JP2001025084A - Speaker device - Google Patents

Abstract

(57) [Summary] [Problem] To improve the directivity of a speaker and the range in which sound can be heard.
Depending on the situation of the people in front of the speakers. SOLUTION: A plurality of speakers are arranged in a plurality of rows in a speaker housing. By grouping a plurality of speakers into several groups and controlling the amplitude and phase of the acoustic signal for each group, the directivity and the spread of sound are changed. This speaker is provided in the information terminal. Depending on the usage status of information terminals,
The information corresponding to the user of the information terminal is provided by changing the directivity and frequency characteristics of the speaker. In addition, a person in front of the speaker is photographed by a camera, the directivity is changed according to the number of persons recognized, and appropriate announcements and music are played.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device, and more particularly to a speaker device that changes the directivity of a speaker according to a situation in front of the speaker.

[0002]

2. Description of the Related Art A conventional speaker directivity control method includes a method of combining a plurality of speakers and changing the phases of acoustic signals in accordance with the arrangement of the speakers so as to achieve narrow directivity. Was. There has also been a method of controlling directivity by combining horn speakers with narrow directivity.

[0003] For example, a directivity control type speaker system disclosed in Japanese Patent No. 2610991 arranges a plurality of speakers and controls its directivity pattern. Find the optimum filter characteristics by nonlinear optimization method,
By driving the speaker unit with the FIR filter in which the optimum filter characteristic is set, the directivity can be controlled for each frequency from low to middle and high frequencies, and the directivity pattern can have a certain degree of arbitrariness.

The directional speaker device disclosed in Japanese Patent No. 2846363 discloses a loudspeaker system in which a plurality of speakers are arranged at an appropriate distance from each other so that a strong sound in a specific direction is generated by interference of sound waves. Pressure is obtained. By arranging three loudspeakers in a line, inputting a signal through a phase shift circuit to both loudspeakers and a high-pass filter circuit to the center loudspeaker, in the low frequency range, the frequency determined by the distance between the two loudspeakers, The treble range can have narrow directivity over a wide range up to the reproduction limit frequency.

[0005]

However, in the conventional speaker system, changing the directivity and the audible range of the speaker cannot be realized without using a complicated circuit.
There is a problem that it is difficult to control characteristics such as the directivity of a speaker.

An object of the present invention is to solve the above-mentioned conventional problems and to easily control the directivity of a speaker.

[0007]

According to the present invention, there is provided a speaker device comprising: a speaker housing; a plurality of speakers arranged in one or more rows inside the speaker housing; Means for changing the audible region of the speaker by changing the acoustic signal for driving each speaker and controlling the directivity.
With this configuration, it is possible to easily control the directivity of the loudspeaker and change the audible direction and range.

Also, a center speaker group arranged at the center of the speaker housing, a center outer speaker group arranged between the center and the periphery of the speaker housing, and a center speaker group arranged at the periphery of the speaker housing. A means is provided for changing the directivity by changing the amplitude and phase of the acoustic signal driving each of the speaker groups of the outer speaker group, thereby changing the audible area of the speaker. With this configuration, it is possible to easily change the direction and range in which the sound of the speaker can be heard.

Further, a means for optimizing the audible area of the speaker by changing the amplitude and phase of the acoustic signal for driving the center outside speaker group is provided. With this configuration, one speaker group can be controlled to optimize the range in which sound can be heard.

In addition, a camera installed in the speaker housing, means for analyzing the image of the camera, and means for switching the speaker between wide directivity and narrow directivity according to the analysis result are provided. With this configuration, it is possible to recognize the situation of a person in front of the speaker with the camera and provide audio information with directivity according to the number of persons.

Further, there are provided means for analyzing the image of the camera to recognize that a person has stopped in front of the speaker housing, and means for switching the speaker to narrow directivity according to the recognition result. With this configuration, audio information can be provided only to the person in front of the speaker.

Further, there are provided means for analyzing a camera image to recognize that a person has stopped in front of the speaker housing, and means for outputting music or announcement corresponding to the individual from the speaker according to the recognition result. Was. With this configuration, personal audio information can be provided.

A means for analyzing the image of the camera to recognize that a person is not stopped in front of the speaker housing;
Means for switching the speaker to a wide directivity according to the recognition result. With this configuration, it is possible to provide audio information intended for many people.

A means for analyzing an image of the camera to recognize that a person is not stopped in front of the speaker housing;
Means for outputting music or announcements corresponding to a plurality of persons from a speaker according to the recognition result. With this configuration, it is possible to reach a large number of people.

Further, there are provided means for analyzing a camera image to recognize a person's iris, means for specifying a person from iris data, and an information terminal for selecting and providing information on the specified person. . With this configuration, audio information for the specified person can be provided.

Further, there are provided means for analyzing the image of the camera to recognize the position of the person, and means for switching the speaker to narrow directivity toward the position of the person according to the recognition result.
With this configuration, audio information can be provided to a person even if the position of the person changes.

In addition, there is provided means for controlling the sound pressure in front of the speaker to be constant regardless of the directivity of the speaker. With this configuration, audio information can always be provided with a sound of a fixed volume.

Further, there are provided a connecting means for connecting various information terminals, a means for detecting that the connected information terminal has been operated, and a means for switching the speaker to narrow directivity according to the detection result. With this configuration,
Audio information can be provided only to the person who operates the terminal.

Further, a means for switching the speaker to the wide directivity when the operation of the information terminal is not detected is provided. With this configuration, voice information can be provided to many people near the information terminal.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION
A speaker housing, a plurality of speakers arranged in a row or a plurality of rows inside the speaker housing, and changing the audible area of the speaker by controlling a directivity by changing an acoustic signal for driving each speaker. Means for controlling the sound signal to the speaker to change the directivity.

The second aspect of the present invention is the first aspect of the present invention.
In the speaker device described in the above, a center speaker group arranged in the center portion of the speaker housing, a center outside speaker group arranged in the middle between the center portion and the peripheral portion of the speaker housing, and A means for changing the audible area of the speaker by changing the directivity by changing the amplitude and phase of an acoustic signal for driving each speaker group of the outer speaker group arranged in the peripheral portion, the speaker group being provided. It has the effect of changing the directivity by controlling the amplitude and phase every time.

The third aspect of the present invention is the second aspect of the present invention.
The speaker device according to claim 1, further comprising means for optimizing an audible region of the speaker by changing a phase of an acoustic signal for driving the center outside speaker group. Has the effect of optimizing

According to a fourth aspect of the present invention, in the speaker device according to the first or second aspect, a camera installed in the speaker housing, means for analyzing an image of the camera, and Means for switching the speaker between a wide directivity and a narrow directivity is provided, and has an effect of observing the situation with a camera and changing the directivity according to the situation.

According to the fifth aspect of the present invention, the fourth aspect of the present invention is provided.
The speaker device according to claim 1, further comprising: means for analyzing the image of the camera to recognize that a person has stopped in front of the speaker housing, and means for switching the speaker to narrow directivity according to a recognition result. It has the effect of emitting a sound to a person stopped in front of the camera.

The invention according to claim 6 of the present invention is the invention according to claim 4.
In the speaker device described above, means for analyzing an image of the camera to recognize that a person has stopped in front of the speaker housing, and outputting music or an announcement corresponding to an individual from the speaker according to the recognition result. Means for outputting a personal sound toward a person stopped in front of the camera.

The invention according to claim 7 of the present invention is directed to claim 4
The speaker device according to claim 1, further comprising: a unit that analyzes an image of the camera to recognize that a person is not stopped in front of the speaker housing; and a unit that switches the speaker to a wide directivity according to a recognition result. When there is no person in front of the camera, it has the effect of emitting sound over a wide range.

The invention according to claim 8 of the present invention is directed to claim 4
The speaker device according to claim 1, further comprising: means for analyzing an image of the camera to recognize that a person is not stopped in front of the speaker housing; and music or an announcement corresponding to a plurality of people from the speaker according to a recognition result. Means for outputting a sound for a large number of people when the person is not stopped in front of the camera.

The ninth aspect of the present invention is the fourth aspect of the present invention.
In the speaker device described in the above, means for analyzing the image of the camera to recognize the iris of a person, means for specifying the person from the iris data, and an information terminal for selecting and providing information on the specified person Is provided.
It has the effect of providing information to the identified individuals.

According to a tenth aspect of the present invention, in the speaker device of the fourth aspect, means for recognizing a position where a person is present by analyzing an image of the camera, and connecting the speaker in accordance with a recognition result. Means for switching to narrow directivity directed to a position, and has an effect of emitting a sound toward a place where a person is present.

According to an eleventh aspect of the present invention, in the speaker device according to the first aspect, means for controlling the sound pressure in front of the speaker to be constant regardless of the directivity of the speaker is wide. It has the effect of always making the loudness of the front sound constant.

According to a twelfth aspect of the present invention, in the speaker device according to the first or second aspect, a connecting means for connecting various information terminals, and a means for detecting that the connected information terminal is operated are provided. Means for switching the speaker to narrow directivity according to the detection result,
This has the effect of producing a sound toward the person operating the POS.

According to a thirteenth aspect of the present invention, in the speaker device according to the twelfth aspect, means for switching the speaker to a wide directivity when the operation of the information terminal is not detected is provided. This has the effect of producing a sound toward the person operating the information terminal.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described in detail with reference to FIGS.

(First Embodiment) In a first embodiment of the present invention, a plurality of speakers are arranged in a plurality of rows inside a housing, cameras are installed in the housing, and information of camera images is provided. Is a speaker device that controls the amplitude and phase of an acoustic signal for each group of speakers to change the audible range of the speakers.

FIG. 1 is a diagram showing an arrangement of speaker devices according to the first embodiment of the present invention. In FIG. 1, a speaker housing 101 is a box that houses a plurality of speakers. A plurality of speakers 118, 113, 108, 102, 103, 110, 115, and 120 are arranged in a row in the upper half of the speaker housing 101. Speakers 119, 114, 109, 1 in lower half
04, 105, 111, 116 and 121 are arranged in a line. These speakers are connected to 1stSP106, 2ndSP112, 3rdSP11
The 7th and 4th SPs 122 are grouped and arranged.
The camera 107 is arranged in the speaker.

A plurality of speakers 102-105, 108-111, 11
3 to 116 and 118 to 121 are arranged in a plurality of rows and arranged in one housing 101. The plurality of speakers are grouped into a plurality of groups for effective directivity control. Each group of speakers has its own function. The 1st SP 106 located at the center shares the basic performance of front sound pressure and frequency characteristics, the 2nd SP 112 shares directivity control, the 3rd SP 117 and the 4th SP 122 share directivity and frequency characteristics, and each group is there. In this example, the speakers are arranged in two rows in the horizontal direction, but they may be arranged in one row or in a circular shape.

FIG. 2 is a diagram showing the directivity of the speaker device according to the first embodiment of the present invention. In FIG. 2, a wide directivity 201 is a line indicating a range in which sound reaches when directivity is controlled widely. The narrow directivity 202 is a line indicating a range where sound can reach when the directivity is controlled to be narrow. The speakers 203 indicate all speakers arranged in the housing. The maximum sound pressure point 204 is a point where the sound is heard best.

FIG. 3 is a system diagram of a control circuit of the speaker device according to the first embodiment of the present invention. In FIG. 3, a sound source 1 (301) is a first sound source. Sound source 2 (302)
Is a second sound source. The sound source switch 303 is means for switching between the first sound source and the second sound source. The amplification device 304
This is a device that amplifies the signals of the sound source 1 (301) and the sound source 2 (302) and supplies them to each speaker. The 1st SP 315 is a speaker in the center group. The 2nd SP 316 is the speaker just outside the center group. The 3rdSP 317 is a speaker further outside the center group. 4thSP 318 is the outermost speaker.

ATTs 305, 312, 313, 314 are attenuators. The control unit 307 is a circuit that controls the amplitude and the phase.
The control unit input 306 is a unit for inputting control data.
The information terminal I / F 320 is a unit for connecting a POS or the like. The CPU 311 is a processing device that controls each unit. The camera 308 is a camera that takes an image of a range where sound from a speaker reaches. The video amplifier 309 is a circuit that amplifies the video signal of the camera. The A / D 310 is a circuit that converts a video signal into a digital signal. The memory 319 is a storage device that stores digital video signals.

The operation of the speaker device according to the first embodiment of the present invention configured as described above will be described. For the 1st to 4th speaker groups shown in FIG. 1, the control circuit shown in FIG. 3 controls the amplitude and phase of the acoustic signal for driving the speakers, as shown in FIG.
The directivity of the speaker 203 can be wide directivity 201 or narrow directivity 202
Select one of

As shown in the control circuit diagram of FIG.
For each of the speaker groups of P315, 2ndSP316, 3rdSP317, and 4thSP318, the audio signal is controlled in group units. In order to make the speakers have wide directivity characteristics, the same acoustic signal is input to each speaker via the attenuators ATT312, 313, 314 provided for each speaker. In this case, the characteristics are similar to those of the wide directivity 201 in the directivity explanatory diagram of FIG. 2, and the sound can be provided over a wide range. A wide range of services can be provided by incorporating this speaker device into various information service providing devices in street corners and convenience stores, kiosk terminal devices, and ATM devices.

The case where the directivity of the speaker is controlled based on the image of the camera will be described. As shown in FIG.
A camera 107 is provided on the front of the speaker housing. By analyzing the image of the camera, a person coming to the speaker or the information terminal having the speaker is detected.

A case where the directivity of the speaker is narrowed according to the system diagram of the control circuit shown in FIG. 3 will be described. camera
The image photographed in 308 is amplified by the video amplifier 309. The video signal is digitized by the A / D converter 310. The digitized image information is stored in the memory 319 by the CPU 311. When the CPU 311 analyzes the image and recognizes that a person has arrived, the CPU 311 outputs a switching signal to the sound source switch 303 to select one of the sound sources.

Further, the ATTs 312 and 31
The amplitude control of the acoustic signal is performed so that the attenuation of 3, 314 becomes 312 <313 <314. By controlling the amplitude of the acoustic signal input to the speaker, the directivity of the speaker is set to the narrow directivity 202 shown in the directivity diagram of FIG. In this way, since the sound is concentrated only on the person operating the information terminal, the person operating the information terminal can operate without worrying about other people.

When the directivity control of the speaker is performed by phase synthesis, when the wide directivity 201 and the narrow directivity 202 shown in FIG. 2 are switched, the maximum sound pressure point 204 is set to the same level. It is technically difficult. Therefore, the ATT 305 is controlled by a signal from the control unit 307 in FIG. Specifically, a certain sound is output from the amplifying device 304 at the manufacturing stage, and the directivity is switched from the wide directivity to the narrow directivity, and the control signal of the attenuator is determined so that the sound pressure becomes the same. The value of this control signal is written from the control unit input 306 to the CPU 311. When changing the directivity of the speaker, this value is used so that the same sound pressure is obtained. Or, based on the speaker specifications,
The maximum sound pressure when the directivity is changed may be calculated and written in the CPU, and control may be performed so that the same sound pressure is obtained even when the directivity is switched.

The control unit for controlling the directivity of the speaker includes an information terminal I / F 320 with various information terminals. When an information signal is input to the information terminal, control for changing the directivity is performed.
When no one is controlling the information terminal, it has a wide directivity and provides general information services. When the information terminal is operated, the direction is changed to narrow directivity for service to the operator or the customer.

As described above, in the first embodiment of the present invention, the speaker device is configured such that a plurality of speakers are arranged in a plurality of rows inside the housing, the cameras are installed in the housing, and a camera image is formed. Based on the information, the amplitude and phase of the sound signal are controlled for each group of speakers to change the audible range of the speakers, so that the sound is properly directional according to the situation of the person in front of the speakers. Information can be provided.

(Second Embodiment) In a second embodiment of the present invention, a speaker is provided in an information terminal device, the situation of a person operating the terminal device is recognized, and appropriate information is given according to the situation. It is a speaker device that provides appropriate audio information with a wide sound spread and directivity.

FIG. 4 is a system diagram of a speaker device according to a second embodiment of the present invention. In FIG. 4, a sound source 1 (401) is a first sound source, for example, an announcement sound source for individuals. The sound source 2 (402) is a second sound source, for example, an announcement sound source for a large number of people. The sound source switch 403 is a circuit for switching between the sound source 1 and the sound source 2. The amplifying device 404
This is a circuit that amplifies the signal of the sound source. ATT405, 413, 41
5, 422 and 423 are attenuators. The phase inversion 412 is a circuit for inverting the phase of the audio signal. The control unit 410 is a circuit that controls an attenuator, a filter, and the like. Filter 41
Reference numeral 4 denotes a circuit for changing a frequency component of the acoustic signal. The control input 420 is a means for inputting a control signal. The information terminal I / F 426 is means for connecting an information terminal device.
The 1st SP 416 is a central group of speakers. 2ndSP4
17 is the speaker just outside the center group. 3rdSP
418 is a speaker further outside the center group. 4th
SP419 is the outermost speaker.

A sound source 1 (401) and a sound source 2 (402), which are sound sources of speakers, are connected to a sound source switching circuit 403. The output of the sound source switching circuit 403 is connected to the amplifier 404. Amplifier 404
Is connected to the first SP 416 via the attenuator ATT405. The output of the attenuator ATT 405 is further connected to the second SP 417 via the phase inversion circuit 412 and the attenuator ATT 413. Further, they are connected to the third SP 418 and the fourth SP 419 via the filter 414 and the attenuator ATT415.

The control input 420 is connected to the sound source switching circuit 403 and the control unit.
Connect to 410. The output of the control unit 410 is supplied to the phase inversion circuit 412.
, An attenuator ATT413, a filter 414, and an attenuator AT
T415, the information terminal I / F 426, and the CPU 409 are connected. The output of the camera 406 is amplified by the video amplifier circuit 407, and A
The data is stored in the memory 411 via the / D converter 408 and the CPU 409. Depending on the purpose, the attenuator ATT405, 41
3, 415 may be a fixed attenuator instead of a variable attenuator controlled by a control signal from the control unit 410.

Further, as a connection for controlling the phase to the left and right, the speaker group for performing the phase control is operated by being divided into two systems. That is, the phase inversion 421 is connected to the second SP 424 via the ATT 422, and the A
The connection is made from the phase inversion 421 via the TT423. Other configurations are the same as those of the first embodiment.

The operation of the speaker device according to the second embodiment of the present invention configured as described above will be described. At first,
A method of controlling the phase of the speaker group will be described with reference to the control circuit diagram of FIG. The signal from the sound source is amplified to a required amount by an amplifying device 404 and supplied to each speaker. The output signal of the amplifying device 404 is directly input to the 1st SP 416 located at the center of the speaker housing.

A control unit for controlling the directivity of the speaker includes an information terminal I / F 426 for connecting to various information terminals.
There is. When no one is operating the information terminal, the general information service is provided with wide directivity. When the information terminal is operated and an input signal is input to the information terminal, the directivity is narrowly controlled to provide a service to an operator or a customer.

When it is determined that one person has arrived in front of the information terminal, the phase inversion circuit 412 sends 1
An audio signal having a phase different from the phase of the sound input to stSP is input. That is, an acoustic signal having a phase changed while controlling the opposite phase or directivity is input. At the same time, 1 for 3rdSP418 and 4thSP419
A signal which has the same phase as stSP but whose attenuation is controlled by ATT415 is applied. Control the spread of the sound by the amount of attenuation,
The direction of the sound is controlled by the phase control by the 2nd SP.

When it is necessary to correct the frequency characteristics in terms of audibility, the filter 414 uses the 3rd SP 418 and the 4th SP 419.
Adjust the frequency characteristics of the signal input to the. By correcting the frequency characteristics on the audibility, the audibility can be corrected in the case of narrow directivity. The method of setting the maximum sound pressure point to the same level in both the wide directivity and the narrow directivity is the same as in the first embodiment.

Next, a method of controlling a speaker by providing a speaker to an information terminal or a POS terminal and recognizing a user of the information terminal with a camera will be described. When no one accesses the information terminal device, that is, when there is no image of a person in the camera or when the person passes without stopping, information and music can be transmitted to a wide range of people around the information terminal device. The purpose of this is to broaden the service range as broad directivity.

On the other hand, when a person who searches for information comes in front of the information equipment, the face of the individual is imaged with a camera. Camera 406
Is digitized by the A / D 408. The CPU 409 compares the information with the information in the memory 411 to detect that the individual operates the information terminal and performs an operation to obtain the information. In order to define a service area for only the operator of the information terminal, the speaker has narrow directivity. A plurality of personalized music prepared for the information terminal, operation instructions of the information terminal, and the like are selected and provided according to the result of recognizing a man, a woman, a young person, and an elderly person from the image. By making the speaker have a narrow directivity, the operation of the information terminal can be guided while being isolated from the ambient noise, and the service can be provided only to the operator.

When operating an information terminal, the person who operates the information terminal is not always located directly in front of the information terminal. From the camera image,
It detects that the operator has shifted left and right, and changes the directivity of the speaker according to the shift. 2nd SP417, 2n
The ATTs 422 and 423 are controlled based on the person position information of the image, and the input level to the speakers is changed so that the sound of the information terminal is accurately transmitted.

Further, by providing the camera 406 with an iris recognizing function, the iris of a person coming to the information terminal can be read, and if the iris is already registered, specific information of the person can be provided. Can be. For example, if the information terminal is connected to a bank terminal, personal account information can be provided. If you enter the station name, you can provide home return route information to your home. Alternatively, it is also possible to sequentially display information desired by the individual.

As described above, according to the second embodiment of the present invention, the speaker device recognizes the situation of the person who operates the information terminal device, and appropriately sets the sound spread and directivity according to the situation. Therefore, appropriate audio information is provided, so that appropriate information can be provided to the operator of the information terminal device without being disturbed by ambient noise.

[0062]

As is apparent from the above description, according to the present invention, the speaker device comprises a speaker housing, a plurality of speakers arranged in one or more rows inside the speaker housing, and each speaker is driven. Means for changing the audible area of the speaker by changing the sound signal to be emitted, thereby changing the audible area of the speaker, so that the directivity of the speaker can be easily controlled to change the audible direction and range. The effect is obtained.

Further, a center speaker group arranged at the center of the speaker housing, a center outer speaker group arranged between the center and the periphery of the speaker housing, and a center speaker group arranged at the periphery of the speaker housing. The means to change the audible area of the speakers by changing the directivity by changing the amplitude and phase of the acoustic signal that drives each speaker group of the outer speaker group that was set, so that the direction and range in which the sound of the speakers can be heard The effect that it can be easily changed is obtained.

Further, since means for optimizing the audible area of the speakers by changing the phase of the acoustic signal for driving the center outside speaker group is provided, the sound audible range can be increased by controlling only one speaker group. The effect of being able to optimize is obtained.

Also, a camera installed in the speaker housing, means for analyzing the image of the camera, and means for switching the speaker between wide directivity and narrow directivity according to the analysis result are provided. The effect that the range in which the voice information reaches can be changed depending on whether or not there is a person.

In addition, there are provided means for analyzing the image of the camera to recognize that a person has stopped in front of the speaker housing, and means for switching the speaker to narrow directivity according to the recognition result. The effect that audio information can be provided only to the previous person is obtained.

Further, there are provided means for analyzing a camera image and recognizing that a person has stopped in front of the speaker housing, and means for outputting music or announcement corresponding to the individual from the speaker according to the recognition result. Therefore, it is possible to provide an effect that audio information suitable for an individual can be provided.

Means for analyzing the image of the camera to recognize that a person is not stopped in front of the speaker housing;
Since the means for switching the speaker to the wide directivity according to the recognition result is provided, it is possible to obtain an effect that audio information can be provided to a large number of people around the speaker.

Means for analyzing the image of the camera to recognize that a person is not stopped in front of the speaker housing;
Since means for outputting music or announcements corresponding to multiple people from the speaker according to the recognition result is provided,
The effect is that advertisements and the like targeting a large number of people can be performed.

Further, there are provided means for analyzing a camera image to recognize a person's iris, means for specifying a person from iris data, and an information terminal for selecting and providing information on the specified person. Therefore, an effect is obtained that audio information can be provided to a specific individual.

Further, since means for analyzing the image of the camera and recognizing the position of the person and means for switching the speaker to narrow directivity for the position of the person according to the recognition result are provided, the position of the person changes. Thus, the effect that audio information can be provided is obtained.

Further, since means for controlling the sound pressure in front of the speaker to be constant regardless of the width of the directivity of the speaker is provided, it is possible to always provide audio information with a sound of a constant volume. can get.

In addition, since there are provided connecting means for connecting various information terminals, means for detecting that the connected information terminal has been operated, and means for switching the speaker to narrow directivity according to the detection result, The effect is obtained that audio information can be provided only to the operator of the information terminal.

Further, since the means for switching the speaker to the wide directivity when the operation of the information terminal is not detected is provided, the effect that voice information can be provided to people near the information terminal can be obtained. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an arrangement of speaker devices according to first and second embodiments of the present invention;

FIG. 2 is a diagram showing the directivity of the speaker device according to the first and second embodiments of the present invention;

FIG. 3 is a diagram of a control circuit of the speaker device according to the first embodiment of the present invention;

FIG. 4 is a diagram illustrating a control circuit of a speaker device according to a second embodiment of the present invention.

[Explanation of symbols]

 101 Speaker housing 102 SP1 103 SP2 104 SP3 105 SP4 106 1st SP 107 Camera 108 SP5 109 SP6 110 SP7 111 SP8 112 2nd SP 113 SP9 114 SP10 115 SP11 116 SP12 117 3rdSP 118 SP13 119 SP14 120 SP15 121 SP16 122 4thSP 201 Wide directivity 202 Narrow directivity 203 Speaker 204 Maximum sound pressure point 301 Sound source 1 302 Sound source 2 303 Sound source switching 304 Amplifying device 305 ATT 306 Control unit input 307 Control unit 308 Camera 309 Video amplification 310 A / D 311 CPU 312 ATT 313 ATT 314 ATT 315 1stSP 316 2ndSP 317 3rdSP 318 4thSP 319 Memory 320 Information terminal I / F 401 Sound source 1 402 Sound source 2 403 Sound source switching 404 Amplification device 405 ATT 406 Camera 407 Video amplification 408 A / D 409 CPU 410 Control unit 411 Memory 412 Phase inversion 413 ATT 414 Filter 415 ATT 416 1stSP 417 2ndSP 418 3rdSP 419 4t hSP 420 control input 421 phase inversion 422 ATT 423 ATT 424 2nd1SP 425 2nd2SP 426 Information terminal I / F

Claims (13)

[Claims] 1. A speaker housing, a plurality of speakers arranged in a row or a plurality of rows inside the speaker housing, and the directivity is controlled by changing an acoustic signal for driving each speaker. Means for changing the audible region of the speaker device. 2. A group of center speakers arranged at the center of the speaker housing, a center outside speaker group arranged between the center and the periphery of the speaker housing, and a periphery of the speaker housing. Means for changing the audible area of the speakers by changing the directivity by changing the amplitude and the phase of the audio signal for driving each of the speaker groups of the outer speaker group arranged in the section. The speaker device according to 1. 3. The speaker device according to claim 2, further comprising means for optimizing an audible area of the speaker by changing a phase of an acoustic signal for driving the center outside speaker group. 4. A camera provided in the speaker housing, means for analyzing an image of the camera, and means for switching the speaker between wide directivity and narrow directivity according to the analysis result. 3. The speaker device according to claim 1, wherein: 5. A system comprising: means for analyzing an image of the camera to recognize that a person has stopped in front of the speaker housing; and means for switching the speaker to narrow directivity according to a recognition result. The speaker device according to claim 4, wherein: 6. A means for analyzing the image of the camera to recognize that a person has stopped in front of the speaker housing, and a means for outputting music or an announcement corresponding to an individual from the speaker according to the recognition result. The speaker device according to claim 4, further comprising: 7. A means for analyzing an image of the camera to recognize that a person is not stopped in front of the speaker housing, and a means for switching the speaker to a wide directivity according to a recognition result. The speaker device according to claim 4, wherein: 8. A means for analyzing an image of the camera to recognize that a person is not stopped in front of the speaker housing, and playing music or an announcement corresponding to a plurality of persons from the speaker according to a recognition result. 5. The speaker device according to claim 4, further comprising means for outputting. 9. A means for analyzing an image of the camera to recognize an iris of a person, a means for specifying the person from the iris data, and an information terminal for selecting and providing information on the specified person. The speaker device according to claim 4, further comprising: 10. A system comprising: means for analyzing a camera image to recognize a position of a person; and means for switching the speaker to narrow directivity toward the position of the person according to a recognition result. The speaker device according to claim 4, wherein 11. A system according to claim 1, further comprising means for controlling the sound pressure in front of said speaker to be constant regardless of the directionality of said speaker.
The speaker device as described. 12. A connection means for connecting various information terminals,
3. The speaker device according to claim 1, further comprising means for detecting that the connected information terminal has been operated, and means for switching the speaker to narrow directivity in accordance with a result of the detection. 13. The speaker device according to claim 12, further comprising means for switching the speaker to a wide directivity when the operation of the information terminal is not detected.