JP2002044778A - Microphone, microphone adapter, display device, mixer, public address system and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a precise localization of an acoustic image and also achieve precise prevention of hauling. SOLUTION: In a public address system, a vocal microphone 10 converts the voice of a singer to an electric signal at a microphone unit 11 to output a voice signal S. An adapter 12 has a built-in angle sensor and an acceleration sensor, and then a microphone output data Dout is created through combining a signal showing a spatial state of the microphone 10 obtained from those sensors with the voice signal S. A display device 21 outputs sound data Ds to a mixer 22 achieving separation of voice sound data Ds from the data Dout; furthermore the device 21 acquires a position of the microphone 10 with double integration of acceleration information to display it on a screen and also displays the direction of the microphone 10 on the screen based on angle information. Therefore, a PA engineer can localize accurately the image operating the mixer 22 without grasping the microphone 10 and also can prevent hauling with certainty.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker system and a loudspeaker method suitable for preventing howling and for localizing a sound image, and a microphone suitable for them.
The present invention relates to a microphone adapter, a display device, and a mixer.

[0002]

2. Description of the Related Art In a loudspeaker system in a concert hall, a signal output from a vocal microphone or a signal output from a musical instrument microphone or the like is synthesized using a mixer, and the synthesized signal is amplified and output from a loudspeaker or monitor speaker. Sounding. Loudspeakers are arranged at the left and right ends of the boundary between the stage and the seats, facing the direction of the seats, and emit a loud sound so that the singer's voice or the sound of the instrument can be heard by the audience away from the stage. .

[0003] The singer is difficult to hear his voice due to the sound of the musical instrument or the sound emitted from the loudspeaker reflected off the wall of the hall and returned. The monitor speaker solves this problem. The monitor speaker is
It is provided on the stage, and is arranged facing the stage from the audience seat opposite to the loudspeaker. The singer's voice is emitted from the monitor speaker, so that the singer can confirm his or her singing at a high volume.

[0004] In such a loudspeaker system, the mixer is located in a passenger seat. The PA engineer operates the mixer to adjust the volume of the sound emitted from the loudspeaker or the monitor speaker. In an actual concert, a singer moves on stage with a vocal microphone, sings and speaks to the audience.
In this case, the PA engineer needs to adjust the mixer in accordance with the movement of the vocal microphone so that the howling is prevented and the sound image of the singer is localized.

A singer's voice is input from a vocal microphone, amplified, and then emitted from a monitor speaker. When the sound is picked up again by the vocal microphone, a feedback loop is formed and positive feedback is applied. Therefore,
At a frequency where the feedback gain exceeds “1”, the oscillation condition is satisfied, and howling occurs. For this reason, the PA engineer visually confirms the position of the vocal microphone, and manually adjusts the volume when the singer approaches the monitor speaker and decreases the volume when the singer moves away from the monitor speaker.

[0006] When the singer is singing in the center of the stage, the PA engineer adjusts the mixer so that the volumes of the singing sounds emitted from the left and right loudspeakers are equal, while the singer is on the right side of the stage. , The mixer is adjusted such that the volume of the singing voice emitted from the right loudspeaker is higher than the left volume. Thereby, the sound image of the singer can be localized.

That is, in the conventional loudspeaker system, the PA engineer visually checks the movement of the vocal microphone and operates the mixer in accordance with the position of the vocal microphone.
Howling was prevented and the sound image was localized.

[0008]

By the way, in order to accurately grasp the position of the vocal microphone, it is necessary to look over the entire stage. Therefore, in the conventional loudspeaker system, a mixer is arranged near the center rather than in front of the audience. It is desirable to do. However, such a place is a premium seat where the singer's figure can be seen at hand, and is extremely valuable as a seat. For this reason, the mixer is often placed off the center of the audience seats for the convenience of the operation of the concert, making it difficult for the PA engineer to accurately grasp the position of the vocal microphone.

Further, even if the mixer is arranged in the center of the seat, the position of the vocal microphone is visually recognized by the PA engineer, so that the illumination of the stage is turned off or an effect by smoke is performed. In some cases, it was difficult to accurately grasp the position of the vocal microphone.

[0010] Furthermore, howling occurs when the vocal microphone picks up the sound of the monitor speaker as described above, so that not only the relative positional relationship between the vocal microphone and the monitor speaker, but also the orientation of the vocal microphone becomes a problem. . For example, when the singer is singing toward the audience, the vocal microphone mainly receives the singer's voice, but when the singer is singing with the back facing the audience, the vocal microphone and the monitor speaker face each other. Therefore, howling is likely to occur. However, it was difficult for a PA engineer located away from the stage to accurately grasp the direction of the vocal microphone.

[0011] In addition, when a plurality of singers sing while dancing on the stage, the PA engineer grasps the position of each vocal microphone, prevents howling, and localizes the sound image. , But it requires a high degree of skill, and there is a limit to manual operation.

The present invention has been made in view of the above circumstances, and has a microphone and a microphone adapter capable of outputting, in addition to audio information, additional information indicating its spatial state, a microphone based on the additional information. It is an object of the present invention to provide a display device for displaying the position of a sound source, a mixer capable of automatically adjusting the volume based on the additional information, a loudspeaker system using the same, and the like.

[0013]

According to a first aspect of the present invention, there is provided a microphone having a conversion unit for converting sound into an electric signal and outputting sound information, wherein the acceleration of the microphone is detected. A microphone that includes an acceleration detection unit that generates acceleration information by combining the sound information and the acceleration information. The invention according to claim 2 is a microphone having a conversion unit that converts sound into an electric signal and outputs sound information, a direction information detection unit that detects a direction of the microphone and outputs direction information,
A microphone is provided, comprising: a synthesizing unit that synthesizes the sound information and the direction information and outputs the synthesized information. According to a third aspect of the present invention, there is provided a microphone having a conversion unit that converts sound into an electric signal and outputs sound information, wherein an acceleration detection unit that detects acceleration of the microphone and generates acceleration information, and a direction of the microphone A microphone comprising: a direction information detecting unit that detects direction and outputs direction information; and a combining unit that combines and outputs the sound information, the acceleration information, and the direction information. The invention according to claim 4 is characterized in that the orientation information detection unit is configured by an angle detection unit that detects the attitude angle and the azimuth angle of the microphone and outputs the attitude angle information and the azimuth angle information. A microphone according to claim 2 or 3 is provided. The invention according to claim 5, wherein the synthesizing unit generates data conforming to a digital audio format including audio data and user data in a subframe, and converts the sound information into audio data in the subframe. The microphone according to claim 3, wherein the acceleration information and the orientation information are allocated to the user data bits while being allocated to bits.

According to a sixth aspect of the present invention, there is provided a microphone adapter used together with a microphone for converting sound into an electric signal and outputting sound information, wherein an input connector for connecting the microphone to a main body, and additional information. A microphone adapter comprising: an additional information generating unit that generates the information; and a synthesizing unit that generates the output information by synthesizing the sound information supplied through the input connector and the generated additional information. I will provide a. Claim 7
The invention according to claim 6, further comprising: an output connector for connecting a connection cable to the main body, wherein the output information is output via the output connector. I do. According to an eighth aspect of the present invention, there is provided the microphone adapter according to the sixth aspect, further comprising a transmission unit for modulating and transmitting output information. The invention according to claim 9 provides the microphone adapter according to claim 6, wherein the additional information is information indicating a spatial state of the main body. The invention according to claim 10 provides the microphone adapter according to claim 6, wherein the additional information generation unit has an acceleration sensor and generates acceleration information indicating an acceleration of the main body as the additional information. I do. The invention according to claim 11 provides the microphone adapter according to claim 6, wherein the additional information generation unit has an angle sensor and generates angle information indicating a direction of the main body as the additional information. I do.

A twelfth aspect of the present invention is a display device for displaying the state of the microphone based on microphone output information obtained by synthesizing additional information indicating the spatial state of the microphone and audio information, Provided is a display device, comprising: a separation unit that separates the additional information from microphone output information; and a display unit that displays a spatial state of the microphone based on the separated additional information. The invention according to claim 13, wherein the additional information includes acceleration information indicating an acceleration of the microphone, the separation unit separates the acceleration information from the microphone output information, and the display unit includes the acceleration information. A position information generation unit that generates position information indicating a current position of the microphone based on movement information obtained by performing double integration of information and initial position information of the microphone that is input in advance; 13. The display device according to claim 12, wherein the position of the microphone is displayed based on the display. The invention according to claim 14, wherein the additional information has acceleration information indicating an acceleration of the microphone and direction information indicating a direction of the microphone, and the separation unit determines the acceleration information from the microphone output information. And the orientation information, respectively, the display unit, based on the movement information obtained by double integration of the acceleration information and the initial position information of the microphone previously input,
A position information generating unit that generates position information indicating a current position of the microphone, wherein the position of the microphone is displayed based on the position information and the direction of the microphone is displayed based on the direction information. A display device according to claim 12 is provided.

According to a fifteenth aspect of the present invention, a mixer for adjusting a level of an output signal supplied to a plurality of speakers based on microphone output information in which additional information indicating a spatial state of a microphone and audio information are synthesized. A separation unit that separates the additional information and the audio information from the microphone output information, a control signal generation unit that generates a control signal based on the separated additional information, and a control unit that generates a control signal based on the generated control signal. And an adjusting unit for adjusting the level of the separated audio information to generate each of the output signals. The invention according to claim 16, wherein the additional information has acceleration information indicating acceleration of the microphone, and the separation unit separates the acceleration information and the audio information from the microphone output information, The control signal generation unit generates position information indicating a current position of the microphone based on movement information obtained by double integrating the acceleration information and initial position information of the microphone input in advance. The mixer according to claim 15, further comprising a generation unit, wherein the control signal is generated to localize a sound image of the microphone based on the position information. The invention according to claim 17, wherein the additional information has acceleration information indicating acceleration of the microphone, and the separation unit separates the acceleration information and the audio information from the microphone output information, A control signal generation unit configured to generate position information indicating a current position of the microphone based on movement information obtained by double integrating the acceleration information and initial position information of the microphone input in advance. And calculating a distance between the microphone and the monitor speaker based on the position information and the pre-input position information of the monitor speaker, and generating the control signal according to the calculated distance. A mixer according to claim 15, characterized in that: The invention according to claim 18, wherein the additional information has acceleration information indicating acceleration of the microphone and direction information indicating a direction of the microphone, and the separation unit determines the acceleration information from the microphone output information. The control information generator separates the direction information and the audio information, and the control signal generation unit performs the microphone based on the movement information obtained by double integrating the acceleration information and the initial position information of the microphone input in advance. And a distance between the microphone and the monitor speaker based on the position information and the previously input position information of the monitor speaker, and a reference connecting the both. Identify the axis,
The mixer according to claim 15, wherein an angle between a central axis of the microphone specified by the orientation information and the reference axis is calculated, and the control signal is generated based on the calculated distance and angle. I will provide a.

According to a nineteenth aspect of the present invention, there are provided a plurality of speakers for loudspeakers arranged toward a customer seat, and a monitor speaker arranged on a stage for allowing a singer to listen to his or her own singing voice. In the loudspeaker system which amplifies the sound and emits the sound from the loudspeaker and the monitor speaker, the singer's wireless microphone and the position information indicating the position of the wireless microphone by measuring the intensity of the radio wave transmitted from the wireless microphone , A display device that displays the position of the wireless microphone in a stage image based on the generated position information, and receives radio waves transmitted from the wireless microphone to reproduce audio information. Receiver and amplify the reproduced audio information Providing a loudspeaker system, characterized in that a mixer for adjusting the level of the serial loud speaker and an output signal to be output to the monitor speaker.
The invention according to claim 20, wherein the wireless microphone converts a sound into an electric signal and outputs sound information, a direction information detecting unit that detects a direction of the microphone and outputs direction information, A transmitting unit that transmits a frequency-multiplexed signal by modulating each of the voice information and the direction information with a different carrier frequency, the receiver includes:
A separating unit that separates the frequency of the received signal, and a demodulating unit that demodulates each of the separated signals to reproduce the audio information and the position information, wherein the display device is configured based on the generated position information. The position of the wireless microphone is displayed in the stage image, the position of the monitor speaker is displayed in the stage image based on the position information of the monitor speaker stored in advance, and the wireless microphone is displayed based on the reproduced direction information. 20. The method of claim 19, further comprising displaying an orientation of the microphone.
The loudspeaker system according to the above is provided.

According to a twenty-first aspect of the present invention, in the loudspeaker method for amplifying audio information and emitting the sound from a plurality of speakers, the microphone converts the audio information into an electric signal and the spatial information of the microphone. The additional information obtained by detecting the state is synthesized and output as microphone output information, the audio information and the additional information are separated from the microphone output information, and based on the separated additional information, There is provided a loudspeaker method characterized by adjusting the level of audio information and generating each output signal to be output to the plurality of speakers.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <1. First Embodiment> A loudspeaker system according to a first embodiment of the present invention will be described below with reference to the drawings. <1-1: Overview of the Loudspeaking System> FIG. 1 shows a first embodiment of the present invention.
FIG. 1 is a plan view illustrating an example of a concert hall to which a sound enhancement system according to an embodiment is applied. FIG. 2 is a block diagram showing an electrical configuration of the loudspeaker system. As shown in FIG. 1, a loudspeaker system A includes a vocal microphone 10, a left channel loudspeaker SPL, a right channel loudspeaker SPR, and first to third monitor speakers SPM1 to SPM1 to SPM.
It is provided with a PM3 and an adjustment console 20. The vocal microphone 10 and the adjustment console 20 are connected by a connection cable (not shown), and the adjustment console 20 and each speaker are connected via a connection cable and an amplifier (not shown). Note that a plurality of instrument microphones are arranged on the stage in addition to the vocal microphone 10, and other vocal microphones are arranged as necessary. Then, the signals output from those microphones are supplied to the control console 20,
The signal is synthesized with a signal from the vocal microphone 10 and output to each speaker.

Left and right channel loudspeakers SPR, S
The PLs are arranged at the left and right ends in front of the stage, facing the seats, while the first to third monitor speakers SPM1 to SPM3 are arranged.
Are placed facing the back of the stage more than in front of the stage. And left and right channel loudspeakers SPR, S
From the PL, the singer's voice and performance sound are emitted at a high volume so that the audience behind the audience can hear it.
The singer's voice is emitted at a predetermined level from the first to third monitor speakers SPM1 to SPM3.

The vocal microphone 10 has a microphone unit 11 and an adapter 12 as shown in FIG. The microphone unit 11 converts the voice of the singer into an electric signal and outputs it as a voice signal S. Although the details of the adapter 12 will be described later, the adapter 12 includes an acceleration sensor for detecting the acceleration of the vocal microphone 10 and an angle sensor for detecting the direction (posture or direction) of the vocal microphone 10. The obtained acceleration data and microphone angle data are time-division multiplexed with audio data to generate microphone output data Dout.

Further, the adjusting console 20 includes a display device 21 and a mixer 22, as shown in FIG. Display device 21
Separates the audio data Ds from the microphone output data Dout and outputs it to the mixer 22, while monitoring the position and orientation of the vocal microphone 10 on the stage based on the acceleration data and the microphone angle data separated from the microphone output data Dout ( (Not shown).

According to the above loudspeaker system A, the PA engineer looks at the display device 21 and
Location and its direction,
Adjusting the mixer 22 to prevent howling,
It is possible to accurately localize the vocal sound image.
In addition, the PA engineer has a vocal microphone 1 on the stage.
Since there is no need to see the position of 0 directly to know its position,
As shown in FIG. 1, the adjusting table 20 can be arranged at a position where the singer's figure is difficult to see, such as the back right corner of the audience seat, and there is an advantage that a place with a high value as the audience seat can be provided to the audience.

<1-2: Vocal Microphone> Next, the vocal microphone 10 will be described. In a concert or the like, a singer often selects and uses a microphone that suits his or her taste. The singer's voice quality, for example,
There is a personality such as "the bass has tension" or "the treble has extension". The singer will select a microphone that can express his or her personality in order to attract the audience by singing.

An important factor in making this choice is:
There are frequency characteristics and distortion characteristics of the microphone. For example,
A singer who has tension in the bass often selects a microphone that has excellent bass frequency characteristics and has a low frequency and a small distortion factor. On the other hand, a singer whose treble has an extension usually selects a microphone whose frequency characteristic extends to the treble. Therefore, professional singers often have their own microphone.

However, for example, the microphone as required in the present embodiment needs a function of adding voice information obtained by converting the voice of the singer to an electric signal and adding other information. For this purpose, a method of providing a dedicated microphone to the singer is conceivable. However, if this method is adopted, a problem arises in that the singer cannot use his / her own microphone that he has been accustomed to.

Therefore, in this embodiment, an acceleration sensor for detecting the acceleration of the vocal microphone 10 and an angle sensor for detecting the direction of the vocal microphone 10 are provided in the adapter 12, and the acceleration data and microphone angle data obtained by these are provided. A configuration in which the microphone output data Dout is generated by time-division multiplexing with audio data, so that a professional singer who wants to use a familiar microphone as it is and a PA that wants to accurately grasp the position and direction of the microphone. It satisfies both engineer requirements. Hereinafter, the vocal microphone will be described in detail.

FIG. 3 is a perspective view showing an overview of the vocal microphone. As shown in this figure, a vocal microphone 10 includes a microphone unit 11 having a female connector 11a, and a male connector 12a having input terminals and a female connector 12b having output terminals.
And an adapter 12 which is connected to a connection cable having a male connection connector 13a. As the connection connector, a so-called cannon connector used for connection between audio devices can be used.

The reason that the vocal microphone 10 can be separated into the microphone unit 11 and the adapter 12 is firstly to enable the use of the existing microphone unit 11. That is, the conventional microphone unit 11 is directly connected to the connection cable 13 without the intervention of the adapter 12, but the use of the adapter 12 allows these resources to be effectively used. Second, the microphone unit 11 according to the singer's preference can be used. That is,
As described above, the voice quality of a singer has individuality such as "the bass has tension" or "the treble has extension". The singer often wants to attract the audience by singing using the microphone unit 11 that can sufficiently bring out such individuality. Therefore, it is necessary to be able to use a favorite microphone unit 11. For this purpose, a new function is added by the adapter 12, so that the microphone unit 11 can be replaced and used.

Next, the electrical configuration of the adapter 12 will be described. FIG. 4 is a block diagram illustrating a configuration of the adapter 12. As shown in FIG.
2, acceleration sensor 125, digital audio format converter 129, A / D converters 121, 123, 12
4, 126-128 and connectors 12a, 12
b.

First, the angle sensor 122 detects the attitude angle θ1 of the vocal microphone 10 and outputs an attitude angle signal A1, and also detects the azimuth angle θ2 of the vocal microphone 10 and outputs an azimuth angle signal A2. Here, the attitude angle θ1 and the azimuth angle θ2 will be described with reference to FIG. In the figure, the plane including the X axis and the Y axis is the plane of the stage shown in FIG. The X axis is parallel to the longitudinal direction of the stage,
The Y axis is parallel to the short direction of the stage, and the Z axis is an axis perpendicular to the stage. Also, the center axis C
Penetrates the center of the vocal microphone 10. Then, the intersection between the central axis C and the XY plane is set as the origin of the XYZ axes. In this case, the attitude angle θ1 is the angle of the center axis C with respect to the XY plane, while the azimuth angle θ1 is the angle between the straight line C ′ that maps the center axis C on the XY plane and the Y axis. The attitude angle signal A1 and the azimuth signal A2 output from the angle sensor 122 are converted from analog signals into digital signals by A / D converters 123 and 124, and are converted into digital signals as attitude angle data Da1 and azimuth angle data Da2. The data is supplied to the audio format conversion unit 129.

Next, the acceleration sensor 125 detects the acceleration in each of the X, Y, and Z directions shown in FIG. 5 and outputs it as an X-axis acceleration signal Bx, a Y-axis acceleration signal By, and a Z-axis acceleration signal Bz. Has become. Each of the acceleration signals Bx, By, and Bz is output from an A / D converter 126, 127,
The digital audio format converter 129 supplies X-axis acceleration data Dbx, Y-axis acceleration data Dby, and Z-axis acceleration data Dbz via 128.

Next, the digital audio format converter 129 multiplexes the audio data Ds obtained via the A / D converter 121 and the additional data Dadd to multiplex the AES
/ EBU Generates microphone output data Dout conforming to the digital audio format. Here, the additional data Dadd includes the attitude angle data Da1, the azimuth angle data Da2,
It is composed of X-axis acceleration data Dbx, Y-axis acceleration data Dby, and Z-axis acceleration data Dbz.

FIG. 6 is a diagram showing a subframe format of the microphone output data Dout. The microphone output data Dout is configured using a plurality of subframes shown in FIG. The bit (the 29th bit) of the user data in the subframe is a bit that can be freely used by the user. In this example, additional information such as the direction and acceleration of the microphone is transmitted by inserting additional data Dadd as user data. For example, each of the attitude angle data Da1 and the azimuth angle data Da2 is 5 bits, and each of the acceleration data Dbx, Dby, Db
If z is composed of 8 bits each, one additional data Dadd is transmitted in 34 subframes.

As described above, the vocal microphone 10 is provided with the adapter 12 for time-division multiplexing of the additional data Dadd to the audio data Ds, so that information such as the angle and acceleration of the microphone can be output.
Can be freely exchanged, so that the singer can use his favorite microphone unit 11.

<1-3: Display Device> Next, the display device 21
For example, a personal computer can be used. FIG. 7 is a block diagram of the display device 21 configured using a personal computer. As shown in this figure, the display device 21 is provided with a CPU 2 for controlling the entire device.
11 and a hard disk 21 functioning as storage means
2, a ROM 213, a RAM 214, a mouse 215 and a keyboard 216 functioning as input means, and a monitor 217 for displaying the position and orientation of the microphone, and data transfer between the vocal microphone 11 and the mixer 12. And an interface 218 for performing

Here, the hard disk 212 stores in advance basic data Dc relating to various concert halls in addition to application programs used for displaying microphones, and programs and data are read out as necessary. I have. The basic data Dc includes information on the structure of the hall, such as the dimensions of the stage and the seats. The ROM 213 stores a boot program for starting the computer system.
It is read at startup. Also, RAM
214 functions as a work area of the CPU 211, and stores application programs and the like read from the hard disk 212.

In such a configuration, the CPU 211 controls each component to cause the monitor 217 to display a predetermined image. FIG. 8 is a functional block diagram for explaining functions of the CPU 211 in the display device 21. First, when the microphone output data Dout is supplied from the vocal microphone 10, the separation unit 30 separates the audio data Ds from the microphone output data Dout and outputs it to the mixer 22,
User data is separated from a plurality of subframes to generate additional data Dadd. The acceleration data Dbx, Dby, and Dbz of the additional data Dadd are the microphone position detector 3
1, while the attitude angle data Da1 and the azimuth angle data Da2 are output to the display control unit 32. The microphone position calculator 31 calculates acceleration data Dbx, Dby, Dbz
Are respectively double integrated to calculate a microphone position, and this is output to the display control unit 32 as microphone position data Dm. The display controller 32 controls the monitor 2 to display an image indicating the microphone position on the stage based on the microphone position data Dm.
17 and the monitor 217 so as to display an image indicating the microphone angle.

FIG. 9 is a flowchart showing the operation of the display device 21. First, the PA engineer operates the keyboard 216 to activate the application program. Then, a plurality of concert hall names are displayed on the monitor 217 as icons. If the target hole is in the hole, the corresponding icon is selected. If not, the input screen of the basic data Dc is read and the input is performed (S1). At this time, the positions of the loudspeakers SPL and SPR,
The positions of the monitor speakers SPM1, SPM2, and SPM3 are also input.

Thereafter, the PA engineer inputs the microphone initial data Dmr indicating the initial position of the vocal microphone to the mouse 2.
15 or the keyboard 216 (S2). For example, at the start of the concert, vocal microphone 1
If 0 is placed on the microphone stand on the stage, the XYZ coordinates of the vocal microphone 10 attached to the microphone stand are input. More specifically, XYZ coordinates can be input from the input screen shown in FIG. On this input screen, a window W1 indicating the plane of the stage on which various speakers are arranged is displayed.
The PA engineer can freely change the position of the icon G by operating the mouse 215 to place the pointer P on the icon G indicating the vocal microphone 10 and performing a drag and drop operation. Then, as the icon G moves, the X and Y coordinate values in the window W2 surrounded by the dotted line displayed at the upper right of the screen change. Therefore, the X and Y coordinates of the vocal microphone 10 can be input by moving the icon G. Also, Z
The coordinates are “Z = m” in window W2 surrounded by a dotted line.
Is moved to the area where is displayed, the mouse 215 is clicked to activate the input, and then the keyboard 216 is operated to input. Note that the XY coordinates may be input directly into the window. The microphone initial data Dmr thus input is stored in the RAM 214
And becomes an initial value when calculating the microphone position data Dmr.

When the concert starts, the PA engineer operates the keyboard 216 to input a start instruction (S3). When the CPU 211 detects this start instruction, the CPU 211 calculates the acceleration data Dbx, Dby, Dbz and the posture angle data Da from the microphone output data Dout.
1 and the azimuth data Da2 (S4). Further, the CPU 211 stores the acceleration data Dbx, Dby, Db
The microphone position data Dm is generated based on and the microphone initial data Dmr (S5). Here, if the XYZ components of Dm are represented by (Xm, Ym, Zm) and the XYZ components of Dmr are represented by (X0, Y0, Z0), the microphone position data Dm is given by the following equation. Xm = ∫∫
Dbx + X0, Ym = ∫∫Dby + Y0, Xz = ∫∫Db
The z + Z0 CPU 211 calculates the above equation to generate microphone position data Dm.

Thereafter, the CPU 211 sets the microphone position data Dm, the attitude angle data Da1, and the azimuth angle data Da.
2 to monitor 21 the position and orientation of the microphone.
7 (S6). FIG. 11 is a diagram illustrating an example of a screen of the monitor 217 that displays the position and orientation of the microphone. On this display screen, the icon G indicating the position of the vocal microphone 10 is displayed in the window W1 with the microphone position data Dm.
On the other hand, the window W2 displays the XYZ coordinate values of the vocal microphone 10 based on the microphone position data Dm. Therefore, when the singer moves on the stage with the vocal microphone 10, the position of the icon G in the window W1 changes and the XYZ coordinate values in the window W2 change accordingly.

The window W3 contains the attitude angle data Da.
1, the value of the attitude angle θ1 is displayed while the attitude of the microphone is displayed. Further, based on the azimuth data Da2, the window W4 displays the azimuth of the microphone and the value of the azimuth θ2. Therefore, when the singer sings while changing the direction of the vocal microphone 10, the attitude and orientation of the microphone, which changes every moment, are monitored.
17 will be displayed.

As described above, the position and orientation of the vocal microphone 10 are displayed on the monitor 217 of the display device 21.
Can be accurately grasped on the display screen of the monitor 217 in the immediate vicinity without directly observing.

<1-4: Mixer> Next, the mixer 22 will be described. FIG. 12 is a block diagram of the mixer 22. As shown in this figure, the mixer 22 includes an input unit U
1, U2,..., Bus line B provided for each output system
L1 to BL5 and output amplifiers 223a to 223e for adjusting output levels (master levels) are provided.

The input unit U1 receives the audio data D
a D / A converter 221 for converting s from a digital signal to an analog signal and outputting an audio signal S, and input amplifiers 222a to 222 for adjusting an input level (send level)
2e. The other input units U2, U
, Are configured in the same manner as the input unit U1,
Data from other vocal microphones and instrument microphones is supplied. Also, the input amplifiers 223a to 223a
23e and the output amplifiers 223a to 223e each have a slider-type variable resistor VR, and the PA engineer operates the knob of the variable resistor VR to
These amplifier gains can be changed.

In such a configuration, the output signals of the input units U1, U2,.
5, the signals supplied to the same line are combined. Further, the synthesized signal is output from the output amplifier 223a.
223e and supplied to each speaker.

For example, assume that the screen shown in FIG. 13 is displayed on the monitor 217. PA engineer, Wind W1
It can be seen at a glance that the vocal microphone 10 is close to the monitor speaker SPM2, the microphone is slightly downward from the window W3, and the microphone orientation is facing the monitor speaker SPM2 from the window W4. In such a case where the relative positional relationship between the vocal microphone 10 and the monitor speaker SPM2 is such, the vocal microphone 10 can easily pick up the sound from the monitor speaker SPM2.
Howling easily occurs. So the PA engineer
The variable resistor VR of the output amplifier 222d is operated so as to lower the output level of the output amplifier 222d. Then
The volume emitted from the monitor speaker SPM2 will decrease. Thereby, howling can be prevented.

For example, the vocal microphone 10 at the center of the stage moves to the right side of the stage,
It is assumed that the screen shown in FIG. 14 is displayed in FIG. in this case,
PA engineer starts vocal microphone 1 from window W1
Recognizing the movement of 0, to localize the sound image of the singer,
The mixer 22 will be adjusted. Specifically, the variable resistor VR of each amplifier is operated so as to attenuate the output level of the input amplifier 222e and increase the output level of the input amplifier 222d in accordance with the movement of the icon G. Thereby, the volume of the left channel loudspeaker SPL is attenuated, while the right channel loudspeaker SPL is attenuated.
Since the volume of PR can be increased, the singer's sound image can be moved to the right.

As described above, according to the present embodiment, the angle sensor 122 and the acceleration sensor 125 are incorporated in the adapter 12 of the vocal microphone 10, and the detected direction information (Da
1, Da2) and acceleration information (Dbx, Dby, Db)
z) and the audio information (Ds) are multiplexed and transmitted, and the display device 21 generates the position information of the microphone based on the acceleration information, and the position and the direction of the vocal microphone 10 based on the position information and the direction information. Was displayed. For this reason, the PA engineer decided to use the vocal microphone 10 on the stage.
Can be accurately grasped on the screen of the monitor 217 without visually observing. Therefore, adjustment table 2
Since there is no need to place the “0” in a place overlooking the stage, it is possible to increase the number of seats where the singer can be clearly seen. Further, even when it is impossible to see the vocal microphone 10 due to the stage lighting being dark or the effect of smoke or the like, the position and the direction can be accurately grasped on the monitor screen. As a result, accurate information can be provided to the PA engineer, and the mixer operation for preventing howling and localizing the sound image can be facilitated.

<2. Second Embodiment> Hereinafter, a second embodiment of the present invention will be described.
A sound enhancement system according to an embodiment will be described with reference to the drawings. <2-1: Configuration of a loudspeaker system> FIG. 15 is a block diagram showing an electrical configuration of a loudspeaker system according to a second embodiment of the present invention. Loudspeaker system B according to second embodiment
2 except that a control device 21 ′ is used instead of the display device 21 and a mixer 22 ′ is used instead of the mixer 22 in the first embodiment shown in FIG.
Is the same as That is, the vocal microphone 10 is
The same components as those described in the embodiment are used.

The control device 21 'controls the send level and the master level of the mixer 22' based on the additional data Dadd included in the microphone output data Dout supplied from the vocal microphone 10. In other words, in the first embodiment, the PA engineer operates the display device 2
In contrast to the manual operation of the variable resistor VR of the mixer 22 while looking at the screen displayed in 1, the loudspeaker system B of the second embodiment performs control based on information on the position and orientation of the vocal microphone 10. The device 21 'controls the mixer 22' automatically.

A personal computer can be used as the control device 21 'of this example, and the specific configuration is the same as that of the display device 21 of the first embodiment shown in FIG. However, the functions of the application programs executed on the personal computer are different. FIG. 16 is a functional block diagram for explaining functions of the CPU 211 in the control device 21 ′. Since the separation unit 30 and the microphone position calculation unit 31 are the same as those in the first embodiment (see FIG. 8), the description thereof is omitted, and the send level adjustment unit 33 and the master level adjustment unit 34 will be described. The send level adjuster 33, based on the microphone position data Dm supplied from the microphone position calculator 31, performs a left channel loudspeaker SPL and a right channel loudspeaker S
It generates send level control signals Cs1 and Cs2 for controlling the send level corresponding to PR and outputs them to mixer 22 '. The send level control signals Cs1 and Cs2 are used for sound image localization. On the other hand, based on the microphone position data Dm, the attitude angle data Da1, and the azimuth angle data Da2, the master level adjusting unit 34 controls the master level control signals Cm1 to Cm1 for controlling the master levels corresponding to the monitor speakers SPM1 to SPM3. Cm3 is generated and output to the mixer 22 '. Master level control signal C
m1 to Cm3 are used to prevent howling.

Next, FIG. 17 shows the main configuration of the mixer 22 '.
This will be described with reference to FIG. As shown in the figure, the basic configuration of the mixer 22 'is the same as the mixer 2 of the first embodiment shown in FIG.
2 and the input amplifiers 222a 'to 222e'.
The difference is that the gains of the output amplifiers 223a 'to 223e' are controlled based on the send level control signal Cm and the master level control signal Cm. The send level control signals Cs1 and Cs2 are supplied to input amplifiers 222d ′ and 222e ′, while the master level control signals Cm1 to Cm3 are output amplifiers 223c ′ to 223c ′.
223e '.

Therefore, the send level control signal Cs
1. Based on Cs2, left channel loudspeaker S
The signal levels supplied to PL and the right channel loudspeaker SPR are automatically adjusted, while the monitor speakers S based on the master level control signals Cm1 to Cm3.
The signal levels supplied to PM1 to SPM3 are automatically adjusted.

<2-2: Operation of the loudspeaker system> Next, the operation of the loudspeaker system B will be described. <2-2-1: Sound Image Localization Processing> First, automatic adjustment of sound image localization will be described. FIG. 18 is a flowchart for explaining the automatic adjustment of the sound image localization. First, the PA engineer operates the keyboard 216 of the control device 21 ′ to input the basic data Dc and the reference position data Dr (S2).
1). At this time, the positions of the loudspeakers SPL, SPR and the positions of the monitor speakers SPM1, SPM2, SPM3 are also input. Here, the reference position data Dr is data indicating a reference position at which the sound image is localized. The reference position is usually selected near the center rather than in front of the audience. For example, in the example shown in FIG. 19, Pref is the reference position. Next, the processing from step S22 relating to the input of the microphone initial data Dmr to step S25 relating to the calculation of the microphone position data Dm is the same as the processing from step S2 to step S5 in the flowchart shown in FIG. 9 described in the first embodiment. Therefore, the description is omitted here.

When the microphone position data Dm is calculated in step S25, the CPU 211 connects the left channel loudspeaker SPL and the right channel loudspeaker SPR based on the microphone position data Dm and the reference position data Dr. The X coordinate of the intersection of the axis and the straight line connecting the vocal microphone 10 and the reference position Pref is calculated (S2).
6). This point will be specifically described with reference to FIG. As shown in the figure, the coordinates of the vocal microphone 10 indicated by the microphone position data Dm are (Xb, Yb),
Assuming that the coordinates of the reference position are (Xr, Yr), the X coordinate Xa of the intersection is given by the following equation. Xa = Xb + (Xr-Xb) Yb / (Yb-Yr) The CPU 211 calculates the X coordinate Xa by calculating the above equation.

Next, based on the X coordinate Xa, the CPU 211 generates send level control signals Cs1 and Cs2 with reference to the panning table TBLa (S27). The panning table TBLa stores the send level control data D
Cs1 and DCs2 are stored and read out from the hard disk 212 before starting this processing.
To be forwarded to. FIG. 20 shows an example of the stored contents of the panning table TBLa. The pan table TBLa in this example includes the send level control data DCs
1, DCs2 are stored, and the value of DCs1 decreases as the address n increases, while DCs2
Is to be increased. The values of DCs1 and DCs2 at a certain address n are DCs1 (n), DCs
2 (n), “K = DCs1 (n) ²
+ DCs2 (n) ² ”is fixed.
Assuming that the left channel volume at the reference position Pref is V1 and the right channel volume is V2, the singer's voice heard there can be represented by a vector Vz as shown in FIG. In this example, DCs1 is set so that K is fixed.
Since (n) and DCs2 (n) are selected, the volume can be kept constant at the reference position Pref even if the vocal microphone 10 moves.

In the process of step S27, the CPU 2
Reference numeral 11 denotes the position of the left-channel speaker SPL input in step S21 (origin in the example shown in FIG. 19).
And the distance L between them based on the positions of the right channel speaker SPR and n = N · Xa / L
To generate an address n. By performing the normalization processing in this manner, the panning table TB
La has versatility. Then, the send level control data DCs1 and DCs2 are read with reference to the panning table TBLa using the calculated address n, and further, these are transferred to the interface 218. Send level control data DCs1, DCs2
Are converted into analog signals at the interface 218 and supplied to the mixer 22 ′ as send level control signals Cs1 and Cs2.

Next, the send level control signals Cs1 and Cs2 input to the mixer 22 'are input to the input amplifiers 222d' and 222d ', respectively.
22e '. Input amplifier 222d ', 222
e ′ adjusts send levels corresponding to the left channel loudspeaker SPL and the right channel loudspeaker SPR in accordance with the send level control signals Cs1 and Cs2 (S28). Thereby, the left channel speaker S
The vocal level emitted from the PL and the vocal level emitted from the right channel speaker SPR are automatically adjusted. As a result, the sound image of the singer can be automatically localized following the movement of the vocal microphone 10 without the PA engineer operating the variable resistor VR of the mixer.

<2-2-2: Howling Prevention Processing> Next, automatic adjustment for preventing howling will be described. FIG. 21 is a flowchart for explaining automatic adjustment for preventing howling. In the howling prevention process, the processes from the input of the basic data Dc (S21) to the calculation of the microphone position data (S25) are performed as in the sound image localization process described above, but are omitted from the flowchart shown in FIG. It is.

When the microphone position data Dm is calculated in step S25, the CPU 211 determines the vocal microphone 10 based on the monitor speakers SPM1 to SPM3 based on the microphone position data Dm and the speaker position data.
Is calculated (S31). For example, FIG.
The vocal microphone 10 has coordinates (Xm, Ym,
Zm), and the monitor speaker SPM2 has coordinates (Xs, Y
s, Zs), the relative coordinates of the vocal microphone 10 with respect to the monitor speaker SPM2 are (Xm-Xs, Y
m-Ys, Zm-Zs).

Next, the CPU 211 calculates distances d1, d2, and d3 from the vocal microphone 10 to the monitor speakers SPM1 to SPM3 based on the microphone position data Dm and the speaker position data (S32). The calculated distances d1, d2, d3 are used as first index data Kd1, Kd2, Kd3 indicating the degree of howling in the RAM 21.
4 is stored. In the example shown in FIG. 22, the CPU 211 calculates the distance d2 according to the following equation. d2 = ｛(Xm−Xs) ² + (Ym−Ys) ² + (Zm−
Zs) ² ｝ ^1/2

Next, the CPU 211 sets the monitor speaker S
The relative angles of the vocal microphone 10 with respect to PM1 to SPM3 are calculated, and reference axes Q1 to Q3 connecting the monitor speakers SPM1 to SPM3 and the vocal microphone 10 are specified. In the example shown in FIG. 22, the reference axis Q2 is the monitor speaker SPM2.
Elevation angle θq1, which is the relative angle of the vocal microphone 10 with respect to
And the azimuth θq2. The CPU 211 calculates the elevation angle θq1 and the azimuth angle θq2 according to the following equations (S33). θq1 = tan ⁻¹ [(Zm−Zs) / {(Xm−Xs) ² + (Ym
−Ys) ² } ^1/2 ] θq2 = tan ⁻¹ {(Xm−Xs) / (Ym−Ys)}

Next, the CPU 211 controls the vocal microphone 1
0 and the attitude angle data Da1 and the azimuth angle data Da2 transmitted from each of the monitor speakers S in step S31.
Based on the elevation angle θq1 and azimuth θq2 calculated for each of PM1 to SPM3, the center axis M and the reference axis Q of the vocal microphone 10 are set.
The angles ψ1 to ψ3 between 1 and Q3 are calculated (S3
4). The calculated angles ψ1, ψ2, ψ3 are stored in the RAM 214 as second index data Kψ1, Kψ2, Kψ3 indicating the degree of howling. FIG. 22 shows an angle ψ2 between the central axis M and the reference axis Q2.

Thereafter, the CPU 211 outputs the first index data Kd1, Kd2, Kd3 and the second index data K {1, K}.
2, two-dimensional control table TBLb based on Kψ3
With reference to master level control data DCm1-DCm
m3 and read them through interface 2
18. Master level control data DCm
1, DCm2 and DCm3 are converted into analog signals at the interface 218 and supplied to the mixer 22 'as master level control signals Cm1, Cm2 and Cm3 (S35).

FIG. 23 is a conceptual diagram of the two-dimensional control table TBLb. As shown in this figure, the two-dimensional control table T
BLb has three sub-tables TBLb1 to TBLb3.
And each of the sub-tables TBLb1-TB
Lb3 stores the master level control data DCm1 to DCm3 in association with the first index data Kd1 to Kd3 and the second index data K # 1 to K # 3, respectively.
When reading the master level control data DCm1 from the sub-table TBLb1, the storage area is specified based on the first index data Kd1 and the second index data K # 1,
The corresponding master level control data D from the storage area
Read Cm1. Other sub-tables TBLb2, TB
The same applies to Lb3. The two-dimensional control table TBLb is created in advance and stored in the hard disk 212 based on the directional characteristics of the vocal microphone 10 and the sound emission characteristics of each of the monitor speakers SPM1 to SPM3. The data is read and transferred to the RAM 214.

As described above, based on the distances d1 to d3 from the vocal microphone 10 to the monitor speakers SPM1 to SPM3, and the angles ψ1 to ψ3 between the center axis M and the reference axes Q1 to Q3, the master level control data DCm1 to DCm3 are obtained. The reason for the generation is that howling occurs when the vocal microphone 10 picks up sounds from the monitor speakers SPM1 to SPM3, and the distance between the speakers and the microphone and the orientation of the microphone with respect to the speakers are important factors. . That is, even when the vocal microphone 10 is close to the monitor speakers SPM1 to SPM3, the angles ψ1 to ψ3 between the central axis M of the vocal microphone 10 and the reference axes Q1 to Q3.
Is smaller, the vocal microphone 10 is connected to the monitor speaker S
Howling hardly occurs because the sound from PM1 to SPM3 is not picked up very much. If the angle is close to 180 degrees, the vocal microphone 10 efficiently picks up sounds from the monitor speakers SPM1 to SPM3, so that howling tends to occur. Therefore, in the present embodiment, the distance d
The master level control data DCm1 to DCm3 are generated in consideration of 1 to d3 and the angles ψ1 to ψ3.

The master level control data DCm1 to DCm3 generated as described above are
8, the signal is converted into an analog signal and supplied to the mixer 22 'as master level control signals Cm1 to Cm3.

Next, the master level control signals Cm1 to Cm3 input to the mixer 22 'are output from the output amplifier 223c',
223d 'and 223e'. Output amplifier 22
3c ', 223d' and 223e 'are monitor speakers S
The master levels corresponding to PM1 to SPM3 are adjusted according to the master level control signals Cm1 to Cm3 (S3
6). Thereby, the volume of the monitor speakers SPM1 to SPM3 is automatically adjusted. As a result, even if the PA engineer does not operate the variable resistor VR of the mixer, it is possible to reliably prevent howling by following the movement (position and direction) of the vocal microphone 10.

<3. Third Embodiment> Hereinafter, a third embodiment of the present invention will be described.
The loudspeaker system C according to the embodiment will be described with reference to the drawings. <3-1: Overview of the loudspeaker system> FIG. 24 is a block diagram showing an electrical configuration of a loudspeaker system C according to the third embodiment of the present invention. The loudspeaker system C according to the third embodiment uses a wireless microphone 10 ′ instead of the vocal microphone 10, and first to third receivers 50 to 5.
2, except that the second embodiment uses the second embodiment. That is, the display device 21
As the mixer 22, the same mixer as that described in the first embodiment is used.

As will be described in detail later, in this loudspeaker system C, as shown in FIG. 27, the antenna of the first receiver 50 is arranged at the position Pa at the lower left corner of the stage, while the right The antenna of the second receiver 51 is arranged at the lower corner position Pb, and the first angle data Dφ indicating the microphone position angles φ1 and φ2 based on the radio wave intensity received by them.
The first and second angle data Dφ2 are generated. Then, the position of the wireless microphone 10 ′ on the stage is specified based on the first angle data Dφ1 and the second angle data Dφ2.

<3-2: Wireless Microphone> Next, the wireless microphone 10 'will be described. FIG. 25 is a block diagram illustrating a configuration of the wireless microphone 10 ′. As shown in the figure, the wireless microphone 10 'includes a microphone unit 11 and an adapter 12', and both are connected by connection connectors 11a and 12a. Therefore, also in the third embodiment, the microphone unit 11 that suits the singer's preference can be used as in the first embodiment.

The adapter 12 'includes FM modulators 41 to 4
3, an addition circuit 44, an amplification circuit 45, and an antenna 46, and an angle sensor 122 that outputs an attitude angle signal A1 and an azimuth signal A2. The FM modulators 41 to 43 are
The audio signal S, the attitude angle signal A1, and the azimuth angle signal A2 are FM-modulated, respectively, using the different carrier frequencies f1, f2, and f3 as center frequencies, and the modulated audio signal Ms, the modulated attitude angle signal Ma1, and the modulated An azimuth signal Ma2 is generated. The addition circuit 44 outputs these signals Ms, M
a1 and Ma2 are added to generate a frequency-multiplexed multiplexed signal SS. The multiplex signal SS is amplified by the amplifier circuit 45 and then transmitted by the non-directional antenna 46.

According to the wireless microphone 10 ', since the multiplex signal SS has not only voice information but also microphone direction information, the receiving side can know the microphone direction by separating the two. .

<3-3: First and second receivers>
The first and second receivers 50 and 51 will be described. FIG. 26 is a block diagram showing a configuration of the first receiver 50. Note that the second receiver 51 is configured in the same manner as the first receiver 50, and a description thereof will be omitted. As shown in the figure, the first receiver 50 includes first and second antennas 51.
1,512, first and second radio field intensity measurement units U
A, UB, and angle data calculation unit 513 are provided.

Here, the first and second receivers 50 and 51
The directivity of the first and second antennas 511 and 512 will be described with reference to FIG. In the following description, reference numeral 51 denotes the first and second antennas of the first receiver 50.
1a and 512a, and reference numerals 511b and 512b are used for the first and second antennas of the second receiver 51. In FIG. 27, the first and second antennas 511a and 512a of the first receiver 50 are arranged at a position Pa, and the first antenna 511a has directivity in the XA direction.
The second antenna 512a has directivity in the YA direction. Further, the first and second antennas 511b and 512b of the second receiver 51 are arranged at the position Pb, and the first antenna 511b has directivity in the XB direction, while the second antenna 512b has directivity in the YB direction. It has sex.
Therefore, the wireless microphone 1 is located at the position Pm shown in FIG.
If there is 0 ', the microphone position angle φ1 can be calculated based on the first radio wave intensity Vxa received by the first antenna 511a of the first receiver 50 and the second radio wave intensity Vya received by the second antenna 512a. it can. Similarly, the second receiver 51 can calculate the microphone position angle φ2 based on the first radio wave intensity Vxb and the second radio wave intensity Vyb.

The first and second radio wave intensity measurement units UA and UB shown in FIG. 26 are provided for measuring the first radio wave intensity Vxa and the second radio wave intensity Vya. The signal received by the first antenna 511 is amplified by the amplifier circuit 514A, passes through a band-pass filter 515A having a frequency f1 as a center frequency, and passes through a level detection circuit 516A.
Supplied to The level detection circuit 516A is configured to detect the signal amplitude of the output signal of the band-pass filter 515A, and may be configured by, for example, a dual-wave rectifier circuit and a low-pass filter that sufficiently attenuates the component of the carrier frequency f1. Thereby, the first radio field intensity measurement unit UA generates a first radio field intensity signal Va indicating the first radio field intensity Vxa. The second radio field intensity measurement unit UB has the same configuration as that of the first radio field intensity measurement unit UA, and the second radio field intensity signal V indicating the second radio field intensity Vya.
Generate b.

Next, based on the first radio field intensity signal Va and the second radio field intensity signal Vb, the angle data calculation section 513 outputs the first angle data D indicating the microphone position angle φ1 shown in FIG.
Generate and output φ1.

As described above, the first and second receivers 50, 5
1 generates the first angle data Dφ1 and the second angle data Dφ2, so that the position of the wireless microphone 10 ′ can be specified by combining it with the information of the positions Pa and Pb of the antenna. Therefore, in this example, the position of the microphone can be specified without incorporating a sensor (for example, an acceleration sensor) for specifying the position of the microphone.

<3-4: Third Receiver> Next, the third receiver 53 will be described. FIG. 28 is a block diagram illustrating a configuration of the third receiver 53. As shown in the drawing, the third receiver 53 includes an antenna 531, an amplification circuit 532, band-pass filters 533 to 535, and FM demodulators 536 to 536.
538.

The signal received by the antenna 531 is amplified by the amplifier circuit 532, and then amplified by the band-pass filters 533 to 533.
535. Bandpass filters 533-53
Reference numeral 5 denotes a band-pass filter having frequencies f1, f2, and f3 as center frequencies. Therefore, signals (corresponding to the signal SS shown in FIG. 25) frequency-multiplexed by the band-pass filters 533 to 535 are separated. As a result, the signals Ms ′ respectively corresponding to the above-described modulated voice signal Ms, modulated attitude angle signal Ma1, and modulated azimuth angle signal Ma2 are output from the band-pass filters 533 to 535.
Ma1 'and Ma2' are output. Then, by demodulating these signals with the FM demodulators 536 to 538, the audio signal S, the attitude angle signal A1, and the azimuth angle signal A2 are obtained.

<3-5: Operation of Display Device> Next, the operation of the display device 21 will be described with reference to the flowchart shown in FIG. First, the PA engineer operates the mouse 215 and the keyboard 216 of the display device 21 to input basic data Dc (S41), and subsequently inputs antenna position data (S42). In the example shown in FIG. 27, the XY coordinates of the position Pa ((0,
0)) and the XY coordinates of the position Pb ((Xd, 0) if the length of the stage in the longitudinal direction is Xd in this example). Under the control of the CPU 211, the input data
Stored in M214.

Next, the CPU 211 controls the first angle data Dcm1 and the second angle data Dcm1 supplied from the first and second receivers.
Microphone position data Dm indicating the position of the wireless microphone 10 'is generated based on the angle data Dcm2 and the position data of the antenna (s43). As a result, FIG.
In the example shown in FIG. 7, the XY coordinates of the microphone position Pm are calculated.

Thereafter, the CPU 211 transmits the microphone position data Dm, the posture angle data Da1, and the azimuth angle data Da.
2 to monitor 21 the position and orientation of the microphone.
7 is displayed (S45). This display processing is the same as that described in the first embodiment, and the position and orientation of the microphone can be notified to the PA engineer on the display screen shown in FIG.

As described above, in the third embodiment, the position of the wireless microphone 10 ′ is specified based on the radio wave intensity transmitted from the wireless microphone 10 ′. Sensor 1
There is no need to incorporate it in 2 '. In addition, the first and second
When the acceleration sensor 125 is used as described in the embodiment, the initial position of the microphone is required, but this input is not required in the present embodiment.

<4. Fourth Embodiment> Hereinafter, a fourth embodiment of the present invention will be described.
A loudspeaker system D according to the embodiment will be described with reference to the drawings. FIG. 30 is a block diagram illustrating a configuration of the loudspeaker system D according to the fourth embodiment. As shown in this figure, the loudspeaker system D uses the control device 21 ′ described in the second embodiment instead of the display device 21, and
The configuration is the same as that of the loudspeaker system C shown in FIG. 24, except that the mixer 22 'described in the second embodiment is used instead of 2.

In such a configuration, the control device 21 '
Generates microphone position data Dm of the wireless microphone 10 ′ based on the first and second angle data Dφ1 and Dφ2 and the position data of the antenna, and further uses the microphone position data Dm to describe in detail in the second embodiment. By performing the above-described sound image localization processing and howling prevention processing, the send level control signals Cs1 and Cs2 and the master level control signals Cm1 and Cs1
m2 and Cm3 are generated. Also, the mixer 22 ′
The send level and the master level are controlled based on these control signals. However, in this example, the third
As described in the embodiment, the microphone position data Dm is 2
Wireless microphone 1
The distance between 0 'and each of the monitor speakers SPM1 to SPM3 is obtained in two dimensions. In addition, wireless microphone 1
The orientation of 0 ′ is represented only by the azimuth angle θ2 without the posture angle θ1. Therefore, it is sufficient for the angle sensor 122 to output only the azimuth angle θ2.

Therefore, according to the loudspeaker system D, the wireless microphone 10 ′ without the built-in acceleration sensor 125 is used.
, The position and orientation of the microphone can be specified, and the mixer 22 'can be automatically controlled based on the result.
Thus, the sound image of the singer can be accurately localized and the howling can be surely prevented without the PA engineer visually grasping the microphone position and manually operating the mixer.

<5. Modifications> Although the embodiment according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications described below are possible. (1) In each of the embodiments described above, the vocal microphone 10 or the wireless microphone 10 'is described as one. However, a plurality of vocal microphones 10 or the wireless microphone 10' may be used. is there. In these cases, the sound image localization processing and the howling prevention processing described in each embodiment may be performed in parallel for each microphone.

(2) In each of the above embodiments, the direction of the vocal microphone 10 or the wireless microphone 10 'is detected. However, the present invention is not limited to this. In ', the angle sensor 122 may be omitted. In this case, based on the microphone position data Dm, the sound image localization processing and the howling prevention processing are performed. As described above, in howling prevention processing, the direction of the microphone is important, but howling is reduced by adjusting the master level lower than in the above-described embodiment according to the distance between the microphone and each of the monitor speakers SPM1 to SPM3. Can be prevented.

(3) In the above-described first to third embodiments, the angle sensor 122 detects the attitude angle θ1 and the azimuth angle θ2.
However, the present invention is not limited to this, and it goes without saying that an angle sensor that detects only the azimuth angle θ2 may be used similarly to the fourth embodiment.

(4) In the first and second embodiments described above, the spatial state of the vocal microphone 10 is detected using the angle sensor 122 and the acceleration sensor 125, while the third and fourth embodiments are used. , The angle sensor 1
Although the spatial state of the wireless microphone 10 ′ is detected by using 22, the present invention is not limited to this, and the spatial state of the microphone is detected by using other detecting means, Of course, the detection result may be used as the additional information, and may be synthesized with the sound information and output. For example, two acceleration sensors may be arranged on the central axis of the microphone, and an output signal of each acceleration sensor may be combined with an audio signal and output. In this case, the position of each acceleration sensor is calculated by the method described in the above-described embodiment,
The direction of the microphone can be specified from the position data.

(5) In each of the embodiments described above, the acceleration information and the orientation information indicating the spatial state of the microphone are added to the sound information as additional information in the adapter, but the feature of the present invention is that the microphone can be freely selected. At the point
The content of the additional information is not limited to the above-described embodiment, and may be any information. For example, when this adapter is applied to a karaoke microphone, a slide switch for inputting an instruction to raise or lower the musical scale by one semitone is provided on the adapter, and the instruction input information detected by the switch is added. You may make it synthesize | combine with sound information as information, and may output it. Also,
A volume that can adjust the degree of echo may be provided in the adapter, and instruction input information according to the operation of the volume may be combined with sound information as additional information and output.

[0095]

As described above, according to the present invention,
Since the position of the microphone is displayed on the display device or the mixer can be automatically adjusted based on the position information of the microphone, the PA engineer does not need to visually grasp the position of the microphone, and the sound image can be obtained. Accurate localization and howling can be reliably prevented. Further, according to the microphone adapter according to the present invention, the microphone can be freely selected, so that the singer can use a microphone suitable for his / her preference, and further can synthesize and output additional information with sound information.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a concert hall to which a loudspeaker system A according to a first embodiment of the present invention is applied.

FIG. 2 is a block diagram showing an electrical configuration of a loudspeaker system A according to the embodiment.

FIG. 3 is a perspective view showing an overview of a vocal microphone 10 used in the system.

FIG. 4 is a block diagram showing a configuration of an adapter 12 used for the microphone.

FIG. 5 is a conceptual diagram for explaining an attitude angle θ1 and an azimuth angle θ2 of the microphone.

FIG. 6 is a diagram showing a subframe format of microphone output data Dout of the microphone.

FIG. 7 is a block diagram of a display device 21 used in the system.

FIG. 8 is a functional block diagram for explaining functions of a CPU 211 in the display device.

FIG. 9 is a flowchart showing an operation of the display device.

FIG. 10 is a diagram showing an example of an input screen of the display device.

FIG. 11 is a diagram showing an example of a screen for displaying the position and orientation of the microphone on the display device.

FIG. 12 is a block diagram of a mixer 22 used in the system.

FIG. 13 is a diagram showing an example of a screen of the display device when performing a howling prevention operation.

FIG. 14 is a diagram showing an example of a screen of the display device when performing a sound image localization operation.

FIG. 15 is a block diagram illustrating an electrical configuration of a loudspeaker system B according to a second embodiment of the present invention.

FIG. 16 is a functional block diagram for explaining functions of a CPU 211 in a control device 21 ′.

FIG. 17 is a block diagram illustrating a main configuration of a mixer 22 ′ used in the system.

FIG. 18 is a flowchart illustrating automatic adjustment of sound image localization in the same system.

FIG. 19 is an explanatory diagram for explaining the concept of sound image localization.

FIG. 20 is a diagram illustrating an example of storage contents of a panning table TBLa used for a sound image localization process.

FIG. 21 is a flowchart for explaining automatic adjustment for preventing howling.

FIG. 22: Monitor speaker SPM2 and vocal microphone 1
FIG. 7 is a diagram for specifically explaining a positional relationship of 0.

FIG. 23 is a conceptual diagram of a two-dimensional control table TBLb used for howling prevention processing.

FIG. 24 is a block diagram illustrating an electrical configuration of a loudspeaker system C according to a third embodiment of the present invention.

FIG. 25 shows a wireless microphone 1 used in the system.
It is a block diagram which shows the structure of 0 '.

FIG. 26 is a block diagram showing a configuration of a first receiver 50 used in the system.

FIG. 27 is an explanatory diagram for explaining the directivity of first and second antennas 511 and 512 of first and second receivers 50 and 51 used in the system.

FIG. 28 is a block diagram showing a configuration of a third receiver 53 used in the system.

FIG. 29 is a flowchart showing the operation of the display device 21 used in the system.

FIG. 30 is a block diagram showing a configuration of a loudspeaker system according to a fourth embodiment.

[Explanation of symbols]

A, B, C, D ... loudspeaker system, 10 ... vocal microphone (microphone), 10 '... wireless microphone (microphone), 11 ... microphone unit (converter), 122 ... angle sensor (direction information detection) Part), 12
5 Accelerometer (acceleration detector), 129 Digital audio format converter (synthesizer), 217
... monitor (display unit), 21 ... display device, 21 '...
Control device (control signal generation unit), 22, 22 '... mixer, 30 ... separation unit, 31 ... microphone position calculation unit (position information generation unit), 44 ... addition circuit (synthesis unit), 45 ...
Amplifying circuit (transmitting unit), 46 antenna (transmitting unit), 5
33 to 535: band-pass filter (separation unit), 53
6 to 538: FM demodulator (demodulation unit), Cs1, Cs2
... Send level control signal (control signal), Cm1 to Cm
2 ... Master level control signal (control signal), Dout ...
… Microphone output data (microphone output information), SPM1 to SP
M3: monitor speaker, SPL, SPR: left / right channel loudspeaker (loudspeaker), S: voice signal (sound information), A1: attitude angle signal (direction information, additional information), A2: azimuth Angle signal (direction information, additional information), B
x, By, Bz ... XYZ axis acceleration signals (acceleration information,
Additional information).

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04R 5/027 H04R 5/04 C 5/04 H04S 7/00 F // H04S 7/00 G01P 15/00 A F term (reference) 5D011 AA02 AB00 5D017 BD05 BD10 5D020 BB01 BB06 CC01 CC02 CC06 5D062 CC01 CC13 DD10

Claims (21)

[Claims] 1. A microphone having a conversion unit that converts sound into an electric signal and outputs sound information, an acceleration detection unit that detects acceleration of the microphone to generate acceleration information, the sound information and the acceleration information. And a combining unit for combining and outputting the signals. 2. A microphone having a conversion unit that converts sound into an electric signal and outputs sound information, a direction information detection unit that detects a direction of the microphone and outputs direction information, and the sound information and the direction. And a combining unit for combining and outputting information. 3. A microphone having a conversion unit for converting sound into an electric signal and outputting sound information, wherein the acceleration detection unit detects acceleration of the microphone to generate acceleration information, and detects a direction of the microphone. A microphone comprising: a direction information detecting unit that outputs direction information; and a combining unit that combines and outputs the sound information, the acceleration information, and the direction information. 4. The apparatus according to claim 1, wherein the direction information detecting unit includes an angle detecting unit that detects an attitude angle and an azimuth angle of the microphone and outputs the attitude angle information and the azimuth angle information. 4. The microphone according to 2 or 3. 5. The synthesizing unit generates data conforming to a digital audio format including audio data and user data in a subframe, and assigns the audio information to audio data bits in the subframe. The microphone according to claim 3, wherein the acceleration information and the orientation information are assigned to the user data bits. 6. A microphone adapter used together with a microphone for converting sound into an electric signal and outputting sound information, comprising: an input connector for connecting the microphone to a main body; and an additional information generating unit for generating additional information. And a synthesizing unit for synthesizing the sound information supplied via the input connection connector and the generated additional information to generate output information. 7. The microphone adapter according to claim 6, further comprising an output connection connector for connecting a connection cable to the main body, and outputting the output information via the output connection connector. 8. The microphone adapter according to claim 6, further comprising a transmission unit for modulating and transmitting output information. 9. The microphone adapter according to claim 6, wherein the additional information is information indicating a spatial state of the main body. 10. The microphone adapter according to claim 6, wherein the additional information generation unit has an acceleration sensor, and generates acceleration information indicating the acceleration of the main body as the additional information. 11. The microphone adapter according to claim 6, wherein the additional information generation unit has an angle sensor, and generates angle information indicating a direction of the main body as the additional information. 12. A display device for displaying a state of the microphone based on microphone output information in which additional information indicating a spatial state of the microphone and audio information are combined, wherein the additional information is obtained from the microphone output information. A display device comprising: a separation unit that separates information; and a display unit that displays a spatial state of the microphone based on the separated additional information. 13. The additional information includes acceleration information indicating acceleration of the microphone, the separation unit separates the acceleration information from the microphone output information, and the display unit displays the acceleration information as 2 A position information generation unit that generates position information indicating a current position of the microphone based on the movement information obtained by the multiple integration and the initial position information of the microphone that is input in advance, and based on the position information, The display device according to claim 12, wherein a position of the microphone is displayed. 14. The additional information includes acceleration information indicating an acceleration of the microphone and direction information indicating a direction of the microphone, wherein the separation unit determines the acceleration information and the direction from the microphone output information. Position information indicating the current position of the microphone based on movement information obtained by double integrating the acceleration information and initial position information of the microphone which is input in advance. 13. The display device according to claim 12, further comprising: a position information generating unit configured to generate a position of the microphone based on the position information and to display a direction of the microphone based on the direction information. 14. . 15. A mixer for adjusting a level of an output signal supplied to a plurality of speakers based on microphone output information obtained by combining additional information indicating a spatial state of a microphone and audio information, wherein the microphone A separating unit that separates the additional information and the audio information from the output information; a control signal generating unit that generates a control signal based on the separated additional information; and a separated audio based on the generated control signal. A mixer for adjusting the level of information to generate each of the output signals. 16. The additional information includes acceleration information indicating an acceleration of the microphone, wherein the separation unit separates the acceleration information and the audio information from the microphone output information, respectively, A position information generation unit that generates position information indicating a current position of the microphone based on movement information obtained by performing a double integration of the acceleration information and initial position information of the microphone that is input in advance. The mixer according to claim 15, further comprising: generating the control signal so as to localize a sound image of the microphone based on the position information. 17. The control apparatus according to claim 17, wherein the additional information includes acceleration information indicating an acceleration of the microphone, the separation unit separates the acceleration information and the audio information from the microphone output information, The unit includes a position information generation unit that generates position information indicating a current position of the microphone based on movement information obtained by double integrating the acceleration information and initial position information of the microphone that is input in advance. Calculating a distance between the microphone and the monitor speaker based on the position information and the position information of the monitor speaker input in advance, and generating the control signal according to the calculated distance. The mixer of claim 15, wherein: 18. The additional information includes acceleration information indicating an acceleration of the microphone and direction information indicating a direction of the microphone, wherein the separation unit calculates the acceleration information from the microphone output information,
The direction information and the audio information are separated from each other, and the control signal generation unit is configured to control the microphone based on movement information obtained by double integrating the acceleration information and initial position information of the microphone input in advance. And a distance between the microphone and the monitor speaker based on the position information and the previously input position information of the monitor speaker, and a reference connecting the both. An axis is specified, an angle between a central axis of the microphone specified by the orientation information and the reference axis is calculated, and the control signal is generated based on the calculated distance and angle. 15. The mixer according to 15. 19. A loudspeaker comprising: a plurality of loudspeakers arranged toward the audience; and a monitor speaker arranged on a stage for allowing a singer to hear his or her singing voice, wherein the singer's voice is amplified to amplify the singer's voice A loudspeaker and a loudspeaker system for emitting sound from the monitor speaker, a singer's wireless microphone, and position information generation for measuring the intensity of radio waves transmitted from the wireless microphone to generate position information indicating the position of the wireless microphone A display device that displays the position of the wireless microphone in a stage image based on the generated position information; a receiver that receives radio waves transmitted from the wireless microphone and reproduces audio information; Speaker for amplifying amplified speech information Loudspeaker system is characterized in that a mixer for adjusting the level of the output signal outputted to the spare the monitor speaker. 20. The wireless microphone, wherein the conversion unit converts voice into an electric signal and outputs voice information;
A direction information detection unit that detects the direction of the microphone and outputs direction information, and a transmission unit that transmits a frequency-multiplexed signal by modulating each of the audio information and the direction information with a different carrier frequency, The receiver includes: a separating unit that separates a frequency of a received signal; and a demodulating unit that demodulates each of the separated signals to reproduce the audio information and the position information. The display device includes a generated position. The position of the wireless microphone is displayed in the stage image based on the information, and the position of the monitor speaker is displayed in the stage image based on the pre-stored position information of the monitor speaker. 20. The loudspeaker system according to claim 19, comprising displaying the orientation of the wireless microphone based on the wireless microphone. 21. A loudspeaker method for amplifying audio information and emitting sound from a plurality of speakers, comprising: a microphone for detecting audio information obtained by converting a voice into an electric signal and a spatial state of the microphone; The additional information is synthesized and output as microphone output information, the audio information and the additional information are separated from the microphone output information, and the level of the audio information is adjusted based on the separated additional information. And generating each output signal to be output to the plurality of speakers.