JP6317863B2 - Noise masking device - Google Patents

Noise masking device Download PDF

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JP6317863B2
JP6317863B2 JP2014006746A JP2014006746A JP6317863B2 JP 6317863 B2 JP6317863 B2 JP 6317863B2 JP 2014006746 A JP2014006746 A JP 2014006746A JP 2014006746 A JP2014006746 A JP 2014006746A JP 6317863 B2 JP6317863 B2 JP 6317863B2
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vibration
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ventilation duct
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大脇　雅直
雅直 大脇
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Kumagai Gumi Co Ltd
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Description

本発明は、集合住宅の居室内における音環境の向上に関するものである。   The present invention relates to an improvement in sound environment in a living room of an apartment house.

近年、集合住宅においては、サッシ等の開口部の気密性能の向上に伴って居室の遮音性能も向上してきている（例えば、特許文献１，２参照）。
しかし、鉄道沿線に立地する集合住宅では、列車が通過しないときに室内のＡ特性音圧レベルが２０ｄＢ台前半となるため、上階の歩行音や排水音などが気になってしまうといった問題点があった。
上記問題点を解決するためには、壁、床、天井などの厚さや材質、あるいは、構造などを変更して適切な遮音性能を確保する必要があった。 In recent years, in apartment houses, sound insulation performance of living rooms has been improved along with improvement in airtight performance of openings such as sashes (for example, see Patent Documents 1 and 2).
However, in apartment houses located along the railway, the A-weighted sound pressure level in the room is in the lower 20 dB range when the train does not pass. was there.
In order to solve the above problems, it is necessary to change the thickness, material, or structure of walls, floors, ceilings, etc. to ensure appropriate sound insulation performance.

特開２０１２−５２３８７号公報JP 2012-52387 A 特開２０１０−２６５１２７号公報JP 2010-265127 A

しかしながら、既設の集合住宅の壁、床、天井などで適切な遮音性能を確保するためには大規模な追加工事が必要であるといった問題点があった。
そこで、集合住宅の屋上などにマイクロフォンを設置して、集合住宅の周辺で発生する外部音を採取し、この外部音を室内に導入することで、上階の歩行音などをマスキングする方法も考えられるが、外部音には人の話し声などが混入する場合もあるので、導入された外部音が気になってしまうといった問題点がある。 However, there has been a problem that a large-scale additional work is required to ensure appropriate sound insulation performance on the walls, floors, ceilings, etc. of existing apartment houses.
Therefore, a microphone may be installed on the rooftop of an apartment house to collect external sounds generated around the apartment house, and this external sound is introduced into the room to mask the upper floor walking sounds. However, there is a problem that the introduced external sound is worrisome because the external sound may be mixed with the human voice.

本発明は、上記問題点に鑑みてなされたもので、集合住宅の居室内における音環境を向上させるための装置を提供することを目的とする。   This invention is made | formed in view of the said problem, and it aims at providing the apparatus for improving the sound environment in the living room of an apartment house.

本発明は、２４時間換気システムが導入されている集合住宅の居室内に騒音をマスキングするためのマスキング音（振動音）を導入する騒音マスキング装置であって、前記換気システムを構成する換気用ダクトの振動を検出する振動検出手段と、前記集合住宅の居室内に設置されて前記振動検出手段で検出した振動を再生するスピーカーと、前記スピーカーの出力を予め設定したレベルに調整する出力調整器と、を備え、前記振動検出手段が前記換気用ダクトの壁面、もしくは、前記換気用ダクト内に設けられたモータの表面のいずれか一方もしくは両方に取付けられていることを特徴とする。
このような騒音マスキング装置を設けることで、居室内には、居住者がうるささを感じないような適度な音量の振動音を導入することができるので、上階の歩行音や排水音などを効果的にマスキングすることができるとともに、換気用ダクトの振動を確実に検出してスピーカーに送ることができる。
また、振動音は、外部音とは異なり、人の話し声などが混入していないので、外部音を導入した場合に比べて、居室内の音環境を更に向上させることができる。 The present invention relates to a noise masking device for introducing a masking sound (vibration sound) for masking noise into a living room of an apartment house in which a 24-hour ventilation system is introduced, the ventilation duct constituting the ventilation system. a vibration detecting means for detecting vibration of bets, speakers and an output adjuster for adjusting the level set the output of the speaker in advance of reproducing the vibration detected by said vibration detecting means is installed in a room of the apartment The vibration detecting means is attached to either one or both of the wall surface of the ventilation duct and the surface of the motor provided in the ventilation duct .
By providing such a noise masking device, it is possible to introduce vibration sound with an appropriate volume so that the occupant does not feel noisy in the living room. In addition to being able to mask , the vibration of the ventilation duct can be reliably detected and sent to the speaker.
In addition, unlike the external sound, the vibration sound is not mixed with human speech and the like, so that the sound environment in the room can be further improved as compared with the case where the external sound is introduced.

また、本発明は、前記振動検出手段の検出した振動の周波数が予め設定した特定周波数帯域内の周波数である場合には、前記スピーカーの出力を予め設定したレベルよりも大きな、第２のレベルに設定することを特徴とする。
このような構成とすることにより、消防車のサイレンのような特定周波数の振動音については積極的に居室内へ導入することができる。
Further, the present invention, when the frequency of the detected vibration before Symbol vibration detecting means is a frequency in a specific frequency band that is set in advance, a large than the set level the output of the speaker in advance, the second level It is characterized by setting to.
By adopting such a configuration, it is possible to positively introduce vibration sound of a specific frequency such as a fire truck siren into the living room.

なお、前記発明の概要は、本発明の必要な全ての特徴を列挙したものではなく、これらの特徴群のサブコンビネーションもまた、発明となり得る。   The summary of the invention does not list all necessary features of the present invention, and a sub-combination of these feature groups can also be an invention.

本実施の形態に係る騒音マスキング装置の構成を示す図である。It is a figure which shows the structure of the noise masking apparatus which concerns on this Embodiment.

図１は、本実施の形態に係る騒音マスキング装置１０の構成を示す図で、同図において、１１は振動検出手段としての振動ピックアップ、１２は増幅器、１３は出力調整器、１４はスピーカーである。
騒音マスキング装置１０は、２４時間換気システムが導入されている集合住宅１の居室２内に設けられる。本例では、換気ファン３ａと換気用モータ３ｂとを備えた換気手段３を浴室２１の天井部に設置するとともに、換気用ダクト４の排気口５を、共有部分である外廊下２２に面する外壁２３の上部側に設けている。なお、同図において、符号２４はベランダ２５に面するリビングで、符号２６は子供部屋である。なお、浴室２１、リビング２４、及び、子供部屋２６には、それぞれ、外部の空気を導入する給気口６〜９が設けられている。 FIG. 1 is a diagram showing the configuration of a noise masking apparatus 10 according to the present embodiment, in which 11 is a vibration pickup as vibration detecting means, 12 is an amplifier, 13 is an output regulator, and 14 is a speaker. .
The noise masking device 10 is provided in the living room 2 of the apartment house 1 in which a 24-hour ventilation system is introduced. In this example, the ventilation means 3 provided with the ventilation fan 3a and the ventilation motor 3b is installed in the ceiling part of the bathroom 21, and the exhaust port 5 of the ventilation duct 4 faces the outer corridor 22 which is a common part. It is provided on the upper side of the outer wall 23. In the figure, reference numeral 24 denotes a living room facing the veranda 25, and reference numeral 26 denotes a child's room. The bathroom 21, the living room 24, and the child room 26 are respectively provided with air supply ports 6 to 9 for introducing external air.

振動ピックアップ１１は、換気用ダクト４の外壁面に設置されて、換気用ダクト４に伝搬される換気用モータ３ｂの振動音や、換気用ダクト４の排気口５から換気用ダクト４内に進入した風など音圧によって励起される換気用ダクト４の振動を検出する。
増幅器１２は、振動ピックアップ１１で検出した換気用ダクト４の振動音を増幅して出力調整器１３に送る。
出力調整器１３は、振動音出力調整手段１３ａと帯域フィルター１３ｂと特殊音出力調整手段１３ｃとを備える。
振動音出力調整手段１３ａは、スピーカー１４に出力される振動音の出力を一定に調整することで、室内での振動音の音圧レベルが常時３０ｄＢ程度となるように設定する。
帯域フィルター１３ｂは、振動音のなかから、消防車のサイレンのような特定周波数帯域（４００〜８５０Ｈｚ）の振動音を取り出して特殊音出力調整手段１３ｃへ送る。
特殊音出力調整手段１３ｃは、スピーカー１４に出力される特定周波数帯域の振動音の出力を一定に調整する。このとき、特定周波数帯域の振動音の出力レベルをスピーカー１４の出力を振動音出力調整手段１３ａで設定したレベルよりも大きな第２のレベル（室内での音圧レベルが５０ｄＢ程度）に設定することが好ましい。
スピーカー１４は、リビング２４の天井に設置されて、出力調整器１３の振動音出力調整手段１３ａにより所定の音圧レベル（３０ｄＢ程度）になるように調節された振動音と、特殊音出力調整手段１３ｃにより第２の音圧レベル（５０ｄＢ程度）になるように調節された振動音とをリビング２４内に導入する。 The vibration pickup 11 is installed on the outer wall surface of the ventilation duct 4 and enters the ventilation duct 4 from the vibration sound of the ventilation motor 3 b transmitted to the ventilation duct 4 or the exhaust port 5 of the ventilation duct 4. The vibration of the ventilation duct 4 excited by the sound pressure such as the wind is detected.
The amplifier 12 amplifies the vibration sound of the ventilation duct 4 detected by the vibration pickup 11 and sends it to the output regulator 13.
The output adjuster 13 includes vibration sound output adjusting means 13a, a band filter 13b, and special sound output adjusting means 13c.
The vibration sound output adjusting means 13a adjusts the output of the vibration sound output to the speaker 14 to be constant so that the sound pressure level of the vibration sound in the room is always about 30 dB.
The band filter 13b extracts vibration sound in a specific frequency band (400 to 850 Hz) such as a siren of a fire engine from vibration sounds and sends it to the special sound output adjusting means 13c.
The special sound output adjusting means 13c adjusts the output of the vibration sound in the specific frequency band output to the speaker 14 to be constant. At this time, the output level of the vibration sound in the specific frequency band is set to a second level (the sound pressure level in the room is about 50 dB) higher than the level set by the vibration sound output adjusting means 13a. Is preferred.
The speaker 14 is installed on the ceiling of the living room 24, and the vibration sound adjusted to a predetermined sound pressure level (about 30 dB) by the vibration sound output adjusting means 13a of the output adjuster 13 and the special sound output adjusting means. The vibration sound adjusted to the second sound pressure level (about 50 dB) by 13c is introduced into the living room 24.

次に、騒音マスキング装置１０による音環境の向上について説明する。
振動ピックアップ１１により検出され増幅器１２で増幅された換気用ダクト４の振動は、出力調整器１３にて出力調整され、スピーカー１４からリビング２４内に放射される。
スピーカー１４から出力される振動音は、上階の歩行音や排水音などをマスキングするので、リビング２４内が静かな場合に比べて、上記の歩行音や排水音などが気にならなくなる。また、スピーカー１４から出力される振動音は、音圧レベルが常時３０ｄＢ程度と、居住者がうるささを感じないような適度な音量に調整されているので、リビング２４の音環境が大幅に向上する。
また、集合住宅１の周辺で発生する外部音を採取し、この外部音によりマスキングした場合には、人の話し声などが混入するなどして導入された外部音が気になってしまうといった問題点があるが、本例では、換気用ダクト４の振動音によりマスキングしているので、このような問題は起こらない。これは、換気用ダクト４内に人の話し声などが入っても、換気用ダクト４内では人の話し声が減衰されるとともに、換気用ダクト４が人の話し声と同じ周波数で振動しないためである。 Next, improvement of the sound environment by the noise masking device 10 will be described.
The vibration of the ventilation duct 4 detected by the vibration pickup 11 and amplified by the amplifier 12 is adjusted in output by the output regulator 13 and radiated from the speaker 14 into the living room 24.
The vibration sound output from the speaker 14 masks the walking sound and drainage sound on the upper floor, so that the above walking sound and drainage sound are not bothered compared to when the living room 24 is quiet. In addition, the vibration sound output from the speaker 14 is adjusted to an appropriate volume that the occupant does not feel noisy at a sound pressure level of about 30 dB at all times, so the sound environment of the living room 24 is greatly improved. .
In addition, when external sounds generated around the apartment house 1 are sampled and masked by these external sounds, the external sound introduced due to the mixing of human speech etc. However, in this example, since the masking is performed by the vibration sound of the ventilation duct 4, such a problem does not occur. This is because even if a person's speaking voice enters the ventilation duct 4, the person's speaking voice is attenuated in the ventilation duct 4, and the ventilation duct 4 does not vibrate at the same frequency as the person's speaking voice. .

スピーカー１４からは、消防車のサイレンのような特定周波数帯域の音も同時にリビング２４内に放射されるが、スピーカー１４から出力される振動音は、上記のように、音圧レベルが常時３０ｄＢ程度になるように制限しているので、居室内で特定周波数帯域の音を感知することは困難である。
本例では、帯域フィルター１３ｂを設けて特定周波数帯域の音を別個に取出すとともに、特殊音出力調整手段１３ｃにより、スピーカー１４から出力される特定周波数帯域の音の音圧レベルを、他の周波数帯域の音圧レベルよりも高い５０ｄＢ程度に設定しているので、居住者は、消防車のサイレンなどを感知することができる。 From the speaker 14, sound in a specific frequency band such as a fire truck siren is also radiated into the living room 24 at the same time, but the vibration sound output from the speaker 14 always has a sound pressure level of about 30 dB as described above. Therefore, it is difficult to sense sound in a specific frequency band in a living room.
In this example, the band filter 13b is provided to separately extract the sound in the specific frequency band, and the sound pressure level of the sound in the specific frequency band output from the speaker 14 is changed to the other frequency band by the special sound output adjusting unit 13c. Since the sound pressure level is set to about 50 dB higher than the sound pressure level, the resident can sense a fire truck siren and the like.

以上、本発明を実施の形態を用いて説明したが、本発明の技術的範囲は前記実施の形態に記載の範囲には限定されない。前記実施の形態に、多様な変更または改良を加えることが可能であることが当業者にも明らかである。そのような変更または改良を加えた形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲から明らかである。   As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

例えば、前記実施の形態では、振動ピックアップ１１を換気用ダクト４の外壁面に設置したが、換気ファン３ａを回転させる換気用モータ３ｂの表面に取付けてもよいし、換気用ダクト４の外壁面と換気用モータ３ｂの表面の両方に取付けてもよい。
また、前記実施の形態では、スピーカー１４をリビングのみに設けたが、他の部屋にも設けてもよい。
また、前記実施の形態では、振動音出力調整手段１３ａを設けて、所定の音圧レベルを、Ａ特性音圧レベルが３０ｄＢとなるようにしたが、居住者がうるささを感じないような音圧レベルとしては、３０ｄＢ〜４０ｄＢの範囲であれば十分である。また、特定周波数帯域の音の音圧レベルについても、５０ｄＢ〜６０ｄＢの範囲であればよい。 For example, in the above embodiment, the vibration pickup 11 is installed on the outer wall surface of the ventilation duct 4, but it may be attached to the surface of the ventilation motor 3 b that rotates the ventilation fan 3 a, or the outer wall surface of the ventilation duct 4. And may be attached to both surfaces of the ventilation motor 3b.
Moreover, in the said embodiment, although the speaker 14 was provided only in the living room, you may provide in another room.
In the above embodiment, the vibration sound output adjusting means 13a is provided so that the predetermined sound pressure level is set to the A characteristic sound pressure level of 30 dB. However, the sound pressure is such that the resident does not feel noisy. A level in the range of 30 dB to 40 dB is sufficient. Also, the sound pressure level of the sound in the specific frequency band may be in the range of 50 dB to 60 dB.

１ 集合住宅、２ 居室、３ 換気手段、３ａ 換気ファン、３ｂ 換気用モータ、
４ 換気用ダクト、５ 排気口、６〜９ 給気口、
１０ 騒音マスキング装置、１１ 振動ピックアップ、１２ 増幅器、
１３ 出力調整器、１３ａ 振動音出力調整手段、１３ｂ 帯域フィルター、
１３ｃ 特殊音出力調整手段、１４ スピーカー、
２１ 浴室、２２ 外廊下、２３ 外壁、２４ リビング、２５ ベランダ、
２６ 子供部屋。 1 apartment house, 2 living room, 3 ventilation means, 3a ventilation fan, 3b ventilation motor,
4 Ventilation duct, 5 exhaust port, 6-9 air supply port,
10 Noise masking device, 11 Vibration pickup, 12 Amplifier,
13 output regulator, 13a vibration sound output adjusting means, 13b band filter,
13c Special sound output adjustment means, 14 speakers,
21 bathrooms, 22 exterior corridors, 23 exterior walls, 24 living rooms, 25 verandas,
26 Children's room.

Claims (2)

２４時間換気システムが導入されている集合住宅の居室内の騒音をマスキングするためのマスキング音を導入する騒音マスキング装置であって、
前記換気システムを構成する換気用ダクトの振動を検出する振動検出手段と、
前記集合住宅の居室内に設置されて前記振動検出手段で検出した振動を再生するスピーカーと、
前記スピーカーの出力を予め設定したレベルに調整する出力調整装置と、
を備え、
前記振動検出手段が前記換気用ダクトの壁面、もしくは、前記換気用ダクト内に設けられたモータの表面のいずれか一方もしくは両方に取付けられていることを特徴とする騒音マスキング装置。 A noise masking device for introducing a masking sound for masking noise in an apartment room where a 24-hour ventilation system is introduced,
A vibration detecting means for detecting vibration of ventilation duct constituting the ventilation system,
A speaker that is installed in a room of the apartment house and reproduces the vibration detected by the vibration detecting means;
An output adjustment device for adjusting the output of the speaker to a preset level;
Equipped with a,
Wall surface of said vibration detecting means the ventilation duct, or the noise masking device characterized that you have attached to one or both surfaces of the motor provided in the ventilation duct. 前記振動検出手段の検出した振動の周波数が予め設定した特定周波数帯域内の周波数である場合には、前記スピーカーの出力を予め設定したレベルよりも大きな、第２のレベルに設定することを特徴とする請求項１に記載の騒音マスキング装置。 When the vibration frequency detected by the vibration detection means is a frequency within a preset specific frequency band, the output of the speaker is set to a second level that is larger than a preset level. The noise masking device according to claim 1 .
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