JP2002221969A - Reverberation suppression method and studio utilizing this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reverberation suppression method which is capable of easily suppressing the excessive reverberation of a low-frequency region and suppressing the reverberation without spoiling the beauty of space and a studio utilizing this method. SOLUTION: The reverberation suppression method of suppressing the reverberation of the prescribed space comprises suppressing the reverberation of the prescribed space by installing >=1 balloons 1a to 1h filled with gas in the prescribed space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a reverberation suppressing method and a studio using the method, and more particularly to a reverberation suppressing method for suppressing reverberation in a low frequency region and a studio using the method.

[0002]

2. Description of the Related Art For example, in a broadcasting station, an entrance lobby, an event hall and the like are sometimes used as a public studio for information programs. If such an entrance lobby or event hall is a large space having a high ceiling, the reverberation time will be long. As the reverberation time gets longer,
For example, the reverberation of the reproduced sound from the loudspeaker deteriorates the clarity of the voice, and makes it difficult to hear the voice of the recorded interview or the like. The reverberation also reduces the howling margin. Therefore, when an entrance lobby, an event hall, or the like is used as a public studio for an information program, it is necessary to suppress reverberation.

Conventional methods for suppressing reverberation include a method using an architectural sound absorbing material and a method using electrical treatment. The method using building sound-absorbing material is to attach a sound-absorbing material such as a porous material with many fine holes to the wall and ceiling during construction, and to design the interior in consideration of the effects from the indoor design stage. consider. Further, the method based on the electrical processing is a method in which the sound is electrically absorbed by, for example, an inverse filter processing, and is intended for a specific sound receiving area.

[0004]

However, the conventional method of suppressing reverberation using a sound absorbing material in a building requires designing and studying the interior in consideration of the effect from the indoor design stage.
There was a problem that renovation was required to suppress the reverberation of the existing building. In particular, it is basically impossible to suppress reverberation in a low-frequency region (for example, 500 Hz or less) that causes deterioration of voice clarity in a large space having a high ceiling such as an entrance lobby or an event hall. It was possible and required extensive renovation work.

Further, the conventional method of suppressing reverberation by electrical processing is intended for a specific sound receiving area, and it is difficult to suppress reverberation in a large space having a high ceiling such as an entrance lobby or an event hall. There was a problem that is. Therefore, for example, it is necessary to suppress the reverberation by adjusting the frequency characteristics and the reproduction level of the reproduced sound from the loudspeaker.

As described above, the existing entrance lobby,
When utilizing a large space having a high ceiling, such as an event hall, as a public studio or an event venue, a method for simply suppressing reverberation in a low-frequency region has been demanded.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is capable of easily suppressing excessive reverberation in a low frequency region and suppressing reverberation without deteriorating the beauty of space. It is an object to provide a method and a studio using the method.

[0008]

In order to solve the above-mentioned problems, the present invention relates to a reverberation suppressing method for suppressing reverberation in a predetermined space, wherein one or more balloons filled with gas are installed in the predetermined space. To suppress reverberation in the predetermined space.

In such a reverberation suppressing method, reverberation in a predetermined space can be suppressed only by installing a balloon filled with gas, so that reverberation in a predetermined space can be easily performed without performing a large-scale renovation work. Can be suppressed. Therefore, it is possible to easily suppress reverberation in a space having a high ceiling such as an entrance lobby or an event hall.

In addition, since reverberation can be suppressed without impairing the beauty of a predetermined space by using balloons of various sizes and colors, reverberation can be suppressed without impairing recording, events, and the audience's psychology. It is possible to do. As described above, it becomes extremely easy to utilize a large space having a high ceiling, such as an existing entrance lobby or event hall, as a public studio or event venue.

[0011] The present invention also provides that the balloon installed in the predetermined space selects a size of the balloon according to a desired amount of reverberation suppression, and fills the balloon according to the desired amount of reverberation suppression. It is characterized in that the type of gas to be used is selected.

In such a reverberation suppressing method, it is possible to finely adjust the amount of reverberation depending on the type and size of the gas filled in the balloon.

Further, the present invention is characterized in that the gas filling the balloon is helium gas.

In such a reverberation suppressing method, the reverberation time can be efficiently reduced by using helium gas as the type of gas filled in the balloon. In other words, by using helium gas as the type of gas to be filled in the balloon,
Sound can be efficiently absorbed.

Further, in order to solve the above problems, the present invention provides:
One or more balloons filled with gas are installed,
It is characterized in that reverberation in a room is suppressed in accordance with the balloon.

In such a studio, reverberation can be suppressed only by installing a gas-filled balloon by absorbing sound waves due to the buffering action of the balloon. That is, the reverberation of the studio can be easily suppressed without performing a large-scale renovation work or the like. Therefore, it is possible to easily suppress reverberation in a space having a high ceiling such as an entrance lobby or an event hall.

In addition, by using balloons of various sizes and colors, reverberation can be suppressed without impairing the aesthetics of the studio, so that reverberation can be suppressed without impairing recording, events, and the psychology of the audience. It becomes possible. As described above, it is extremely easy to utilize a space having a high ceiling, such as an existing entrance lobby or event hall, as a studio.

Further, the present invention is characterized in that the balloon suppresses reverberation in a room according to the size and the type of gas filled.

In such a studio, it is possible to finely adjust the amount of reverberation depending on the type and size of the gas charged into the balloon.

Further, the present invention is characterized in that the gas filled in the balloon is helium gas.

In such a studio, the reverberation time can be efficiently reduced by using helium gas as the gas to be charged into the balloon. That is, by using helium gas as the type of gas filled in the balloon, sound can be efficiently absorbed.

[0022]

Next, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an example in which the reverberation suppression method of the present invention is applied to an entrance lobby will be described. However, the present invention can be applied to various spaces where reverberation needs to be suppressed, such as other event halls and studios.

FIG. 1 is a cross-sectional view of one embodiment of an entrance lobby utilizing the reverberation suppression method of the present invention. In addition,
FIG. 1A is an upper sectional view of the entrance lobby as viewed from above. FIG. 1B is a longitudinal sectional view of the entrance lobby viewed from the lateral direction.

In the entrance lobby of FIG. 1, eight balloons 1a to 1g filled with a gas (for example, helium gas) are provided.
1h is installed. The balloons 1a to 1h are, for example, floating at a height of 5.5 m from the floor. Balloon 1
Since the colors of a to 1h can be appropriately selected, the appearance of the entrance lobby is not spoiled. The balloons 1a to 1h can be used by selecting the type and size of the gas to be filled.

The entrance lobby of FIG. 1 includes a sound source 2, a sound receiving point 3, and a stage 4. The sound source 2 is composed of, for example, a loud speaker, and reproduces a voice of an interview or the like. The sound receiving point 3 is constituted by, for example, a microphone or the like, and receives a reproduced sound from the sound source 2.

As shown in FIG. 1, in the entrance lobby where the balloons 1a to 1h are installed, a sound absorbing effect is obtained by the balloons 1a to 1h. This is an effect caused by the sound wave buffering action of the balloon. Therefore, in the entrance lobby in which the balloons 1a to 1h are installed, a low-frequency region (for example, 1 kHz
z or less) can be suppressed.

Hereinafter, the difference in the amount of reverberation suppression according to the size of the balloon and the type of gas filled in the balloon will be sequentially described. 2 and 3, the reverberation time can be measured by pink noise or the like. FIG.
FIG. 4 is a diagram illustrating an example of a difference in the amount of reverberation suppression depending on the size of a balloon.

In FIG. 2, “○” represents the reverberation time for each frequency in an empty state of the reverberation room where no balloon is installed in the reverberation room. “■” represents the reverberation time for each frequency when a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber. “△” indicates the reverberation time for each frequency in a state where a 2.5 m diameter balloon filled with helium gas is installed in the reverberation chamber.

As shown in FIG. 2, when a 1.6 m or 2.5 m diameter balloon filled with helium gas is installed in the reverberation chamber, the reverberation chamber is empty with no balloon installed in the reverberation chamber. In comparison, low-mid range (for example, 1
It can be seen that the reverberation time (25 Hz to 1 kHz) is reduced. In addition, in the state where a 2.5 m diameter balloon filled with helium gas is installed in the reverberation chamber, compared with the state where a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber, the low range to the middle range are provided. It can be seen that the reverberation time is reduced.

Therefore, when the reverberation chamber is filled with a helium gas-filled balloon having a diameter of 1.6 m or 2.5 m, the bass range from the mid-range to the mid-range range is lower than when the reverberation room is empty. For example, 125 Hz to 1 k
Hz). In addition, in the state where a 2.5 m diameter balloon filled with helium gas is installed in the reverberation chamber, compared with the state where a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber, the low range to the middle range are provided. It can be seen that a lot of sound is absorbed.

FIG. 3 is a diagram for explaining an example of the difference in the amount of reverberation depending on the gas filling the balloon. FIG.
In the figure, “○” represents the reverberation time for each frequency in an empty state of the reverberation room where no balloon is installed in the reverberation room. "■"
The reverberation time in a state where a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber is shown for each frequency. "△" indicates a diameter of 1.
The reverberation time when a 6 m balloon is installed is shown for each frequency.

As shown in FIG. 3, when a 1.6 m diameter balloon filled with helium gas or air is installed in a reverberation chamber, the reverberation chamber is not installed in the reverberation chamber. Low-mid range (for example, 125
It can be seen that the reverberation time (Hz to 1 kHz) is reduced. Also, in the state where a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber, compared with the state where a 1.6 m diameter balloon filled with air is installed in the reverberation chamber, the bass range from the mid-range to the mid range is improved. It can be seen that the reverberation time has been reduced. That is, the balloon filled with air does not reduce the reverberation time in the low range as much as the balloon filled with helium gas, but reduces the reverberation time in the low range to the middle range as compared with the empty state of the reverberation room.

Therefore, in a state in which a 1.6 m diameter balloon filled with air is installed in the reverberation chamber, the reverberation is not as large as a state in which a 1.6 m diameter balloon filled with helium gas is installed in the reverberation chamber. It can be seen that more sound is absorbed in the low frequency range to the middle frequency range than when the reverberation room is empty in which no balloon is installed in the room.

FIG. 4 is a diagram for explaining an example of the difference in the amount of reverberation at the entrance lobby depending on the presence or absence of a balloon. In FIG. 4, the reverberation time can be measured by band noise or the like.

In FIG. 4, "O" represents the reverberation time for each frequency when no balloon is installed in the entrance lobby. “■” represents, for example, about 2000 as shown in FIG.
The balloon 1a~1h the entrance lobby diameter helium gas is filled in 2.5m of m ³ represents a reverberation time of a state in which floated from the floor to a height of 5.5m for each frequency.

As shown in FIG. 4, in the state where the balloons 1a to 1h are installed in the entrance lobby, the reverberation time in the low range to the middle range is reduced as compared with the case where the balloon is not installed in the entrance lobby. I understand.
More specifically, the reverberation time is 125 Hz to 500 Hz when no balloon is installed in the entrance lobby.
Is about 2.0 to 2.2 seconds, while the reverberation time is reduced by about 0.4 seconds when the balloons 1a to 1h are installed in the entrance lobby.

Accordingly, it can be seen that when the entrance lobby is equipped with a helium gas-filled balloon having a diameter of 2.5 m, more bass to midrange sound is absorbed than when the balloon is not installed in the entrance lobby. As a result, the howling margin of the entrance lobby increases by about 6 to 8 dB.

In a large space having a high ceiling, such as an entrance lobby or an event hall, reverberation in a low frequency region (for example, 500 Hz or less) which causes deterioration of voice clarity can be suppressed. Etc. does not become difficult to hear.

As described above, the reverberation suppressing method of the present invention and the entrance lobby as a studio using the method do not require large-scale renovation work or the like by merely filling the balloon with gas, and reduce the reverberation in the low frequency region. It is possible to simply suppress it. Further, the reverberation suppression method of the present invention and the entrance hall as a studio using the method can adjust the amount of reverberation depending on the type and size of gas charged into the balloon.

Further, by using balloons of various sizes and colors, reverberation can be suppressed without impairing the appearance of the entrance lobby. Even if a balloon is installed in the entrance lobby, it is difficult to visually recognize that the balloon has an effect for suppressing reverberation, and does not impair the recording, the event, and the psychology of the audience.

In this embodiment, the reverberation is suppressed by using only the balloon. However, a further effect can be obtained by further suppressing the reverberation caused by the cloth. Whether to suppress reverberation by using only the balloon or to suppress reverberation by using the balloon and the cloth may be appropriately selected.

[0042]

As described above, according to the present invention, reverberation in a predetermined space can be suppressed only by installing a balloon filled with gas, so that a predetermined space can be suppressed without performing a large-scale repair work. Reverberation can be easily suppressed.
Therefore, it is possible to easily suppress reverberation in a space having a high ceiling such as an entrance lobby or an event hall.

Also, by using balloons of various sizes and colors, reverberation can be suppressed without impairing the aesthetics of the predetermined space, so that reverberation is suppressed without impairing recording, events, and the audience's psychology. It is possible to do. As described above, it becomes extremely easy to utilize a large space having a high ceiling, such as an existing entrance lobby or event hall, as a public studio or event venue.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of an entrance lobby using the reverberation suppression method of the present invention.

FIG. 2 is a diagram illustrating an example of a difference in a reverberation suppression amount depending on a size of a balloon.

FIG. 3 is a diagram illustrating an example of a difference in the amount of reverberation caused by gas filling a balloon.

FIG. 4 is a diagram illustrating an example of a difference in the amount of reverberation suppression at an entrance lobby depending on the presence or absence of a balloon.

[Explanation of symbols]

 1a-1h Balloon 2 Sound source 3 Receiving point 4 Stage

Continued on the front page (72) Inventor Settsu Komiyama 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Japan Broadcasting Research Institute (72) Inventor Toshio Wakatsuki 2-2-1 Jinnan, Shibuya-ku, Tokyo Japan Inside the Broadcasting Corporation Broadcasting Center (72) Inventor Yoshiyuki Murayama 1-1-10 Ropponmatsu, Chuo-ku, Fukuoka City, Fukuoka Japan Broadcasting Corporation Fukuoka Broadcasting Station F-term (reference) 2E001 DF15 FA41 GA09 HE06 KA05 5D061 AA31 CC20

Claims (6)

[Claims] 1. A reverberation suppression method for suppressing reverberation in a predetermined space, comprising: installing one or more balloons filled with gas in the predetermined space to suppress reverberation in the predetermined space. . 2. The type of gas to be charged into the balloon according to the desired amount of reverberation, wherein the size of the balloon is selected according to a desired amount of reverberation. 2. The reverberation suppression method according to claim 1, wherein: 3. The reverberation suppression method according to claim 1, wherein the gas filled in the balloon is helium gas. 4. A studio, wherein one or more balloons filled with gas are provided, and reverberation in a room is suppressed according to the balloon. 5. The studio according to claim 4, wherein the balloon suppresses reverberation in the room according to the size and the type of gas filled. 6. The studio according to claim 4, wherein the gas filled in the balloon is helium gas.