JPH1093514A - Outdoor acoustic system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a best loudspeaking environment automatically corresponding to the change in loudspeaking environment in real time by adjusting a loudspeaking sound outputted from each speaker automatically in real time based on a parameter resulting from meteorological conditions sensed in real time by a meteorological sensor. SOLUTION: Meteorological conditions such as the wind direction, wind velocity, atmospheric temperature and weather from a meteorological sensor 5 are given to a correction arithmetic circuit 6 as parameters. Then the correction arithmetic circuit 6 compares the meteorological conditions with the meteorological conditions at system build-up and a corrected value is given to a loudspeaking signal adjustment device 2 and a speaker directivity adjustment device 3. Thus, a loudspeaking signal of each speaker picked up by a microphone 1 is given to the loudspeaking signal adjustment device 2, in which its output, a delay and a phase of the signal are corrected and adjusted in real time depending on the meteorological conditions at that time, and the speaker directivity adjustment device 3 applies correction and adjustment to each directivity of each of speakers 4-1-4-n in real time based on the meteorological conditions at that time and the loudspeaking sound is outputted from each of the speakers 4-1-4-n.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor acoustic system for distributing a loud sound evenly in a necessary loudspeaking area and preventing unnecessary noise from flowing outside the loudspeaking area as much as possible.

[0002]

2. Description of the Related Art In an outdoor baseball stadium, for example, an announcement in the stadium is transmitted to the entire stadium without bias, and outside the stadium, the announcement is directed toward the center around the stadium in order to prevent the announcement from flowing as unnecessary noise. Various improvements have been made to the audio equipment, such as mounting a loudspeaker. Further, in an outdoor acoustic system used for beaches and disaster prevention broadcasting, acoustic facilities are constructed particularly in consideration of the topography and the like.

However, since the sound propagation environment changes depending on various factors, in a conventional outdoor sound system of this type, a control device in which several patterns are stored so that the output sound from each loudspeaker can be adjusted. And the operator selects an output sound suitable for the current environment from the stored patterns.

[0004]

As described above, this type of conventional outdoor acoustic system is provided with a control device in which several patterns are stored in order to enable adjustment of the output sound from each loudspeaker. However, simply adjusting the volume based on the operator's feeling cannot cope with the ever-changing sound propagation environment, creating a dead zone of sound in the necessary loudspeaker area,
There is a problem that loud noise leaks out of the loudspeaker area.

That is, the sound propagation environment (loudspeaking conditions) is determined firstly by the wind speed and wind direction. Since the wind speed and wind direction change in real time, the sound volume adjustment pattern selected by the operator according to the feeling causes these changes. We cannot cope enough. Further, since the sound propagation speed changes as the temperature changes, it is necessary to set the temperature as a parameter in order to set a good sounding environment. In addition, it is necessary to set the change of weather such as rain and snow as a parameter, but with the conventional device, it is not possible to set these parameters, and it is not possible for the operator to manually input these parameters with feeling. It is impossible in reality.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an outdoor sound system capable of automatically realizing the best loudspeaker environment in response to a loudspeaker environment that changes in real time. I have.

[0007]

In the outdoor sound system of the present invention, a plurality of loudspeakers are installed at least separately in at least a loudspeaker area, and a necessary and sufficient loudspeaker is uniformly supplied to the loudspeaker area. A weather sensor is provided in an outdoor acoustic system in which a system is constructed so as to minimize the leakage of the loudspeaker outside the loudspeaker area, and a weather condition detected in real time by the weather sensor is used as a parameter from each loudspeaker. A means for automatically adjusting the output loudspeaker sound in real time is provided.

[0008] The weather conditions as the above parameters are:
It is one or more of wind direction, wind speed, temperature, and weather. Further, the adjustment of the loudspeaker output from each loudspeaker which is automatically adjusted in real time is an adjustment of one or more of volume, delay, phase, and directional characteristics of the loudspeaker.

Therefore, the outdoor sound system of the present invention corrects the volume, delay, phase, and directional characteristics of the loudspeaker output from each loudspeaker in accordance with the change in the loudspeaker environment due to a change in weather conditions. In addition, it is possible to maintain a preset best sound environment.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the device configuration of the outdoor acoustic system of the present invention. In the figure, reference numeral 1 denotes a microphone, 2 denotes a loudspeaker signal adjustment device, 3 denotes a speaker directional characteristic adjustment device, and 4-1 to 4-4. -N indicates a speaker, 5 indicates a weather sensor, 6 indicates a correction value calculation circuit, and 7 indicates a monitor.

This kind of outdoor acoustic system has various sound field conditions depending on the purpose and place to be constructed.
Therefore, in the place where it was actually built, under certain weather conditions,
The number, arrangement, direction, and directivity of the loudspeakers 4-1 to 4-n are adjusted, and the above-described best loudspeaker environment (that is, a necessary and sufficient loudspeaker is supplied evenly in the loudspeaker area, and the loudspeaker is outside the loudspeaker area Is set to minimize the leakage of loudspeakers).
This setting is set by simulation at the system design stage.

When the system is in operation, weather conditions such as wind direction, wind speed, temperature, and weather are input from the weather sensor 5 to the correction value calculation unit 6 as parameters, and the correction value calculation unit 6 compares the weather conditions with the weather conditions when the system was constructed. , The correction value is input to the loudspeaker signal adjustment device 2 and the speaker directional characteristic adjustment device 3. Therefore, the loudspeaker signal input from the microphone 1 is adjusted by a loudspeaker signal adjuster for each speaker, and its output (volume), delay, and phase are corrected and adjusted in real time under the weather conditions at that time. The directional characteristics of each of the speakers 4-1 to 4-n are corrected and adjusted in real time under the weather conditions at that time, and the
Loud sound is output from 1 to 4-n. As a result, even when the weather conditions change variously, the best loudspeaker environment can be maintained. Note that the correction value set in the correction value calculation circuit 6 includes, for example, a change in sound speed due to a change in temperature or a change in wind speed.
There are correction values that can be calculated in advance by calculation, and correction values that are actually monitored or calculated by simulation, such as changes in the sound field due to changes in wind direction or weather.

As described above, the outdoor sound system according to the present invention comprises:
The loudspeaker output from each loudspeaker is corrected at the stage of the loudspeaker signal using the weather conditions (wind direction, wind speed, temperature, weather) detected by the weather sensor in real time as parameters (by adjusting the volume, delay, and phase). The change due to weather conditions is corrected), and the correction is made even at the stage of the directional characteristics of the loudspeaker, so that the loudspeaker is automatically adapted to the weather conditions at that time, so that the best loudspeaker environment can be maintained at any time.

The parameters of the weather conditions that require correction differ depending on where the system is constructed. For example, in outdoor sports facilities such as a track and field stadium, a soccer field, and a baseball field, wind (wind direction, wind speed) and temperature are mainly parameters. In parks and wide-area public areas, mainly wind and weather, in ski resorts mainly wind and snow conditions, in beaches, in addition to topography such as the sea, mainly wind, temperature and weather conditions, in disaster prevention broadcasting In addition to terrain, wind and weather are parameters. Therefore, which of these parameters is to be used is appropriately selected according to its construction location and purpose.
Further, in the embodiment shown in FIG. 1, one weather sensor is configured, but a plurality of weather sensors may be installed in the loudspeaking area to more precisely measure the wind direction, the wind speed, and the like.

[0015]

As described above, the outdoor acoustic system of the present invention is provided with a weather sensor, and automatically adjusts the loudspeaker sound output from each loudspeaker in real time using the weather condition detected by the weather sensor in real time as a parameter. Therefore, there is an effect that the loudspeaker state is corrected in real time in accordance with weather conditions, and the best loudspeaker environment can always be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus configuration of an outdoor acoustic system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microphone 2 Loudspeaker signal adjustment device 3 Speaker directivity adjustment device 4-1 to 4-n Speaker 5 Weather sensor 6 Correction value calculation circuit 7 Monitor

Claims (3)

[Claims] At least a plurality of loudspeakers are installed at least in a loudspeaker area, and a necessary and sufficient loudspeaker is supplied without bias in the loudspeaker area. In an outdoor acoustic system in which a system is constructed to reduce noise, a weather sensor is provided, and a means for automatically adjusting in real time a loudspeaker output from each loudspeaker as a parameter based on a weather condition detected in real time by the weather sensor. An outdoor acoustic system comprising: 2. The outdoor acoustic system according to claim 1, wherein the weather condition as the parameter is one or more of wind direction, wind speed, temperature, and weather. 3. The loudspeaker output from each loudspeaker which is automatically adjusted in real time is an adjustment of one or more of volume, delay, phase, and directional characteristics of the loudspeaker. The outdoor acoustic system according to claim 1.