices capable of normal calls and hands-free calls, call switching such as changing the volume of normal calls and hands-free calls is performed by a receiver and a speaker. In order to improve the convenience of the mobile terminal device, the call mode is switched depending on the positional relationship between the device main body and the human body. For example, the position of the apparatus main body is detected by an image captured by a camera provided in the mobile terminal device. A normal call and a hands-free call can be switched based on the image (for example, Patent Document 1).

JP 2008-187221 A

  In a wireless terminal such as a transceiver, there are two methods: listening at a volume that can be heard even without bringing the terminal close to the terminal with a speaker installed in the main body, and listening at a volume that can be heard only by the user. The former is also assumed to be heard by a plurality of people, and is heard at a loud volume that does not bother the surroundings. The latter is effective in cases where only the person can listen and the surrounding people do not want to hear it, or when a large volume disturbs the surroundings. When an image is used to automatically detect each case, the brightness and color are not known at night or in a place not exposed to light, so that detection becomes impossible.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for detecting a state of listening to a voice regardless of the surrounding environment.

  In order to solve the above problems, an electronic device according to an aspect of the present invention measures a distance between a first speaker, a second speaker capable of outputting sound having a volume larger than that of the first speaker, and an object. And a control unit that switches the sound output from the second speaker to the sound output from the first speaker when the distance measured by the sensor becomes shorter than a predetermined threshold value.

  Another aspect of the present invention is a switching method. This method includes a step of acquiring a distance from an object measured by a sensor, and a second speaker capable of outputting a sound having a volume larger than that of the first speaker when the acquired distance becomes shorter than a threshold value. Switching audio output to audio output from the first speaker.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, it is possible to detect a state of listening to voice regardless of the surrounding environment.

It is a figure which shows the structure of the electronic device which concerns on Example 1 of this invention. It is a figure which shows the use condition of the electronic device of FIG. It is a figure which shows another use condition of the electronic device of FIG. It is a figure which shows another use condition of the electronic device of FIG. It is a figure which shows the data structure of the table memorize | stored in the control part of FIG. It is a flowchart which shows the output procedure by the electronic device of FIG. It is a flowchart which shows the adjustment procedure of the volume by the electronic device which concerns on Example 2 of this invention. It is a figure which shows the structure of the electronic device which concerns on Example 3 of this invention. It is a flowchart which shows the output procedure by the electronic device of FIG. It is a figure which shows the structure of the electronic device which concerns on Example 4 of this invention. It is a flowchart which shows the selection procedure of the mode by the electronic device of FIG.

Example 1
Before describing the present invention specifically, an outline will be given first. Embodiments described herein relate generally to an electronic device that is a wireless device such as a transceiver. As described above, two states are assumed as the state of listening to the sound output from the electronic device. One is a remote state where the user listens to the sound without bringing his ear close to the speaker. This can be said to be a state in which a plurality of users listen to sound around the speaker. The other is a proximity state, in which the user listens to the sound with his ear close to the speaker. This can be said to be a state of a secret call. Comparing the remote state and the proximity state, the distance between the speaker and the ear is closer in the latter than in the former. The electronic device is louder than the first speaker because of the remote state, in addition to the speaker (hereinafter referred to as “first speaker”) that can be heard only by one user like a telephone because of the proximity state. Speaker (hereinafter referred to as “second speaker”).

  Here, in order to detect a remote state and a proximity state regardless of the surrounding environment, the electronic device includes a sensor. The sensor measures the distance from the user's head. When the distance is greater than or equal to the threshold, the electronic device detects a remote state, and when the distance is shorter than the threshold, the electronic device detects a proximity state. For example, when the state of the user's head and sensor changes from a state that is equal to or greater than the threshold value to a state that is shorter than the threshold value, the electronic device detects a change from the remote state to the proximity state. Furthermore, the electronic device switches the sound output from the second speaker to the sound output from the first speaker.

  FIG. 1 shows a configuration of an electronic device 100 according to the first embodiment of the present invention. The electronic device 100 includes an antenna 10, a communication unit 12, an audio processing unit 14, an IF unit 16, a microphone 18, a control unit 20, a sensor 22, a first speaker 24, a second speaker 26, and an operation unit 28.

  The antenna 10 receives a radio signal from a radio device (not shown) and transmits the radio signal to a radio device (not shown). The antenna 10 outputs a received radio signal to the communication unit 12, and the antenna 10 inputs a radio signal to be transmitted from the communication unit 12. The communication unit 12 receives a radio signal from the antenna 10 and demodulates the radio signal. The communication unit 12 outputs the demodulated data to the audio processing unit 14. On the other hand, the communication unit 12 receives data from the audio processing unit 14 and performs modulation using the data. The communication unit 12 outputs a radio signal to the antenna 10. The communication unit 12 may execute encoding and demodulation for error correction.

  The voice processing unit 14 receives data from the communication unit 12 and performs decoding when voice coding is performed on the data. The audio processing unit 14 outputs an audio signal as a decoding result to the IF unit 16. On the other hand, the audio processing unit 14 receives the audio signal from the IF unit 16 and performs audio encoding on the audio signal. The speech processing unit 14 outputs data that is the result of speech encoding to the communication unit 12.

  The IF unit 16 is an interface among the audio processing unit 14, the microphone 18, and the control unit 20. The IF unit 16 outputs the audio signal from the audio processing unit 14 to the control unit 20. Further, the IF unit 16 outputs the audio signal from the microphone 18 to the audio processing unit 14. Further, the IF unit 16 switches the communication unit 12, the voice processing unit 14, the microphone 18, the control unit 20, the sensor 22, the first speaker 24, and the second speaker 26 in accordance with an instruction from the user received in the operation unit 28. Make it work. For example, if the instruction from the user is a call, these are operated so as to execute the call processing. The operation unit 28 includes buttons and the like, and can accept an instruction from the user.

  The microphone 18 inputs a voice uttered by the user. The microphone 18 converts the sound into an audio signal as an electric signal and outputs the audio signal to the IF unit 16. Since a well-known technique should just be used for the microphone 18, description is abbreviate | omitted here. FIG. 2 shows how the electronic device 100 is used. A sensor 22 and a first speaker 24 are disposed on the upper surface of the electronic device 100. In addition, a second speaker 26 is disposed at a lower portion on the one surface side of the electronic device 100. Further, the microphone 18 is disposed between the first speaker 24 and the second speaker 26. In addition, arrangement | positioning of the microphone 18, the sensor 22, the 1st speaker 24, and the 2nd speaker 26 is not limited to FIG. FIG. 2 illustrates use of the electronic device 100 in the remote state described above. The user holds the electronic device 100 in his / her hand and performs generation toward the microphone 18. Returning to FIG.

  The first speaker 24 is a speaker to be used in the proximity state described above. The first speaker 24 receives an audio signal from the control unit 20, converts the audio signal into audio, and outputs the audio. Whether or not the first speaker 24 outputs sound is controlled by the control unit 20. FIG. 3 shows another usage situation of the electronic device 100. This corresponds to the use of the electronic device 100 in the proximity state described above. The electronic device 100 is shown as in FIG. The user brings his ear close to the first speaker 24 and listens to the sound output from the first speaker 24. In such a case, the volume of the sound output from the first speaker 24 is set to a volume that can be heard only by the close ear. Here, the close distance is, for example, about 5 cm. Therefore, a user who is farther from the first speaker 24 than this cannot hear the sound from the first speaker 24. Therefore, the first speaker 24 is used for a secret call. Further, the user utters toward the microphone 18 in the state shown in FIG. Returning to FIG.

  The second speaker 26 is a speaker provided separately from the first speaker 24. Similarly to the first speaker 24, the second speaker 26 also receives an audio signal from the control unit 20, converts the audio signal into sound, and outputs the sound. Whether or not the second speaker 26 outputs sound is controlled by the control unit 20. FIG. 4 shows still another usage situation of the electronic device 100. This corresponds to the use of the electronic device 100 in the above-described remote state, and is the same as FIG. The user listens to the sound output from the second speaker 26 while keeping his ear away from the second speaker 26. That is, the user speaks his / her face from the electronic device 100 and listens to the voice. Here, the second speaker 26 can output sound having a volume higher than that of the first speaker 24. It is also possible for a plurality of users to listen to audio simultaneously using the second speaker 26. Returning to FIG.

  The sensor 22 measures the distance to the object. An example of the object is the user's head. As shown in FIGS. 2 to 4, the distance between the sensor 22 and the first speaker 24 is shorter than the distance between the sensor 22 and the second speaker 26. Since a known technique may be used for measuring the distance by the sensor 22, the description thereof is omitted here. The sensor 22 periodically performs measurement and outputs a distance as a measurement result to the control unit 20.

  The control unit 20 selects the output from the first speaker 24 or the output from the second speaker 26 based on the distance from the sensor 22. FIG. 5 shows the data structure of the table stored in the control unit 20. As shown, a condition column 200 and an output column 202 are included. The condition column 200 indicates a condition for the distance, and the output column 202 indicates an output destination. The upper part of the condition column 200 corresponds to the remote state, and the lower part corresponds to the proximity state. The control unit 20 selects the second speaker 26 if the distance is greater than or equal to the threshold, and selects the first speaker 24 if the distance is shorter than the threshold.

  As described above, when the distance measured by the sensor 22 changes from the remote state where the distance measured by the sensor 22 is equal to or greater than the threshold value, the control unit 20 changes the distance from the second speaker 26. The sound output is switched to the sound output from the first speaker 24. That is, the control unit 20 switches the sound output from the second speaker 26 to the sound output from the first speaker 24 when the distance measured by the sensor 22 is shortened. On the other hand, when the control unit 20 changes from the proximity state to the remote state, the control unit 20 switches the sound output from the first speaker 24 to the sound output from the second speaker 26. The first speaker 24 and the second speaker 26 are automatically switched by the control unit 20.

  Further, the control unit 20 outputs a sound from the first speaker 24 when the distance measured by the sensor 22 changes from a remote state where the distance measured by the sensor 22 is greater than or equal to the threshold to a proximity state where the distance measured by the sensor 22 is shorter than the threshold. Then, the audio output from the second speaker 26 may be stopped. That is, the control unit 20 may perform control so that the second speaker does not output when the distance measured by the sensor 22 is shorter than the threshold value.

  Further, the control unit 20 maintains the output from the first speaker 24 regardless of the distance measured by the sensor 22, and the distance measured by the sensor 22 from the remote state where the distance measured by the sensor 22 is equal to or greater than the threshold value. When the proximity state shorter than the threshold value is changed, the output of sound from the second speaker 26 may be stopped. That is, the control unit 20 may perform control so that the second speaker does not output when the distance measured by the sensor 22 is shorter than the threshold value.

  Further, the control unit 20 may set different threshold values for determining that the remote state is changed to the proximity state and different threshold values for determining that the remote state is changed to the remote state. . For example, the threshold value for determining that the remote state has changed from the remote state to the proximity state is greater than the threshold value for determining that the remote state has become the remote state. May be. That is, hysteresis may be provided for the threshold value.

  This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, it can be realized by a program loaded in the memory, but here it is realized by their cooperation. Draw functional blocks. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof. In addition, these programs may be read from a recording medium and loaded into a computer, or may be transmitted via a communication network and loaded into a computer.

  An operation of electronic device 100 having the above configuration will be described. FIG. 6 is a flowchart illustrating an output procedure by the electronic device 100. The sensor 22 measures the distance (S10). When the distance is equal to or greater than the threshold value (Y in S12), the control unit 20 causes the second speaker 26 to output sound (S14). On the other hand, when the distance is not equal to or greater than the threshold value (N in S12), the control unit 20 causes the first speaker 24 to output a sound (S16).

  According to the present embodiment, since the state of listening to the voice is detected based on the distance, the influence of the surrounding environment such as brightness and color can be reduced. Moreover, since the distance between the sensor and the first speaker is shorter than the distance between the sensor and the second speaker, the detection accuracy of the proximity state can be improved. In addition, since the proximity state and the remote state are automatically switched, the convenience of the user can be improved. In addition, when the user's head approaches the electronic device, the output from the second speaker is automatically stopped by detection of the sensor, and listening by the first speaker becomes possible, so that a secret conversation can be realized. In addition, when a secret conversation is required in an electronic device, a secret conversation equivalent to that of a mobile phone can be realized by using only the main body without carrying a connection device such as an earphone or a headphone.

  In addition, even after the user decides that confidential conversation is not necessary and the user carries only the electronic device and the situation changes and the confidential conversation is necessary, the switching operation and the adjustment of the speaker volume are performed. It is possible to realize a secret conversation through the first speaker without doing so. Moreover, since the output from a 2nd speaker will be stopped if it changes from a remote state to a proximity | contact state, the situation where the content of the conversation is alert | reported to the circumference | surroundings can be avoided. Also, since the threshold value for determining that the remote state has changed to the close state and the threshold value for determining that the remote state has changed to the remote state are set to different values, audio is output. The situation where the speaker to be changed is frequently changed can be avoided.

(Example 2)
Next, Example 2 will be described. As in the first embodiment, the second embodiment relates to an electronic device that detects a remote state and a proximity state and switches a speaker according to the detected state. In the second embodiment, in addition to the first embodiment, the volume of the sound output from the speaker is changed according to the distance measured by the sensor. The configuration of the electronic device 100 according to the second embodiment is the same type as that in FIG. Here, it demonstrates centering on the difference with Example 1. FIG.

  The control unit 20 inputs the distance measured by the sensor 22. As in the first embodiment, the control unit 20 determines the proximity state or the remote state. At that time, the threshold value is used as in the first embodiment. In the second embodiment, this threshold value is referred to as a “first threshold value”. When detecting the remote state, the control unit 20 adjusts the volume of the sound output from the second speaker 26 according to the distance measured by the sensor 22. For example, the sound volume at a predetermined distance longer than the first threshold distance increases as the distance increases, and decreases as the distance decreases. At that time, the control unit 20 may increase the volume of the sound output from the second speaker 26 stepwise as the distance measured by the sensor 22 becomes longer. Note that a “second threshold value” that is longer than the first threshold value is also defined, and the control unit 20 determines that the measured distance is equal to or greater than the second threshold value. The volume of the sound output from the second speaker 26 is fixed to the maximum volume set by the user. Since the volume from the first speaker 24 and the second speaker 26 is set by the user, the above control may be performed with the volume as the maximum volume.

  Since the volume of the sound output from the first speaker 24 is a volume that can be heard only by the close ear, it is not necessary to change the volume according to the distance measured by the sensor 22. However, in order to reduce power consumption, the control unit 20 may reduce the volume from the first speaker 24 when it is determined that the remote state is established.

  An operation of electronic device 100 having the above configuration will be described. FIG. 7 is a flowchart illustrating the procedure for adjusting the volume by the electronic device 100 according to the second embodiment of the invention. The sensor 22 measures the distance (S20). When the distance is not equal to or greater than the first threshold value (N in S21), the control unit 20 causes the first speaker 24 to output sound (S22). On the other hand, when the distance is equal to or greater than the first threshold value (Y in S21) and is equal to or greater than the second threshold value (Y in S23), the control unit 20 outputs the sound from the second speaker 26 at the maximum volume. Output (S24). On the other hand, when it is not more than a 2nd threshold value (N of S23), the control part 20 is made to output an audio | voice from the 2nd speaker 26 with the volume according to the distance below a maximum volume (S25).

  According to the embodiment of the present invention, since the volume is adjusted according to the measured distance, the volume of the second speaker decreases as the face approaches, and the volume of the second speaker increases as the face moves away, thereby improving user convenience. it can. Further, since the volume is increased stepwise as the measured distance becomes longer, the processing can be simplified.

(Example 3)
Next, Example 3 will be described. Example 3 relates to an electronic device that outputs sound from a speaker corresponding to each of a remote state and a proximity state, as in the past. Until now, the remote state and the proximity state are automatically detected, and the first speaker and the second speaker are switched. If a change from the proximity state to the remote state is erroneously detected, there is a possibility that the first speaker is automatically switched to the second speaker regardless of the secret call. In order to cope with this, the electronic device according to the third embodiment automatically detects a change from the remote state to the proximity state, but the change from the proximity state to the remote state is performed based on an instruction from the user. Detect manually.

  FIG. 8 shows a configuration of the electronic device 100 according to the third embodiment of the present invention. The electronic device 100 includes an antenna 10, a communication unit 12, an audio processing unit 14, an IF unit 16, a microphone 18, a control unit 20, a sensor 22, a first speaker 24, a second speaker 26, an operation unit 28, and a reception unit 30. . Here, it demonstrates centering on the difference with FIG.

The receiving unit 30 is a button for receiving an instruction from the user. The receiving unit 30 may be configured integrally with the operation unit 28. The receiving unit 30 outputs the received instruction to the control unit 20. When the distance measured by the sensor 22 changes from a remote state where the distance measured by the sensor 22 is greater than or equal to a threshold value to a proximity state where the distance measured by the sensor 22 is shorter than the threshold value, the control unit 20 outputs the sound from the second speaker 26. Switching to output of sound from the first speaker 24 is performed.
When the control unit 20 receives an instruction from the reception unit 30, the control unit 20 determines whether the distance measured by the sensor 22 is a close state shorter than a threshold value or a remote state equal to or greater than the threshold value. The control unit 20 maintains the sound output of the first speaker when it is determined as the proximity state, and outputs the sound output from the first speaker 24 as the sound output from the second speaker 26 when it is determined as the remote state. Switch to

  In addition, the control unit 20 determines whether the distance measured by the sensor 22 is a proximity state shorter than the threshold value or a remote state equal to or greater than the threshold value. The sound output from the first speaker 24 may be switched to the sound output from the second speaker 26 when the sound output from the first speaker is maintained, the remote state is determined, and the instruction is received by the reception unit 30. .

  Moreover, at least any one notification means such as a display unit, an LED, and a buzzer (not shown) may be provided, and the notification means may notify that it is in a secret call state even in a remote state.

  An operation of electronic device 100 having the above configuration will be described. FIG. 9 is a flowchart illustrating an output procedure performed by the electronic device 100. When the second speaker 26 is used (Y in S30), when the distance measured by the sensor 22 becomes shorter than the threshold (Y in S32), the control unit 20 switches to using the first speaker 24 (S34). ). If the distance measured by the sensor 22 is not shorter than the threshold value (N in S32), step 32 is skipped. When the second speaker is not used (N in S30), when the receiving unit 30 receives an instruction (Y in S36), if the distance measured by the sensor 22 is equal to or greater than the threshold value (Y in S37), control is performed. The unit 20 switches to using the second speaker 26 (S38). If the distance measured by the sensor 22 is not greater than or equal to the threshold value (N in S37), step 38 is skipped. If the receiving unit 30 does not accept the instruction (N in S36), steps 37 and 38 are skipped. In S37, the determination may be performed before S36.

  According to the embodiment of the present invention, since the switching from the remote state to the proximity state is automatically detected, the convenience of the user can be improved, and the switching from the proximity state to the remote state is detected manually. The call can be prevented from being heard around. Moreover, it can alert | report to a user that it is alert | reported that the secret call state is maintained by an alerting | reporting means.

Example 4
Next, Example 4 will be described. The fourth embodiment relates to an electronic device as before. Example 4 corresponds to a combination of Example 1 and Example 3. The electronic device according to the fourth embodiment can execute two modes in advance, and selects and executes one of the modes. One mode (hereinafter referred to as “first mode”) corresponds to the first embodiment, and the other mode (hereinafter referred to as “second mode”) corresponds to the third embodiment.

  FIG. 10 shows a configuration of an electronic device 100 according to the fourth embodiment of the present invention. The electronic device 100 includes an antenna 10, a communication unit 12, an audio processing unit 14, an IF unit 16, a microphone 18, a control unit 20, a sensor 22, a first speaker 24, a second speaker 26, an operation unit 28, a reception unit 30, and a selection. Part 32 is included. Here, the difference from the first and third embodiments will be mainly described.

  The selection unit 32 selects one of the first mode and the second mode. The selection may be made based on an instruction received in the operation unit 28. The selection unit 32 outputs the selection result to the control unit 20. When the first mode is selected by the selection unit 32, the control unit 20 performs the same process as in the first embodiment. On the other hand, when the second mode is selected by the selection unit 32, the control unit 20 performs the same process as in the third embodiment.

  An operation of electronic device 100 having the above configuration will be described. FIG. 11 is a flowchart illustrating a mode selection procedure performed by the electronic device 100. When the first mode is selected by the selection unit 32 (Y in S40), the control unit 20 executes the first mode (S42). When the first mode is not selected by the selection unit 32 (N in S40), the control unit 20 executes the second mode (S44).

  According to the embodiment of the present invention, since one of the two modes is selected, an operation suitable for the situation can be realized.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

  10 antenna, 12 communication unit, 14 sound processing unit, 16 IF unit, 18 microphone, 20 control unit, 22 sensor, 24 first speaker, 26 second speaker, 28 operation unit, 100 electronic device.

Claims (9)

A first speaker;
A second speaker capable of outputting sound having a volume greater than that of the first speaker;
A sensor for measuring the distance to the object;
A control unit that switches the sound output from the second speaker to the sound output from the first speaker when the distance measured by the sensor is shorter than a predetermined threshold;
An electronic device comprising:   The electronic apparatus according to claim 1, wherein a distance between the sensor and the first speaker is shorter than a distance between the sensor and the second speaker.   When the distance measured by the sensor changes from a remote state where the distance measured by the sensor is equal to or greater than a threshold value to a proximity state where the distance measured by the sensor is shorter than the threshold value, the control unit outputs the sound from the second speaker. The voice output from the first speaker is switched to the voice output from the second speaker when the voice output from the first speaker is switched to a remote state. Or the electronic device of 2. A reception unit for receiving instructions from the user;
When the distance measured by the sensor changes from a remote state where the distance measured by the sensor is equal to or greater than a threshold value to a proximity state where the distance measured by the sensor is shorter than the threshold value, the control unit outputs the sound from the second speaker. 2. The voice output from the first speaker is switched to the voice output from the second speaker when the instruction is received by the reception unit, and the voice output from the first speaker is switched to the voice output from the second speaker. Or the electronic device of 2. A reception unit for receiving instructions from the user;
A selection unit that selects one of the first mode and the second mode;
(1) When the first mode is selected in the selection unit, the distance measured by the sensor is less than the threshold from a remote state where the distance measured by the sensor is greater than or equal to the threshold. When the state changes to a short proximity state, the sound output from the second speaker is switched to the sound output from the first speaker. When the state changes from the proximity state to the remote state, the sound output from the first speaker is changed to the first output. (2) When the second mode is selected in the selection unit, the sound output from the second speaker is changed to the first speaker when the remote mode is changed to the proximity state. When the reception unit receives an instruction, the voice output from the first speaker is switched to the voice output from the second speaker. The electronic device according to claim 1 or 2, characterized in Rukoto.   The control unit adjusts the volume of the sound output from the second speaker in accordance with the distance measured by the sensor in a range equal to or less than the maximum volume of the second speaker set by the user. The electronic device according to claim 3.   The electronic device according to claim 6, wherein the control unit increases the volume of the sound output from the second speaker stepwise as the distance measured by the sensor increases. Obtaining a distance from an object measured by a sensor;
When the acquired distance is shorter than the threshold value, the step of switching the output of the sound from the second speaker capable of outputting the sound having a volume larger than the volume of the first speaker to the output of the sound from the first speaker;
A switching method comprising: Obtaining a distance from an object measured by a sensor;
When the acquired distance is shorter than the threshold value, the step of switching the output of the sound from the second speaker capable of outputting the sound having a volume larger than the volume of the first speaker to the output of the sound from the first speaker;
A program that causes a computer to execute.

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