JP3056171B2 - Loudspeaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker for transmitting voice information to a wide area, and more specifically, to eliminate voice interference at each point due to a difference in transmission conditions from a plurality of loudspeakers. The present invention relates to a loudspeaker.

[0002]

2. Description of the Related Art Conventionally, loudspeakers connected from a loudspeaker to a loudspeaker at an audio information transmission line are installed at a plurality of points in an area, so that various kinds of guidance and urgent notices can be provided to a wide range of local residents. Various types of notification information are broadcast simultaneously.

FIG. 6 shows such a loudspeaker and a plurality of outdoor locations.
This shows the general configuration of the loudspeaker installed at the point.
You. In this case, the speaker 10 is used as a loudspeaker.
A microphone equipped with various notification information to be transmitted
Speak through. This transmission desk 10 has transmission transmission paths respectively.
11₁, 11_TwoLoudspeakers 12 connected via
₁, 12_TwoConnected. These loudspeakers 12₁, 12_Two
Is installed at a predetermined plurality of outdoor locations.
3₁, 13_TwoIs provided from the high position to the surrounding area
Speaker 14 for outputting various notification information₁₁, 1
4₁₂, 14_{twenty one}, 14 _{twenty two}And transmission transmission line 11₁, 11_TwoThrough
These speakers 14 transmitted as₁₁, 14 ₁₂, 1
4_{twenty one}, 14_{twenty two}Properly amplify the transmission information output from
Audio amplification control device 15₁, 15_TwoAnd But
That is, the microphone provided by the transmitter 10
The voice information transmitted through the transmission line 11₁, 1
1_TwoLoudspeaker 12 through₁, 12_TwoFrom the surrounding area
It is. Such a loudspeaker 12₁, 12_TwoEach service area
A. Each speaker 14₁₁, 14₁₂, 14_{twenty one}, 14_{twenty two}From
Each zone 1 as a transmission range of output notification information
6₁, 16_TwoInside. The local residents will be able to
Recognition of various notification information by voice information from speaker
Will do.

[0004] Generally, due to natural conditions such as wind and temperature, natural conditions such as wind and temperature, as well as various environmental factors such as artificial buildings and artificial noises, the notification information by the voice loudspeaked outdoors is attenuated. Or it is adversely affected by reverberation. Therefore, a loudspeaker installed outdoors is installed in consideration of such various installation parameters. Further, as the service area provided by the loudspeakers as described above, it is necessary to arrange the loudspeakers so that there is no portion where the notification information to be broadcast simultaneously is not transmitted in the entire area.
However, the zone as the service area of each loudspeaker is usually within a range circle having a radius substantially equal to the distance from the speaker, so that adjacent zones necessarily inevitably overlap.

Now, consider a point 18 of an overlapping zone 17 corresponding to an overlapping portion of zones 16 ₁ and 16 ₂ in FIG. At point 18, the speakers 14 ₁₂ and 14 ₂₁
Is notified of audio information. Therefore, when the distance 19 ₁ between the point 18 and the speaker 14 _{12 in the} zone 16 ₁ is not equal to the distance 19 ₂ between the point 18 and the speaker 14 _{21 in the} zone 16 ₂ , audio information is notified from both speakers. Since the distances from these speakers are different, there is a problem that the sound information that can be heard at the point 18 at a certain point in time interferes due to the difference in the propagation distance of the sound information output almost simultaneously from the speakers.

For example, a voice signal transmitted by a speaker from the desk 10 is simultaneously output as voices from the speakers 14 ₁₁ , 14 ₁₂ , 14 ₂₁ , 14 ₂₂ of the loudspeakers 12 ₁ , 12 ₂ . At point 18, loudspeaker 12 ₂ is better than loudspeaker 1
Because of the closer 2 _1, Introduction hear sound from the loudspeaker 12 _2, so that the subsequent voice from the loudspeaker 12 ₁ hear. Therefore, at the same time, the sounds heard from the loudspeakers 12 ₁ and 12 ₂ are different. In this way, the sounds from the plurality of loudspeakers are heard interferingly one after another, so that the intelligibility becomes very poor.

[0007] To deal with the problem of interference of audio information from adjacent zones as described above, a technique relating to a loudspeaker for avoiding the interference of the audio information is disclosed in, for example, Japanese Patent Laid-Open No. 57-5020.
No. 0, "Outdoor loudspeaker system". This loudspeaker is characterized by avoiding interference of audio information in adjacent zones by devising the arrangement of zones as service areas of each loudspeaker and the output timing of audio information from each loudspeaker. . That is, each zone is divided into a plurality of groups, the zones are arranged so that the zones of the same group are not adjacent to each other, and the output timing of audio information from the loudspeakers of each group is output with a time difference. . As a result, even at a point where the user can easily hear the sound at the point 18, the loudspeakers do not output the voice information at the same time. Therefore, it is possible to avoid the interference of the voice information from the adjacent zone, which has conventionally been a problem. Will be able to

[0008]

However, Japanese Unexamined Patent Publication No.
In the technology related to the loudspeaker disclosed in Japanese Patent Application Laid-Open No. 7-50200, a zone serving as a service area of each loudspeaker is divided into a plurality of groups, and a time difference is provided for each of the groups, so that audio information is temporarily stored. Expensive memory is required for this purpose, and the cost increases. Furthermore, if audio information from adjacent zones is output at least in the same time with a little overlap, interference of the audio information also occurs. Therefore, the longer the content of the talker's transmission, the more it is necessary to increase the capacity of the memory for storing the content of the transmission, and the more expensive the device.

By the way, when a plurality of loudspeakers are installed outdoors and a broadcast is performed using a loudspeaker connected to the loudspeakers, a speaker transmits the loudspeakers so that the voices output from the loudspeakers do not interfere with each other. It has been empirically practiced to divide a sentence of a story into short segments, leave a space between the separated sentences and a sentence, and slowly speak the contents of the sentences. However, it is very difficult to speak at such a transmission pace,
An unfamiliar speaker has no idea what rate to speak. Furthermore, even in an emergency such as a disaster, if it is not possible to broadcast at such a transmission rate, it becomes impossible to transmit important information to local residents, which is fatal.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a loudspeaker for notifying a transmitter of an optimum transmission pace and reducing the cost.

[0011]

According to the first aspect of the present invention, (a) voice information input means for inputting voice information to be amplified, and (b) the voice information is input from the voice information input means. Voice information input determining means for determining that
(C) first timer means for starting clocking when the voice information input determining means determines that the voice information has been input, and for counting a first predetermined time;
(D) The loudspeaker is provided with display means for performing a display corresponding to the remaining time up to the first time based on the time measured by the first time measuring means.

That is, in the first aspect of the present invention, the voice information to be loudspeaked input from the voice information input means is monitored by the voice information input determination means to determine whether or not the voice information has been input. The first time is measured by the first time measuring means. The display means performs a display corresponding to the remaining time corresponding to the time measured by the first time measuring means.

According to the second aspect of the present invention, (a) voice information input means for inputting voice information to be amplified, and (b) voice information for determining that the voice information has been input from the voice information input means. Input determining means, (c) first time measuring means for measuring a predetermined first time, and (d) time measuring is started when the first time measuring means times out, and a second predetermined time is measured. (E) when the voice information input detecting means determines that the voice information has been input or when the second clock means times out, First time-measurement start means for starting time measurement by the time-measurement means;
And a display means for performing a display corresponding to the remaining time up to the first time based on the time measured by the time measuring means.

That is, according to the second aspect of the present invention, the voice information to be loudspeaked input from the voice information input means is monitored by the voice information input discriminating means to determine whether or not the voice information has been input. The first time is measured by the first time measuring means. At the time-out of the first time-measuring means, the second time-measuring means further measures a second time which is predetermined in advance. In addition, the first timekeeping means is used when the voice information to louder is input,
The time is also measured when the second time measuring means times out. The display means performs a display corresponding to the remaining time according to the time measured by the first time measuring means.

According to a third aspect of the present invention, in the loudspeaker according to the second aspect, the first time is a time corresponding to the length of the content of the transmission, and the second time is an interval to be left in the middle of the transmission. It is characterized by the time corresponding to.

In other words, according to the third aspect of the present invention, the first and second times are respectively set to a time corresponding to the length of the content of the transmission and a time corresponding to the interval to be left in the middle of the transmission. Based on the experience of the sender, talk with a space between the separated sentences so that the sounds output from the loudspeakers do not interfere with each other, and leave a space between the separated sentences. It is possible to appropriately notify the sender of the transmission pace at which the user was transmitting.

According to a fourth aspect of the present invention, in the loudspeaker according to the second or third aspect, first and second time-measuring time changing means for changing the first and second times are provided. I have.

That is, according to the fourth aspect of the present invention, the first and second times are changed by the first and second time-measuring time changing means, so that the adjacent loudspeakers and a plurality of loudspeakers are installed according to the installation situation. It becomes possible to provide a loudspeaker in which interference of audio information in the zone is small.

According to a fifth aspect of the present invention, in the loudspeaker according to the second to fourth aspects, the display means comprises a plurality of light emitting diodes, and the number of light emitting diodes to be turned on depends on the remaining time until the first time. Is changed.

That is, according to the fifth aspect of the present invention, the display means is changed by a plurality of light emitting diodes according to the remaining time up to the first time, so that the number of lights is changed based on the experience of the conventional speaker. In order to avoid interference between the voices output from the loudspeakers, the separated sentence was spoken with a space between the sentences and the sentence was sent with a space between the separated sentences, The speaker can be properly notified, and a very inexpensive loudspeaker can be provided.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 schematically shows the configuration of a loudspeaker according to an embodiment of the present invention. This loudspeaker
The display device 30 includes a display 30 for displaying a transmission pace to a transmitter, and a driver 32 for driving a display data signal via a display control bus in accordance with a display instruction output from a control device 31. The control device 31 generates a transmission pace based on a voice signal input by the transmitter through the microphone 33, and performs display on the display 32 corresponding to the generated transmission pace. Further, the microfan 33 is electrically connected to the audio amplifier 35, and the voice information of the sender input through the microfan 33 is transmitted as an electric signal and is transmitted to the audio amplifier 35.
Amplified by The amplified audio signal 36 amplified by the audio amplifier 35 is transmitted to a plurality of loudspeakers installed outdoors. In each loudspeaker, the amplified voice signal 36 transmitted in this manner is amplified again to output sound from the speaker of the loudspeaker in order to compensate for the deterioration at the time of transmission.

The control device 31 of the loudspeaker in this embodiment
Has a variable resistor 37, and the variable resistor 37
The display control unit 38 can generate display information to be displayed on the display 30 in accordance with the variable resistance value according to. The desk 10 is provided with a volume for adjusting the transmission pace by the transmitter, and by operating this volume, the resistance value of the variable resistor 37 directly connected to the volume changes. Therefore, the speaker changes the resistance value of the variable resistor 37 by operating a knob such as a volume, so as to refer to the transmission pace displayed on the display 30 in accordance with the resistance value and to adjust the appropriate value. The voice information can be output from a plurality of loudspeakers at the timing.

FIG. 2 shows a display form of the display 30 in this embodiment. Display 3 in the present embodiment
0 means that multiple light emitting diodes (Light Emitting Diod
e: Hereinafter, abbreviated as LED. ) 40 ₁ to 40 ₈ , and the sender performs voice input of information to be notified through the microphone while checking the number of lights of these LEDs. In other words, the display 30 indicates that even if the transmission is performed while the LED is lit, the timing is such that there is very little interference at each point in the area. Indicates that there is time remaining.

The control device 31 capable of generating a transmission pace by using a plurality of LEDs is provided by a central processing unit (Ce).
ntral Processing Unit: Hereinafter abbreviated as CPU. ), And can be executed based on a program stored in the memory.

FIG. 3 shows an outline of the main components of the control device 31. In the control device 31, a CPU 50 is connected to a memory 52 and a timer 53 via a bus 51. The bus 51 is also connected to a microphone 33 external to the control device 31, so that the CPU 50 can detect a voice input through the microphone 33. Further, in this control device 31,
One end of the resistor 54 having a predetermined resistance value R ₀ is connected to the power supply voltage Vc.
One end of a variable resistor 37 is connected to the other end of the variable resistor 37. This variable resistor 37
Is connected to a ground line for supplying a ground potential. An A / D converter 56 for converting an analog voltage value to a digital value is connected to a connection point 55 between the resistor 54 and the variable resistor 37. The A / D converter 56 receives the analog voltage value at the connection point 55 and is connected to the bus 51 to output a value obtained by converting this voltage value into a digital value. As a result, the power supply voltage Vcc is
The digital value of the voltage dividing resistance value by the variable resistor 4 and the variable resistor 37 can be obtained from the A / D converter 56.

The CPU 50 is connected to the control device 3 via the bus 51.
1 can be monitored and controlled, and the control is executed based on a program stored in a part of the memory 52. The memory 52 includes a CPU 50
Is used as a work memory for storing not only a control program indicating the contents of the control but also various other intermediate results. The timer 53 can count the count set by the CPU 50 in synchronization with a timing clock (not shown). When the count reaches the count set by the CPU 50, the timer 53 can notify the outside as a timeout. I can do it. The CPU 50 recognizes the time-out of the timer 53 by polling or by inputting an interrupt.

Next, an outline of various control contents in the CPU 50 will be described. The CPU 50 roughly performs two types of control.

The first control is a control for setting a timer value to be set in the timer 53 according to the value of the volume for adjusting the transmission pace provided in the transmission desk 10 before the operation of the loudspeaker. It is. The first timer value is the time T ₁ corresponding to the length of the transmission content by the talker. The second timer value is
Is the time T ₂ in response to the start of counting time after time-out. Conventionally, based on the talker's experience, but speech with each other output from the loudspeaker was separated short transmission sentence so as not to interfere, a first timer value T ₁ is a plurality of LED 1
The time for turning off the LEDs one by one, and the time until all the LEDs are finally turned off, corresponds to the time for speaking the short divided text. Further, conventionally, based on the experience of the speaker, the speech output from each loudspeaker was talked so as to leave a space between the divided sentences so as not to interfere with each other, but the second timer value T ₂ Is equivalent to the space between sentences. Such first and second timer values T ₁ ,
T ₂ is the number of loudspeakers installed in the area, the size of the service area, and the distance between this observation point and both loudspeakers in adjacent zones at an observation point in an area where adjacent zones overlap. Based on the difference between

The second control is a display control of the display 30 in accordance with the timeout state of the timer 53. Display 30
In order to visually notify the talker of the remaining time indicating that the talk timing is low, a plurality of LEs are provided.
D is turned off one by one in order from the full lighting state. This allows the sender to recognize at any glance that the content of the transmission is appropriately transmitted to all the local residents, regardless of the situation.

FIG. 4 shows an outline of the control for setting the timer value, which is the first control by the CPU 50. At the time of initialization at the time of starting the apparatus, first, the CPU 50 is caused to detect a voltage dividing resistance value at a connection point 55 by the resistor 54 and the variable resistor 37. This is because the analog voltage value obtained by dividing the power supply voltage Vcc by the resistor 54 and the variable resistor 37 is converted into a digital value by the A / D converter 56, so that the CPU 50 This value may be read by accessing 56. Then, the CPU 50 compares the read value with a predetermined value. At this time, the CPU 50 holds a previous value as a predetermined value to be compared, and detects whether or not there is a change to this value.
7, it is determined whether or not the resistance value itself has changed (step S60). Step S60 If it is not determined change in the variable resistance value is in: in (step S60 N), the exit the setting control timer value without changing the first and second timer values T _1, T ₂ should be set as Yes (end). When a change in the variable resistance value is determined in step S60 (step S60: Y), the A / D converter 56 does not match the held previous value.
Generates a count value C ₁ corresponding to the value read from. The timer 53 counts the first timer value T ₁ by counting the count value C ₁ in synchronization with a predetermined timing clock. Thus the count value C ₁ generated in the is adapted to count value corresponding from several count value determined in accordance with the pre-dividing resistor value is selected. Although not shown in FIG. 3, the count value C ₂ corresponding to the second timer value T ₂ in the same manner are set when the predetermined value inconsistent (step S62).

FIG. 5 shows the outline of the display control of the display 30 which is the second control by the CPU 50.
In the following, it is assumed that the number of LEDs of the display 30 is eight as shown in FIG.
(Where i is a natural number satisfying 1 ≦ i ≦ 8). When the values of the first and second timer values T ₁ and T ₂ are set as described above at the time of starting the apparatus, all the LEDs 40 ₁ to 40 ₁ of the display 30 are transmitted to the driver 32.
40 ₈ is lit (step S70), detects whether or not there is a voice input by the talker from built-in microphone 33 in transmitter console 10 via the bus 50 (step S
71). When it is not detected that there is a voice input from the transmitter through the microphone 33 (step S71:
N) waits for this voice input. On the other hand, when this voice input is detected (step S71: Y),
The local variable i is initialized to 1 (step S72).
Then, set the count value C ₁ corresponding to the first timer value T _1, as described above through the bus 50 to the timer 53 (step S73), thereby it starts counting with respect to the timer 53 (step S74) .

Thereafter, the CPU 50 accesses the timer 53 at regular intervals by polling to detect whether or not a timeout has occurred, or if the timer 53 has timed out, the timer 53 notifies the CPU 50 via a dedicated signal line or the like. It is possible to input an interrupt to the CPU 50. In any case, CPU
50 waits for the first time-out of timer value T ₁ of the timer 53 (step S75: N) is the first timeout timer value T ₁ of the timer 53 is notified (Step S75: Y), the local variable The LED corresponding to the value set for i is turned off (step S76). Thereafter, the local variable i is incremented (step S7).
7) It is determined whether or not this i is "9" (step S78). When i in step S78 is not "9" (step S78: N), the first to start counting the timer value T ₁ (step S74) with respect to the timer 53 again returns to step S74.

When i is "9" in step S78 (step S78: Y), it means that all the eight LEDs have been turned off, so that the count value C ₂ corresponding to the _second timer value T ₂ is next calculated. The timer 53 is set via the bus 50 (step S79), and the timer 53 starts counting (step S80).

The CPU 50 accesses the timer 53 at regular intervals by polling to detect whether or not a timeout has occurred, or if the timer 53 has timed out, the timer 53 notifies the CPU 50 to the CPU 50 through a dedicated signal line or the like. , CPU 50 can be interrupted. In any case, CP
U50 waits for a second timeout timer value T ₂ of the timer 53 (step S81: N) is a second timer 53
When timeout of the timer value T ₂ of the is notified (step S81: Y), if the display control is not completed (step S82: N), again returns to step S70, the light the entire LED back, feed Wait for speaker input. On the other hand, when the display control ends (step S8).
2: Y), the process is terminated as it is (end).

By the display control by the CPU 50, all the LEDs are turned on before the transmission of the speaker starts, thereby notifying that the timing is a time when the interference is small. When the talker who viewed this starts transmitting, detecting a voice input through the built-in microphone, and starts time measurement by the first timer value T _1. This is L one by one
This is an LED extinguishing timer that measures the timing at which the ED is extinguished. Each time this way LED off timer reaches a first time T ₁ times out, respectively, LED 4
0 _1, LED40 _2, ···, go off in the order of LED40 _8. The sender sees the LED going off,
It is possible to give an idea of how much time is left for no matter how long the user talks, and to make it possible to transmit the sentence so that sentences are separated before all the LEDs are turned off as much as possible. All LEDs
When is turned off, it indicates to the sender that it is time to cause interference due to the sound output from each loudspeaker. Thus the entire LED is turned off, the next in order to wait for the elapse of the second timer time T ₂ is the talker, not turned a LED to the second timer time T ₂ has elapsed. In other words, this time is based on the experience of the speaker, and in the past, the sentences output from each loudspeaker were spoken with a space between the separated sentences so as not to interfere with each other. This is the time corresponding to the interval between them. When the second timer time T ₂ has elapsed, turns on all LED to signal that a less transmission timing of interference talker. This makes it possible to realize a low-cost loudspeaker without adding a large-capacity expensive memory, and to notify a talker of an optimal timing at which sound from each loudspeaker in an adjacent zone is unlikely to interfere. Can be.

The first and second timer values T ₁ and T ₂ can be arbitrarily changed by adjusting the variable resistor 37. However, when the loudspeaker and the loudspeakers at a plurality of points are installed, a test or the like is performed in advance. Is set to an optimal value by repeating. The first timer value T ₁ in the present embodiment is represented by the following equation
Desirably, the second timer value T ₂ is in units of 00 milliseconds and several seconds.

In this embodiment, the transmitter is notified of the transmission timing by the number of LEDs, but the present invention is not limited to this. For example, it may be displayed as a digital value and displayed so as to count down the remaining time.

[0040]

As described above, according to the first aspect of the present invention, the display means performs the display corresponding to the remaining time according to the time measured by the first time measuring means. The sender can refer to this display and transmit the sound by the loudspeaker at an appropriate timing.
Therefore, an expensive memory is not required, and optimal broadcasting can be performed irrespective of the level of skill of the sender.

According to the second aspect of the present invention, the display corresponding to the remaining time of the first time is performed by using the first and second times, so that the timing to be transmitted and the transmission are transmitted. It becomes possible to accurately notify the talker of the timing that should not be performed. Therefore, an expensive memory is not required, and a more detailed broadcast can be performed irrespective of the skill level of the sender.

Further, according to the third aspect of the present invention, regardless of the level of skill of the sender, the interference of the voice information between adjacent zones is further eliminated, so that even in an emergency such as a disaster, the transmission speed can be calmly maintained. Because it can be broadcast, important information can be accurately communicated to local residents.

Furthermore, according to the invention of claim 4,
By changing the first and second times by the first and second time-measuring time changing means, the interference of the voice information in the adjacent zone is reduced according to the installation status of the loudspeaker and the plurality of loudspeakers, and the flexibility is improved. A certain loudspeaker can be provided.

According to the fifth aspect of the present invention, the display means is made up of a plurality of light emitting diodes, and the number of lights is changed according to the remaining time until the first time. This makes it possible to appropriately notify the sender of the base speech transmission pace, and to provide a more inexpensive loudspeaker.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an outline of a configuration of a loudspeaker according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a display mode of a display device in the embodiment.

FIG. 3 is a block diagram illustrating an outline of a configuration of a control device according to the present embodiment.

FIG. 4 is a flowchart showing an outline of control for setting a timer value in the embodiment.

FIG. 5 is a flowchart showing an outline of display control in the embodiment.

FIG. 6 is a configuration diagram showing a schematic configuration of a conventionally proposed loudspeaker and loudspeakers installed at a plurality of points.

[Explanation of symbols]

30 indicator 31 control device 32 driver 33 microphone 35 the audio amplifier 36 audio amplified signal 37 variable resistor 38 display control unit 40 ₁ ~40 ₈ LED 50 CPU 51 bus 52 memory 53 timer 54 resistor 55 connection points 56 A / D converter

Claims (5)

(57) [Claims] 1. Speech information input means for receiving speech information to be amplified, speech information input discrimination means for discriminating that speech information has been input from the speech information input means, and speech information input discrimination means First timer means for starting clocking when it is determined that the voice information has been input, and clocking a predetermined first time; based on the time counted by the first clock means, 1
Display means for performing display corresponding to the remaining time up to the time. 2. Voice information input means for inputting voice information to be amplified, voice information input determination means for determining that the voice information has been input from the voice information input means, and a first predetermined voice information First time counting means for counting time, second time counting means for starting time counting when the first time counting means times out, and counting a second predetermined time; and the voice information input detecting means First time counting means for starting time counting by the first time counting means when it is determined that the voice information has been input or when the second time counting means times out; Means based on the time measured by the means.
Display means for performing display corresponding to the remaining time up to the time. 3. The method according to claim 2, wherein the first time is a time corresponding to the length of the content of the transmission, and the second time is a time corresponding to an interval to be left in the middle of the transmission. 2
The loudspeaker as described. 4. The loudspeaker according to claim 2, further comprising first and second time-measuring time changing means for changing the first and second times. 5. The display device according to claim 2, wherein said display means includes a plurality of light emitting diodes, and changes the number of light emitting diodes to be turned on in accordance with the remaining time until said first time. Loudspeaker.