JPH057839Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a conference audio system installed in a conference venue where a large number of conference participants gather together.

(Prior art) A conference audio system installed in a conference hall includes a large number of microphone devices installed at each seat of conference participants, a main amplifier equipped with an adjustment console installed in an acoustic adjustment room, and a main amplifier equipped with an adjustment console installed in an acoustic adjustment room. It also includes a plurality of speakers installed in addition to the above, and is further provided with a microphone selection operation device that allows an operator to turn on/off a microphone device located at the speaker's seat.

In addition, the adjustment desk installed in the above-mentioned sound adjustment room is equipped with a system for adjusting the amplification degree of the microphone amplifier installed in each microphone device in the conference room to compensate for individual differences in speaker volume. Equipped with audio signal conditioner. FIG. 2 is a block diagram showing an example of the configuration of a conference audio system equipped with a conventional audio signal conditioner. Reference numeral 2 designates an audio signal amplification section installed in the aforementioned acoustic adjustment room, 21 represents an audio signal amplifier which is the aforementioned main amplifier, and 22 represents an audio signal adjuster. 3 is a microphone device arranged at the conference seat in the conference room, 31 is a microphone unit, 33
35 is a microphone amplifier with an on/off switch function; 35 is a microphone operation indicator; and 37 is a control unit that turns on the microphone amplifier 33 and lights up the microphone operation indicator 35 when selected by the microphone selection operation section 4; This is a microphone controller that performs Reference numeral 4 designates the aforementioned microphone selection operation section installed above the operator's seat, and reference numeral 41 designates the microphone selection switch 42, which sends a control signal consisting of the microphone device number selected by the operator to the microphone device 3, and This is a selection controller that controls the operation indicator light 43 to be turned on. Microphone device 3
The microphone controller 37 turns on the switch of the microphone amplifier 33 and turns on the microphone operation indicator 35 if the microphone device number is its own based on the control signal sent from the microphone selection operation section 4. . If the microphone device number is not your own, the above operation is reversed or nothing is performed.

The audio signal adjusters 22 of the audio signal amplification section 2 are configured of, for example, variable resistors, and are provided in equal numbers to the number of microphone devices 3. Each audio signal conditioner 22 is connected to the corresponding microphone device 3 via an individual audio signal line, and is connected to a microphone amplifier 33 . Therefore, the audio signals from the microphone device 3 can be individually adjusted by the audio signal adjuster 22.

(Problems to be solved by the invention) Since the audio signal conditioner 22 is connected to each microphone amplifier 3 using individual audio signal lines, as the scale of the conference hall increases, As the number of audio signal lines increases, the wiring space increases, resulting in an increase in construction costs.

(Means for Solving the Problems) In order to eliminate the above-mentioned drawbacks, the present invention includes a microphone device that includes a variable amplification type amplifier that can control the amplifier, and a variable amplification type amplifier that can control the amplification degree of the variable amplification type amplifier. a microphone control unit to control, a regulator selection switch for selectively connecting one of the plurality of audio signal regulators, and a selection signal generator for generating a signal for selectively driving the regulator selection switch;
a number identifier for identifying the number of the microphone device selected by the microphone selection operation section; a level detector for detecting the level set in the audio signal adjuster selectively connected to the adjuster selection switch; a control signal generator that generates a control signal consisting of a set level value detected by the detector and a microphone device number from the microphone selection operation section; and a control signal generator that directs the control signal from the control signal generator to the microphone device. An audio signal conditioner is provided, which includes an input/output control unit that receives a microphone device number from a microphone selection operation unit and sends it to a number discriminator. This allows the levels to be adjusted individually.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention, in which the same symbols as in FIG. 2 are the same, 1 is an audio signal adjustment control section according to the present invention, 11 is an input/output control section, 1
2 is a number identification unit that identifies the number of the selected microphone device; 13 is a selection signal generator that generates a signal to select and drive the switch corresponding to the identified number; and 14 is a circuit that uses the microphone device number and the audio signal adjuster 17. 15 is a level detector that detects the level of the audio signal set by the audio signal adjuster 17; 16 is the audio signal adjuster 1;
This is a regulator selection switch that connects the level detector 15 to a selected one of the regulators. In the microphone device 3, 32 is a variable amplification type amplifier that can adjust the amplification degree, and 34 is an audio signal adjustment control section 1.
The variable amplification level amplifier 3 is controlled by a control signal from
Microphone operation indicator light 3
This is a microphone controller that turns on/off the microphone.

(Function) When the operator presses the microphone selection switch 42 corresponding to the microphone device 3 on the seat of the conference member who is about to speak, the selection controller 41 directs the microphone to the audio signal adjustment control section 1. Sends a control signal consisting of a device number. The input/output control section 11 receives this and transfers it to the number discriminator 12. The number identifier 12 identifies the received microphone number and sends it to the selection signal generator 13, which generates a signal for selectively driving the regulator selection switch 16. The regulator selection switch 16 selects a corresponding one of the audio signal regulators 17 based on the signal from the selection signal generator 13 and connects it to the level detector 15 . The level detector 15 detects the set level of the connected audio signal regulator 17 and outputs the set level to the control signal generator 14. The control signal generator 14 generates a control signal necessary for selection and control of the microphone device 3, which includes the microphone number from the number identifier 12 and the setting level from the level detector 15, and controls the input/output controller 11. send to The input/output control section 11 sends the control signal to the control signal line. The microphone controller 34 identifies the control signal sent through the control signal line, and if it is your own number, the amplification level of the variable amplification type amplifier 32 is adjusted based on the set level of the sent audio signal adjuster 17. and lights up the microphone operation indicator light 35.

When the speaker starts speaking, if the volume emitted from the speaker is insufficient, the corresponding audio signal adjuster 17 operator can adjust the volume to a suitable volume.

If the control signal sent through the control signal line is not your own number, or if you want to cancel the selection, the microphone controller 34 controls the amplification of the variable amplification type amplifier 32 to be the lowest, The microphone operating light 35 is controlled to be in an OFF state.

Note that the audio signal regulator 17 can be configured with a manual rotary or linear sliding type variable resistor, or can be configured with a digitally controlled electronic variable resistor using an up switch and a down switch. It is also possible to configure

(Effects of the invention) As explained above, according to the invention, the number of audio signal lines is only one, which greatly improves the wiring space and significantly reduces construction costs. You can save money, and you can also set the audio signal level.
There are advantages such as the ability to perform independent adjustment for each of a large number of microphone devices with a small number of audio signal conditioners.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of the configuration of a conference audio system equipped with a conventional audio signal conditioner. DESCRIPTION OF SYMBOLS 1...Audio signal adjustment control section, 2...Audio signal amplification section, 3...Microphone device, 4...Microphone selection operation section, 11...Input/output control section, 12...
...Number identifier, 13...Selection signal generator, 14...
... Control signal generator, 15 ... Level detector, 16
...Adjuster selection switch, 17...Audio signal adjuster, 21...Audio signal amplifier, 31...Microphone unit, 32...Variable amplification amplifier, 3
3...Microphone amplifier, 34...Microphone controller, 35...Microphone operation indicator, 4
1... Selection controller, 42... Microphone selection switch, 43... Operation indicator light.

Claims (1)

[Scope of utility model registration request] A plurality of microphone devices 3 that receive a control signal and turn on the amplifier and turn on a microphone operation indicator light when the microphone device is one's own select one of the plurality of microphone devices 3 and turn on the corresponding operation indicator light. In a conference audio system equipped with a microphone selection operation section 4 that lights up and sends out a corresponding microphone device number and an audio signal amplification section 2, the microphone device 3 is provided with a variable amplification type amplifier 32 that can control the amplification degree. and a microphone controller 34 that controls the amplification of the variable amplification type amplifier 32 in response to the control signal, and one of the plurality of audio signal adjusters 17 serves as the audio signal adjustment control section 1. a regulator selection switch 16 that selects and connects the regulator selection switch 1;
a selection signal generator 13 that generates a signal for selectively driving the microphone 6, a number identifier 12 that identifies the microphone device number selected by the microphone selection operation section 4, and a level set by the audio signal adjuster 17. a level detector 15 for detecting; a control signal generator 14 for generating a control signal consisting of the detected setting level value and the microphone device number;
an input/output control section 1 that receives a microphone device number from the microphone selection operation section 4, sends it to the number identifier 12, and sends a control signal from the control signal generator 14 to the microphone device 3;
1. A conference audio system comprising: 1, wherein audio signal levels from a plurality of microphone devices can be individually adjusted using a single audio signal line.