JPH0666625A - Method and apparatus for measuring sound quality of noise, and method and apparatus for controlling sound quality of operational sound of machine - Google Patents
Method and apparatus for measuring sound quality of noise, and method and apparatus for controlling sound quality of operational sound of machineInfo
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- JPH0666625A JPH0666625A JP21768092A JP21768092A JPH0666625A JP H0666625 A JPH0666625 A JP H0666625A JP 21768092 A JP21768092 A JP 21768092A JP 21768092 A JP21768092 A JP 21768092A JP H0666625 A JPH0666625 A JP H0666625A
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- sound
- sound quality
- noise
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- quality
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、騒音の音質を計測す
る方法及びその計測装置、並びに機器運転音の音質を制
御する方法及びその制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the sound quality of noise, a measuring apparatus therefor, a method for controlling the sound quality of equipment operating sound, and a control apparatus therefor.
【０００２】[0002]
【従来の技術】一般に、例えば空気調和機の運転音はレ
ベルの大きさの時間的な変動が比較的小さい広帯域周波
数成分の支配的な騒音であり、この種の騒音は従来、騒
音の感覚に近付けるためのいわゆるＡ特性を持った周波
数補正回路を用いるｄＢ（Ａ）と呼ばれる評価方法によ
り騒音レベルの大きさが評価されている。2. Description of the Related Art Generally, for example, an operating noise of an air conditioner is a dominant noise of a wide band frequency component having a relatively small level level variation with time. The magnitude of the noise level is evaluated by an evaluation method called dB (A) that uses a frequency correction circuit having a so-called A characteristic for approaching.
【０００３】ところが、この評価に基づいて空気調和機
等の運転音の低騒音化がある程度進められた今日では、
同じ運転音の大きさでも聴感上、不快感を与える場合が
問題となってきている。これは運転音の音質が原因であ
り、例えば運転音レベルは小さくても送風ファンの送風
音等の高周波域の騒音が耳についたり、大きさの時間的
な変動が生じたりしているためであると考えられる。従
って、このような問題に対処するために、機器の運転音
等の騒音の音質を評価することが必要とされる。However, based on this evaluation, the operation noise of an air conditioner or the like has been reduced to some extent today,
There is a problem in that even if the driving noise is the same, the listener feels uncomfortable. This is due to the sound quality of the driving sound.For example, even if the driving sound level is low, noise in the high frequency range, such as the blowing sound of a blower fan, may be audible to the ear, or the size may fluctuate over time. It is believed that there is. Therefore, in order to deal with such a problem, it is necessary to evaluate the sound quality of noise such as the driving sound of the device.
【０００４】このような音質の評価方法として、従来、
例えば日本建築学会環境工学委員会音環境分科会第２６
回音シンポジウム（日本音響学会騒音研究会資料／資料
番号Ｎ−８５０３−３）の第１４頁「空調騒音の評価に
ついて」に示されるように、オクターブバンド中心周波
数に応じて音圧レベルが変化するＲＣ（Room Criterio
n）曲線に基づき、騒音をこのＲＣ曲線と比較すること
で、音質を評価する方法が知られている。As a method of evaluating such sound quality, conventionally,
For example, 26th Meeting of Sound Environment Subcommittee of Environmental Engineering Committee of Architectural Institute of Japan
Sound pressure level changes according to the octave band center frequency, as shown on page 14 "Evaluation of air conditioning noise" in the Consonance Symposium (The Acoustical Society of Japan, Noise Study Material / Material No. N-8503-3). (Room Criterio
n) A method of evaluating sound quality by comparing noise with this RC curve based on a curve is known.
【０００５】[0005]
【発明が解決しようとする課題】しかし、音質は機器に
よって固有の特色があり、上記従来のＲＣ曲線による方
法では、定量的に騒音の音質を評価することはできな
い。このため、聴感上、快適性の高い機器を得るには低
騒音化を進める以外に良好な対策がないのが現状であ
り、機器の開発コストが増大するという問題があった。However, since the sound quality has a characteristic peculiar to each device, it is not possible to quantitatively evaluate the sound quality of noise by the above-mentioned conventional method using the RC curve. For this reason, in order to obtain a device that is highly comfortable in hearing, there is currently no good measure other than the reduction of noise, and there is a problem that the development cost of the device increases.
【０００６】本発明は斯かる点に鑑みてなされたもの
で、その主たる目的は、機器の運転音や騒音の音質をデ
ータベース化して、それに対し実際の音の音質を比較す
るようにすることにより、騒音の音質を定量的に評価で
きるようにすることにある。The present invention has been made in view of the above points, and its main purpose is to make a database of the sound quality of the operating noise and the noise of the equipment and compare the sound quality of the actual sound with that. , It is to be able to quantitatively evaluate the sound quality of noise.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、この発明では、騒音の種類とその音質との関係を
聴感実験に基づいて調べた結果、騒音や運転音を表す多
数の成分があっても、その騒音の音質は２次元の主成分
で殆ど正確に評価でき、しかもこの２次元のマップに、
騒音の物理量から求められる指標をも表し得ることを見
出だし、検出した騒音から求められる上記指標を音質マ
ップと照合して騒音の音質を計算するようにした。In order to achieve the above object, according to the present invention, as a result of investigating the relationship between the type of noise and its sound quality based on a hearing test, a large number of components representing noise and driving sound are obtained. However, the sound quality of the noise can be evaluated almost accurately with the two-dimensional principal component, and this two-dimensional map
It was found that an index obtained from the physical quantity of noise can also be expressed, and the above-mentioned index obtained from the detected noise is collated with a sound quality map to calculate the sound quality of noise.
【０００８】すなわち、図１に示すように、請求項１の
発明では、騒音の音質を計測する方法として、予め、騒
音を表す多数の成分を解析することで、互いに無相関の
関係にある２つの主成分を２次元の座標としかつ騒音の
物理量から求められるラウドネスやシャープネス等の指
標と相関関係のある音質マップをデータベースとして設
けておく。That is, as shown in FIG. 1, according to the invention of claim 1, as a method for measuring the sound quality of noise, a large number of components representing noise are analyzed in advance, so that there is no correlation between them. A sound quality map having two main components as two-dimensional coordinates and having a correlation with indexes such as loudness and sharpness obtained from the physical quantity of noise is provided as a database.
【０００９】そして、実際の騒音を検出して該騒音の上
記指標を計算するとともに、この指標を上記音質マップ
に照合して騒音の音質を計算する。Then, the actual noise is detected, the index of the noise is calculated, and the sound quality of the noise is calculated by collating this index with the sound quality map.
【００１０】請求項２の発明では、騒音の音質を計測す
る装置として、予め、騒音を表す多数の成分を解析する
ことで、互いに無相関の関係にある２つの主成分を２次
元の座標としかつ騒音の物理量から求められる指標と相
関関係のある音質マップをデータベースとして記憶する
記憶手段（１６）と、実際の騒音を検出する騒音検出手
段（７）と、この騒音検出手段（７）で検出された騒音
から上記指標を計算する指標計算手段（１４），（１
５）と、この指標計算手段（１４），（１５）で計算さ
れた指標を上記記憶手段（１６）の音質マップに照合し
て騒音の音質を計算する音質計算手段（１７）とを備え
る。According to a second aspect of the present invention, as a device for measuring the sound quality of noise, by analyzing a large number of components representing noise in advance, two principal components having no correlation with each other are made into two-dimensional coordinates. In addition, a storage means (16) for storing a sound quality map having a correlation with an index obtained from the physical quantity of noise as a database, a noise detection means (7) for detecting actual noise, and the noise detection means (7) for detection. Index calculating means (14), (1) for calculating the index from the generated noise
5) and a sound quality calculation means (17) for calculating the sound quality of noise by collating the indexes calculated by the index calculation means (14) and (15) with the sound quality map of the storage means (16).
【００１１】請求項３の発明では、機器の運転音の音質
を制御する方法として、上記請求項１の発明の騒音の音
質計測方法に基づいて機器の運転音の音質を計算し、こ
の運転音の音質を予め設定されている基準音質と比較し
て両音質の差に基づく補正信号を生成し、この補正信号
をスピーカ（８）に出力して該スピーカ（８）から機器
の運転音との合成音が基準音質になるような補正音を放
射させる。According to a third aspect of the present invention, as a method for controlling the sound quality of the driving sound of the equipment, the sound quality of the driving sound of the equipment is calculated based on the method for measuring the sound quality of noise of the first invention, and the sound quality of the driving sound is calculated. Is compared with a preset reference sound quality to generate a correction signal based on the difference between the two sound qualities, and the correction signal is output to the speaker (8) to be compared with the operation sound of the device from the speaker (8). A correction sound is emitted so that the synthesized sound becomes the reference sound quality.
【００１２】請求項４の発明では、機器の運転音の音質
を制御する装置として、上記請求項２の発明の騒音の音
質計測装置に加え、予め機器の基準となる運転音の音質
を設定する基準音質設定手段（１９）と、運転音検出手
段（７）とは離れた位置に配置されたスピーカ（８）
と、音質計算手段（１７）で計算された運転音の音質を
上記基準音質設定手段（１９）で設定されている基準音
質と比較して両音質の差に基づく補正信号を生成し、こ
の補正信号を上記スピーカ（８）に出力して該スピーカ
（８）から機器の運転音との合成音が基準音質になるよ
うな補正音を放射させる制御手段（２０）とを設ける。According to the invention of claim 4, as a device for controlling the sound quality of the driving sound of the device, in addition to the sound quality measuring device for the noise of the invention of claim 2, the sound quality of the driving sound as a reference of the device is set in advance. A speaker (8) arranged at a position apart from the reference sound quality setting means (19) and the driving sound detection means (7).
And the sound quality of the driving sound calculated by the sound quality calculation means (17) is compared with the reference sound quality set by the reference sound quality setting means (19) to generate a correction signal based on the difference between the two sound quality, and this correction is performed. A control means (20) is provided for outputting a signal to the speaker (8) and radiating a correction sound from the speaker (8) such that a synthesized sound of the driving sound of the device becomes a reference sound quality.
【００１３】請求項５の発明では、上記機器を、送風フ
ァン（６）を備えた空気調和機とする。また、運転音検
出手段（７）は、上記送風ファン（６）の送風音を含む
空気調和機の運転音を検出するものとし、さらに、機器
の運転音の物理量から求められる指標は、音の大きさを
表すラウドネス及び音の金属音性を表すシャープネスと
する。According to a fifth aspect of the invention, the device is an air conditioner equipped with a blower fan (6). Further, the operation sound detecting means (7) detects the operation sound of the air conditioner including the air blowing sound of the blower fan (6), and the index obtained from the physical quantity of the operation sound of the device is Loudness representing loudness and sharpness representing metallic tones of sound.
【００１４】[0014]
【作用】上記の構成により、請求項１又は２の発明で
は、運転音検出手段（７）により実際の騒音が検出され
ると、この騒音の物理量からラウドネスやシャープネス
等の指標が指標計算手段（１４），（１５）で計算さ
れ、この指標は音質計算手段（１７）において記憶手段
（１６）の音質マップと照合される。音質マップは、騒
音を表す多数の成分を解析することで互いに無相関の関
係にある２つの主成分を２次元の座標とするもので、こ
の音質マップは上記ラウドネスやシャープネス等の指標
と相関関係があるので、このマップに上記計算した指標
を照合することで音質を計算でき、このことによって騒
音の音質を定量的に評価することができる。With the above structure, in the invention of claim 1 or 2, when the actual noise is detected by the driving sound detecting means (7), the index of the loudness, sharpness or the like is calculated from the physical quantity of the noise as the index calculating means ( 14) and (15), and this index is compared with the sound quality map of the storage means (16) in the sound quality calculation means (17). The sound quality map uses two principal components that are uncorrelated to each other as two-dimensional coordinates by analyzing a large number of components that represent noise, and this sound quality map correlates with the indexes such as loudness and sharpness. Therefore, the sound quality can be calculated by comparing the calculated index with this map, and the sound quality of noise can be quantitatively evaluated.
【００１５】請求項３又は４の発明では、上記のように
して機器の運転音の音質が計算された後、制御手段（２
０）において上記運転音の音質が予め設定されている基
準音質設定手段（１９）の基準音質と比較されて両音質
の差に基づく補正信号が生成される。この補正信号はス
ピーカ（８）に出力されて該スピーカ（８）から機器の
運転音との合成音が基準音質になるような補正音が放射
される。このため、機器の運転音を能動的に基準音質に
制御することができ、聴感上、快適性の高い機器が得ら
れるとともに、騒音レベルがある程度大きくても聴感上
は問題のない運転音が得られるので、機器に対し必要以
上の低騒音化の要求を満たさずともよく、機器の開発コ
ストを低減することができる。In the invention of claim 3 or 4, after the sound quality of the operating sound of the equipment is calculated as described above, the control means (2
In 0), the sound quality of the driving sound is compared with the reference sound quality of the reference sound quality setting means (19) which is set in advance, and the correction signal based on the difference between the two sound quality is generated. This correction signal is output to the speaker (8), and the correction sound is emitted from the speaker (8) such that the synthesized sound with the operation sound of the device becomes the reference sound quality. For this reason, the driving sound of the device can be actively controlled to the reference sound quality, and a device that is highly audible and comfortable can be obtained, and a driving sound that is audible without a problem even if the noise level is high to some extent is obtained. Therefore, it is not necessary to satisfy the demand for noise reduction of the device more than necessary, and the development cost of the device can be reduced.
【００１６】請求項５の発明では、機器としての空気調
和機の運転音を表す指標としてラウドネス及びシャープ
ネスが好適であるので、送風ファン（６）の送風音を含
む空気調和機の運転音の音質を聴感上、不快感がなくて
快適なものとすることができる。In the fifth aspect of the invention, since loudness and sharpness are suitable as indexes for indicating the operating sound of the air conditioner as a device, the sound quality of the operating sound of the air conditioner including the blowing sound of the blower fan (6) is preferable. Can be made comfortable without any discomfort.
【００１７】[0017]
【実施例】以下、本発明の実施例を図２以下の図面に基
づいて説明する。図５及び図６は本発明の実施例に係る
空気調和機（Ａ）を示し、この空気調和機（Ａ）は室内
機を構成するもので、左右方向に長い矩形箱状のケーシ
ング（１）を有し、このケーシング（１）の前面上部に
は空気吸込口（２）が、また前側下端角部には空気吹出
口（３）がそれぞれ開口されている。ケーシング（１）
内には上記空気吸込口（２）及び空気吹出口（３）を連
通する空気流路（４）が形成され、該空気流路（４）の
空気吸込口（２）側には空気を熱交換して冷却又は加熱
する熱交換器（５）が、また空気吹出口（３）側には水
平方向の回転軸心を有するクロスフローファン（６）が
それぞれ配設されており、ファン（６）の作動により空
気吸込口（２）からケーシング（１）内の空気流路
（４）に室内の空気を吸い込み、この吸入空気を熱交換
器（５）で冷却又は加熱した後、空気吹出口（３）から
室内に吹き出すようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings starting from FIG. 5 and 6 show an air conditioner (A) according to an embodiment of the present invention. The air conditioner (A) constitutes an indoor unit and has a rectangular box-shaped casing (1) long in the left-right direction. The casing (1) is provided with an air inlet (2) at the upper front portion and an air outlet (3) at the front lower corner. Casing (1)
An air flow path (4) communicating with the air suction port (2) and the air blowout port (3) is formed in the air flow path (4), and air is heated on the air suction port (2) side of the air flow path (4). A heat exchanger (5) for exchanging and cooling or heating, and a cross flow fan (6) having a horizontal axis of rotation on the side of the air outlet (3) are arranged. ), The indoor air is sucked into the air flow path (4) in the casing (1) from the air suction port (2), and the sucked air is cooled or heated by the heat exchanger (5), and then the air outlet. It is designed to blow out into the room from (3).
【００１８】上記空気吹出口（３）上側の壁部において
左右中央部には、上記クロスフローファン（６）の送風
音を含む空気調和機（Ａ）の運転音を検出する運転音検
出手段（騒音検出手段）としてのマイクロフォン（７）
が取り付けられている。一方、空気吹出口（３）の左右
壁部、つまり上記マイクロフォン（７）とは離れた位置
にはそれぞれ１つずつのスピーカ（８），（８）が空気
吹出口（３）の左右中央部に向くように取り付けられて
いる。In the left and right central portions of the wall portion on the upper side of the air outlet (3), a driving sound detecting means for detecting a driving sound of the air conditioner (A) including a blowing sound of the cross flow fan (6) ( Microphone (7) as noise detection means
Is attached. On the other hand, at the left and right wall portions of the air outlet (3), that is, at positions apart from the microphone (7), one speaker (8) and one speaker (8) are provided at the left and right center portions of the air outlet (3). It is attached to face.
【００１９】図３に示すように、上記マイクロフォン
（７）の出力信号はスピーカ（８），（８）の放射音を
制御するためのコントローラ（１１）に入力されてい
る。このコントローラ（１１）には、マイクロフォン
（７）からの出力信号を増幅するマイクアンプ（１２）
と、該マイクアンプ（１２）から出力された運転音の１
／３オクターブ毎の音圧レベルを計算する１／３オクタ
ーブ音圧レベル計算回路（１３）と、この計算回路（１
３）の出力信号から音の大きさを表す指標としてのラウ
ドネスを計算するラウドネス計算回路（１４）（指標計
算手段）と、同様に音の金属音性を表す指標であるシャ
ープネスを計算するシャープネス計算回路（１５）（指
標計算手段）と、予め設定された音質マップをデータベ
ースとして記憶する記憶部（１６）と、上記ラウドネス
計算回路（１４）及びシャープネス計算回路（１５）で
それぞれ計算されたラウドネス及びシャープネスの各指
標を上記記憶部（１６）の音質マップに照合して運転音
の音質を計算する音質計算回路（１７）とが設けられ、
この音質計算回路（１７）の出力信号は、同計算回路
（１７）で計算された運転音の音質を表示する表示器
（１８）に接続されている。以上の機器（１２）〜（１
７）で、騒音としての空気調和機（Ａ）の運転音の音質
を計測するようにした音質計測装置（２２）が構成され
ている。As shown in FIG. 3, the output signal of the microphone (7) is input to the controller (11) for controlling the radiated sound of the speakers (8) and (8). The controller (11) includes a microphone amplifier (12) for amplifying an output signal from the microphone (7).
And one of the driving sounds output from the microphone amplifier (12)
1/3 octave sound pressure level calculation circuit (13) for calculating the sound pressure level for each / 3 octave, and this calculation circuit (1
A loudness calculation circuit (14) (index calculation means) for calculating loudness as an index representing the loudness of the sound from the output signal of 3), and a sharpness calculation for similarly calculating sharpness which is an index representing the metallic tone of the sound. A circuit (15) (index calculation means), a storage section (16) that stores a preset sound quality map as a database, and the loudness and the loudness calculated by the loudness calculation circuit (14) and the sharpness calculation circuit (15), respectively. A sound quality calculation circuit (17) for calculating the sound quality of the driving sound by comparing each sharpness index with the sound quality map of the storage unit (16) is provided,
The output signal of the sound quality calculation circuit (17) is connected to the indicator (18) for displaying the sound quality of the driving sound calculated by the calculation circuit (17). The above devices (12) to (1
In 7), the sound quality measuring device (22) is configured to measure the sound quality of the driving sound of the air conditioner (A) as noise.
【００２０】また、コントローラ（１１）には、空気調
和機（Ａ）の予め基準となる運転音の音質を設定する基
準音質設定部（１９）と、上記音質計算回路（１７）で
計算された運転音の音質を上記基準音質設定部（１９）
で設定されている基準音質と比較して両音質の差に基づ
く補正信号を生成し、この補正信号を上記各スピーカ
（８）に出力して、該スピーカ（８）から空気調和機
（Ａ）の運転音との合成音が基準音質になるような補正
音を放射させる制御手段としての運転音能動制御回路
（２０）と、この制御回路（２０）からの補正信号を増
幅して各スピーカ（８）を駆動し、スピーカ（８）から
補正音を放射させる出力アンプ（２１）とが設けられて
いる。上記スピーカ（８）、音質計測装置（２２）、基
準音質設定部（１９）、運転音能動制御回路（２０）及
びアンプ（２１）で、空気調和機（Ａ）の運転音の音質
を能動制御するようにした運転音制御装置（２３）が構
成されている。Further, the controller (11) is calculated by a reference sound quality setting section (19) for setting the sound quality of a reference driving sound of the air conditioner (A) and the sound quality calculation circuit (17). The sound quality of the driving sound is set to the reference sound quality setting section (19).
The correction signal based on the difference between the two sound qualities compared with the reference sound quality set in 1. is output to each of the speakers (8), and the air conditioner (A) is output from the speakers (8). Driving sound active control circuit (20) as a control means for radiating a correction sound such that a synthesized sound with the driving sound of the reference sound quality becomes a reference sound quality, and a correction signal from this control circuit (20) is amplified and each speaker ( 8) and an output amplifier (21) for driving the speaker (8) to emit a correction sound. The speaker (8), the sound quality measuring device (22), the reference sound quality setting unit (19), the driving sound active control circuit (20) and the amplifier (21) actively control the sound quality of the driving sound of the air conditioner (A). The driving sound control device (23) configured to do so is configured.
【００２１】上記記憶部（１６）で記憶されている音質
マップは、図４に示すように、空気調和機（Ａ）の運転
音を表す多数の成分を解析することで、互いに無相関の
関係にある２つの主成分１，２を２次元の座標としかつ
運転音の物理量から求められる上記ラウドネス及びシャ
ープネスの各指標と相関関係のあるものである。As shown in FIG. 4, the sound quality map stored in the storage unit (16) has a non-correlated relationship with each other by analyzing a large number of components representing the operation sound of the air conditioner (A). The two main components 1 and 2 in 2 are used as two-dimensional coordinates and have a correlation with the respective indexes of the loudness and sharpness obtained from the physical quantity of the driving sound.
【００２２】また、上記基準音質は、例えば暗騒音とし
たときに聴感上好ましい音質であり、基準音質設定部
（１９）は、この基準音質を音波形のスペクトルデータ
ベースとして予め記憶している。Further, the reference sound quality is a sound quality that is preferable for the sense of hearing when it is assumed to be background noise, and the reference sound quality setting section (19) stores this reference sound quality in advance as a sound wave spectrum database.
【００２３】上記コントローラ（１１）で行われる信号
処理動作は図２に示すとおりである。まず、ステップＳ
1 でマイクロフォン（７）の出力信号を基に運転音を収
集し、ステップＳ2 で１／３オクターブ音圧レベル計算
回路（１３）により、マイクアンプ（１２）から出力さ
れた運転音の１／３オクターブ毎の音圧レベルを計算す
る。次いで、ステップＳ3 でラウドネス計算回路（１
４）により運転音の大きさを表す指標としてのラウドネ
スを、ステップＳ4 で同様にシャープネス計算回路（１
５）により運転音の金属音性を表す指標であるシャープ
ネスをそれぞれ計算する。この後のステップＳ5 では、
音質計算回路（１７）において上記ラウドネス計算回路
（１４）及びシャープネス計算回路（１５）でそれぞれ
計算されたラウドネス及びシャープネスの各指標を記憶
部（１６）の図４に示す音質マップに照合して運転音の
音質を計算する。このとき、併せて上記計算された運転
音の音質を表示器（１８）で表示する。The signal processing operation performed by the controller (11) is as shown in FIG. First, step S
In 1, the driving sound is collected based on the output signal of the microphone (7), and in step S2, the 1/3 octave sound pressure level calculation circuit (13) outputs 1/3 of the driving sound output from the microphone amplifier (12). Calculate the sound pressure level for each octave. Then, in step S3, the loudness calculation circuit (1
The loudness as an index representing the loudness of the driving sound is determined by the step 4), and the sharpness calculation circuit (1
The sharpness, which is an index representing the metallic tone of the driving sound, is calculated by 5). In step S5 after this,
In the sound quality calculation circuit (17), the loudness and sharpness indexes calculated by the loudness calculation circuit (14) and the sharpness calculation circuit (15) are compared with the sound quality map of the storage unit (16) shown in FIG. Calculate the sound quality. At this time, the sound quality of the calculated driving sound is also displayed on the display unit (18).
【００２４】次いで、ステップＳ6 で、上記音質計算回
路（１７）で計算された運転音の音質を基準音質設定部
（１９）で設定されている基準音質と比較して音質が適
正かどうかを判定し、この判定がＹＥＳのときには最初
のステップＳ1 に戻る。Then, in step S6, the sound quality of the driving sound calculated by the sound quality calculation circuit (17) is compared with the reference sound quality set in the reference sound quality setting section (19) to determine whether the sound quality is appropriate. If the result of this judgment is YES, the process returns to the first step S1.
【００２５】一方、ステップＳ6 で音質の悪いＮＯと判
定されると、ステップＳ7 に進んで運転音能動制御回路
（２０）を作動させ、上記運転音の音質と基準音質設定
部（１９）で設定されている基準音質との差に基づく補
正信号を生成し、この補正信号を上記スピーカ（８），
（８）に出力して、該スピーカ（８），（８）から空気
調和機（Ａ）の運転音との合成音が基準音質になるよう
な補正音を放射させ、しかる後、最初のステップＳ1 に
戻る。On the other hand, if it is determined in step S6 that the sound quality is NO, the process proceeds to step S7 to activate the driving sound active control circuit (20) to set the driving sound quality and the reference sound quality setting section (19). A correction signal is generated based on the difference between the standard sound quality and the standard sound quality, and the correction signal is generated by the speaker
Output to (8), and emit a correction sound from the loudspeakers (8) and (8) so that the synthesized sound with the operation sound of the air conditioner (A) becomes the reference sound quality, and then the first step. Return to S1.
【００２６】次に、以上のように構成された運転音の音
質計測装置（２２）を用いて空気調和機（Ａ）の運転音
の音質を計測する方法、及び運転音制御装置（２３）を
用いて運転音を能動制御する方法について説明する。Next, a method for measuring the sound quality of the driving sound of the air conditioner (A) using the driving sound quality measuring apparatus (22) configured as described above, and a driving sound control apparatus (23). A method of actively controlling the driving sound using the method will be described.
【００２７】まず、空気調和機（Ａ）におけるクロスフ
ローファン（６）の送風音を含む運転音をマイクロフォ
ン（７）で検出して、この検出された運転音の１／３オ
クターブ毎の音圧レベルを１／３オクターブ音圧レベル
計算回路（１３）にて計算する。次いで、この音圧レベ
ルを基に運転音のラウドネス及びシャープネスの各指標
をそれぞれラウドネス計算回路（１４）及びシャープネ
ス計算回路（１５）で計算するとともに、この両指標を
記憶部（１６）の音質マップに照合して運転音の音質を
音質計算回路（１７）にて計算し、その表示を表示器
（１８）で行う。First, the operating sound including the blowing sound of the cross flow fan (6) in the air conditioner (A) is detected by the microphone (7), and the sound pressure of each 1/3 octave of the detected operating sound is detected. The level is calculated by the 1/3 octave sound pressure level calculation circuit (13). Then, based on the sound pressure level, the loudness and sharpness indexes of the driving sound are calculated by the loudness calculation circuit (14) and the sharpness calculation circuit (15), respectively, and both indexes are stored in the sound quality map of the storage unit (16). The sound quality of the driving sound is calculated by the sound quality calculation circuit (17), and the display is displayed on the display (18).
【００２８】運転音を制御するときには、さらに、運転
音能動制御回路（２０）において、上記計算された運転
音の音質を、基準音質設定部（１９）で予め設定されて
いる基準音質と比較して両音質の差に基づく補正信号を
生成し、この補正信号をスピーカ（８），（８）に出力
して該スピーカ（８），（８）から機器の運転音との合
成音が基準音質になるような補正音を放射させる。In controlling the driving sound, the driving sound active control circuit (20) further compares the calculated sound quality of the driving sound with the reference sound quality preset in the reference sound quality setting section (19). Generates a correction signal based on the difference between the two sound qualities, outputs the correction signal to the speakers (8), (8), and the synthesized sound from the speaker (8), (8) and the operation sound of the device is the reference sound quality. Emits a correction sound such that
【００２９】したがって、この実施例においては、空気
調和機（Ａ）の運転時にその運転音がマイクロフォン
（７）により検出され、このマイクロフォン（７）の出
力信号はコントローラ（１１）に入力される。このコン
トローラ（１１）においては、検出された運転音の１／
３オクターブ毎の音圧レベルが１／３オクターブ音圧レ
ベル計算回路（１３）により計算され、次いで、この音
圧レベルを基にラウドネス計算回路（１４）により運転
音のラウドネスの指標が、またシャープネス計算回路
（１５）によりシャープネスの指標がそれぞれ機械的に
計算される。この両指標は音質計算回路（１７）にて記
憶部（１６）の音質マップと照合されて運転音の音質が
計算される。すなわち、上記音質マップは、図４に示す
ように、空気調和機（Ａ）の運転音を表す多数の成分を
解析することで互いに無相関の関係にある２つの主成分
を２次元の座標とするものであり、この音質マップでは
上記ラウドネスやシャープネスの各指標と相関関係があ
るので、このマップに上記計算したラウドネス及びシャ
ープネスを照合することで音質を計算でき、運転音の音
質を定量的に評価することができる。Therefore, in this embodiment, the operation sound of the air conditioner (A) is detected by the microphone (7), and the output signal of the microphone (7) is input to the controller (11). In this controller (11), 1 / of the detected driving noise
The sound pressure level for every 3 octaves is calculated by the 1/3 octave sound pressure level calculation circuit (13), and based on this sound pressure level, the loudness calculation circuit (14) calculates the loudness index of the driving sound and also the sharpness. The sharpness index is mechanically calculated by the calculation circuit (15). Both of these indexes are collated by the sound quality calculation circuit (17) with the sound quality map of the storage section (16) to calculate the sound quality of the driving sound. That is, in the sound quality map, as shown in FIG. 4, by analyzing a large number of components representing the operation sound of the air conditioner (A), two main components that are uncorrelated with each other are converted into two-dimensional coordinates. Since this sound quality map has a correlation with the above-mentioned loudness and sharpness indexes, the sound quality can be calculated by comparing the calculated loudness and sharpness with this map, and the sound quality of the driving sound can be quantitatively determined. Can be evaluated.
【００３０】そして、上記音質計算回路（１７）で計算
された音質は表示器（１８）により表示され、この表示
は、例えば「（音質レベル：８）濁った迫力のある音で
す。」等のように行われる。The sound quality calculated by the sound quality calculation circuit (17) is displayed on the display (18), and this display is, for example, "(sound quality level: 8) muddy and powerful sound." Is done like.
【００３１】また、上記のようにして空気調和機（Ａ）
の運転音の音質が計算された後、音質計算回路（１７）
の出力信号は、基準音質設定部（１９）の出力信号と共
に運転音能動制御回路（２０）に入力される。この運転
音能動制御回路（２０）においては、運転音の平均スペ
クトルに基づき基準音質設定部（１９）に記憶されてい
るスペクトルデータベースの中から基準音質の目標スペ
クトルが設定され、マイクロフォン（７）で検出された
運転音の音質のスペクトルが上記目標スペクトルと比較
されて、両スペクトルの差に基づいた補正信号が生成さ
れ、この補正信号はスピーカ（８），（８）に出力され
て該スピーカ（８），（８）から補正音が放射され、こ
のスピーカ（８），（８）から放射される補正音と空気
調和機（Ａ）の実際の運転音とが合成されて、その合成
音が運転音として生成される。このようにして空気調和
機（Ａ）の運転音を能動的に基準音質に制御することが
できる。このため、空気調和機（Ａ）の実際の運転音に
音質の悪化が生じたときでも、その運転音とスピーカ
（８），（８）からの放射音との合成音は基準音質のス
ペクトルになるように絶えず補正されることになり、音
質のよい所定の基準運転音を暗騒音として定常的に流す
ことができ、聴感上、快適性の高い空気調和機（Ａ）が
得られる。Further, as described above, the air conditioner (A)
Sound quality calculation circuit (17) after the sound quality of the driving sound is calculated
Of the reference sound quality setting section (19) is input to the driving sound active control circuit (20). In the driving sound active control circuit (20), the target spectrum of the reference sound quality is set from the spectrum database stored in the reference sound quality setting unit (19) based on the average spectrum of the driving sound, and the target sound of the microphone (7) is set. The detected sound quality spectrum of the driving sound is compared with the target spectrum to generate a correction signal based on the difference between the two spectra, and the correction signal is output to the speakers (8) and (8) to output the speaker ( 8) and (8) emit a correction sound, and the correction sound emitted from the speakers (8) and (8) and the actual operation sound of the air conditioner (A) are combined, and the combined sound is generated. It is generated as a driving sound. In this way, the operating sound of the air conditioner (A) can be actively controlled to the standard sound quality. Therefore, even when the sound quality of the actual driving sound of the air conditioner (A) deteriorates, the synthesized sound of the driving sound and the radiated sounds from the speakers (8) and (8) is in the spectrum of the reference sound quality. As described above, the air conditioner (A) having a high audibility and a comfortable feeling can be obtained because the predetermined reference driving sound with good sound quality can be constantly flown as the background noise.
【００３２】また、騒音レベルがある程度大きくても聴
感上は問題のない運転音が得られるので、必要以上の低
騒音化が不要となり、空気調和機（Ａ）の開発コストを
低減することができる。Further, even if the noise level is high to some extent, a driving sound that is audibly no problem is obtained, so that it is not necessary to reduce the noise more than necessary, and the development cost of the air conditioner (A) can be reduced. .
【００３３】さらに、上記ラウドネス及びシャープネス
の各指標は、空気調和機（Ａ）の運転音を表す指標とし
て適正であるので、上記空気調和機（Ａ）の運転音の音
質の計測及びその運転音の能動制御を良好に行うことが
できる。Furthermore, since the respective indexes of loudness and sharpness are appropriate as indexes for indicating the operation sound of the air conditioner (A), the sound quality of the operation sound of the air conditioner (A) and the operation sound thereof are measured. The active control of can be performed well.
【００３４】尚、上記実施例では、空気調和機（Ａ）の
運転音の音質を計測し、かつその音質が基準音質になる
ように能動制御する場合を説明したが、本発明は、空気
調和機（Ａ）以外の機器の運転音の音質の計測及びその
能動制御を行う場合についても同様に適用することがで
きる。また、これら機器の運転音に限らず、通常一般の
騒音の音質を計測する場合やその音質を基準音質に能動
制御する場合についても同様である。これらの場合、音
質マップとしては、機器の運転音や騒音を表す多数の成
分を解析することで、互いに無相関の関係にある２つの
主成分を２次元の座標としかつ騒音の物理量から求めら
れる指標と相関関係のあるマップを作ればよい。In the above embodiment, the sound quality of the operating sound of the air conditioner (A) is measured, and active control is performed so that the sound quality becomes the reference sound quality. However, the present invention is not limited to this. The same can be applied to the case of measuring the sound quality of the driving sound of devices other than the machine (A) and performing active control thereof. The same applies not only to the operation sound of these devices but also to the case of measuring the sound quality of normal general noise and the case of actively controlling the sound quality to the reference sound quality. In these cases, the sound quality map can be obtained from the physical quantity of noise by analyzing two components that represent the operating noise and noise of the device to make two principal components that are uncorrelated with each other into two-dimensional coordinates. You can make a map that correlates with the index.
【００３５】[0035]
【発明の効果】以上説明したように、請求項１又は２の
発明によると、予め、騒音を表す多数の成分を解析し
て、互いに無相関の関係にある２つの主成分を２次元の
座標としかつ騒音の物理量から求められるラウドネスや
シャープネス等の指標と相関関係のある音質マップをデ
ータベースとして求めておき、検出した実際の騒音の物
理量からラウドネスやシャープネス等の指標を計算し、
この指標を音質マップと照合して音質を計算するので、
騒音の音質を定量的に評価することができる。As described above, according to the invention of claim 1 or 2, a large number of components representing noise are analyzed in advance, and two main components having no correlation with each other are two-dimensionally coordinated. And a sound quality map that correlates with indexes such as loudness and sharpness obtained from the physical quantity of noise is obtained as a database, and indexes such as loudness and sharpness are calculated from the detected physical quantity of actual noise,
Since this index is compared with the sound quality map to calculate the sound quality,
The sound quality of noise can be quantitatively evaluated.
【００３６】請求項３又は４の発明によれば、上記請求
項１又は２の発明のようにして機器の運転音の音質を計
算し、この運転音の音質を予め設定されている基準音質
と比較して両音質の差に基づく補正信号を生成し、この
補正信号をスピーカに出力してスピーカから機器の運転
音との合成音が基準音質になるような補正音を放射する
ので、機器の運転音を能動的に基準音質に制御すること
ができ、聴感上、快適性の高い機器が得られる。また、
騒音レベルがある程度大きくても聴感上は問題のない運
転音も得られ、必要以上の低騒音化が不要となって機器
の開発コストの低減を図ることができる。According to the invention of claim 3 or 4, as in the invention of claim 1 or 2, the sound quality of the driving sound of the equipment is calculated, and the sound quality of this driving sound is set as a preset reference sound quality. A correction signal based on the difference between the two sound qualities is generated by comparison, the correction signal is output to the speaker, and the speaker emits a correction sound such that the synthesized sound with the operation sound of the device becomes the reference sound quality. The driving sound can be actively controlled to the standard sound quality, and a device that is highly audible and comfortable can be obtained. Also,
Even if the noise level is high to some extent, a driving sound that is audibly no problem can be obtained, and it is not necessary to reduce the noise more than necessary, and the development cost of the device can be reduced.
【００３７】請求項５の発明によると、機器を空気調和
機とし、その運転音を表す指標を該運転音に好適なラウ
ドネス及びシャープネスとしたので、送風ファンの送風
音を含む空気調和機の運転音の音質の向上を図ることが
できる。According to the invention of claim 5, the device is an air conditioner, and the loudness and the sharpness suitable for the operating sound are used as the indexes indicating the operating sound, so that the operation of the air conditioner including the blowing sound of the blowing fan is performed. The sound quality can be improved.
【図１】本発明の構成を示す図である。FIG. 1 is a diagram showing a configuration of the present invention.
【図２】本発明の実施例におけるコントローラで行われ
る信号処理動作を示すフローチャート図である。FIG. 2 is a flowchart showing a signal processing operation performed by the controller according to the embodiment of the present invention.
【図３】運転音制御装置の全体構成を示すブロック図で
ある。FIG. 3 is a block diagram showing an overall configuration of a driving sound control device.
【図４】音質マップの特性図である。FIG. 4 is a characteristic diagram of a sound quality map.
【図５】空気調和機の概略正面図である。FIG. 5 is a schematic front view of the air conditioner.
【図６】図５のVI―VI線断面図である。6 is a sectional view taken along line VI-VI of FIG.
（Ａ） 空気調和機 （６） ファン （７） マイクロフォン（運転音検出手段、騒音検出手
段） （８） スピーカ （１１） コントローラ （１４） ラウドネス計算回路（指標計算手段） （１５） シャープネス計算回路（指標計算手段） （１６） 記憶部（記憶手段） （１７） 音質計算回路（音質計算手段） （１９） 基準音質設定部（基準音質設定手段） （２０） 運転音能動制御回路（制御手段） （２２） 音質計測装置 （２３） 運転音制御装置(A) Air conditioner (6) Fan (7) Microphone (driving sound detection means, noise detection means) (8) Speaker (11) Controller (14) Loudness calculation circuit (index calculation means) (15) Sharpness calculation circuit ( (Index calculation means) (16) Storage unit (storage means) (17) Sound quality calculation circuit (sound quality calculation means) (19) Reference sound quality setting unit (reference sound quality setting means) (20) Driving sound active control circuit (control means) ( 22) Sound quality measuring device (23) Driving sound control device
Claims (5)
ことで、互いに無相関の関係にある２つの主成分を２次
元の座標としかつ騒音の物理量から求められる指標と相
関関係のある音質マップをデータベースとして設けてお
き、 実際の騒音を検出して該騒音の上記指標を計算するとと
もに、該指標を上記音質マップに照合して騒音の音質を
計算することを特徴とする騒音の音質計測方法。1. A sound quality correlated with an index obtained from a physical quantity of noise by analyzing in advance a number of components representing noise to make two principal components that are uncorrelated with each other into two-dimensional coordinates. A sound quality measurement of noise, characterized in that a map is provided as a database, actual noise is detected, the index of the noise is calculated, and the sound quality of the noise is calculated by collating the index with the sound quality map. Method.
ことで、互いに無相関の関係にある２つの主成分を２次
元の座標としかつ騒音の物理量から求められる指標と相
関関係のある音質マップをデータベースとして記憶する
記憶手段（１６）と、 実際の騒音を検出する騒音検出手段（７）と、 上記騒音検出手段（７）で検出された騒音から上記指標
を計算する指標計算手段（１４），（１５）と、 上記指標計算手段（１４），（１５）で計算された指標
を上記記憶手段（１６）の音質マップに照合して騒音の
音質を計算する音質計算手段（１７）とを備えたことを
特徴とする騒音の音質計測装置。2. A sound quality correlated with an index obtained from a physical quantity of noise, by analyzing in advance a number of components representing noise to make two principal components that are uncorrelated with each other into two-dimensional coordinates. Storage means (16) for storing the map as a database, noise detection means (7) for detecting actual noise, and index calculation means (14) for calculating the index from the noise detected by the noise detection means (7). ), (15), and a sound quality calculation means (17) for calculating the sound quality of noise by comparing the indexes calculated by the index calculation means (14), (15) with the sound quality map of the storage means (16). A sound quality measuring device for noise, characterized by being equipped with.
解析することで、互いに無相関の関係にある２つの主成
分を２次元の座標としかつ運転音の物理量から求められ
る指標と相関関係のある音質マップをデータベースとし
て設けておき、 機器の実際の運転音を検出して該運転音の上記指標を計
算するとともに、該指標を上記音質マップに照合して運
転音の音質を計算し、この運転音の音質を予め設定され
ている基準音質と比較して両音質の差に基づく補正信号
を生成し、この補正信号をスピーカ（８）に出力して該
スピーカ（８）から機器の運転音との合成音が基準音質
になるような補正音を放射させることを特徴とする機器
運転音の音質制御方法。3. Preliminarily analyzing a large number of components representing a driving sound of a device to make two principal components that are uncorrelated with each other into two-dimensional coordinates and correlate with an index obtained from a physical quantity of the driving sound. A related sound quality map is provided as a database, the actual driving sound of the device is detected, the above-mentioned index of the driving sound is calculated, and the sound quality of the driving sound is calculated by collating the index with the above-mentioned sound quality map. , Comparing the sound quality of this driving sound with a preset reference sound quality to generate a correction signal based on the difference between the two sound qualities, outputting this correction signal to the speaker (8), and outputting the correction signal from the speaker (8) to the device. A sound quality control method for a device operation sound, which comprises radiating a correction sound such that a synthetic sound of the operation sound becomes a reference sound quality.
解析することで、互いに無相関の関係にある２つの主成
分を２次元の座標としかつ運転音の物理量から求められ
る指標と相関関係のある音質マップをデータベースとし
て記憶する記憶手段（１６）と、 予め機器の基準となる運転音の音質を設定する基準音質
設定手段（１９）と、 機器の実際の運転音を検出する運転音検出手段（７）
と、 上記運転音検出手段（７）とは離れた位置に配置された
スピーカ（８）と、 上記運転音検出手段（７）で検出された運転音から上記
指標を計算する指標計算手段（１４），（１５）と、 上記指標計算手段（１４），（１５）で計算された指標
を上記記憶手段（１６）の音質マップに照合して運転音
の音質を計算する音質計算手段（１７）と、 上記音質計算手段（１７）で計算された運転音の音質を
上記基準音質設定手段（１９）で設定されている基準音
質と比較して両音質の差に基づく補正信号を生成し、こ
の補正信号を上記スピーカ（８）に出力して該スピーカ
（８）から機器の運転音との合成音が基準音質になるよ
うな補正音を放射させる制御手段（２０）とを備えたこ
とを特徴とする機器運転音の音質制御装置。4. A large number of components representing the driving sound of the device are analyzed in advance so that two main components having no correlation with each other are made into two-dimensional coordinates and correlated with an index obtained from the physical quantity of the driving sound. A storage means (16) for storing a related sound quality map as a database, a reference sound quality setting means (19) for setting a sound quality of a driving sound which is a reference of the equipment in advance, and a driving sound for detecting an actual driving sound of the equipment. Detection means (7)
A speaker (8) arranged at a position distant from the driving sound detecting means (7), and an index calculating means (14) for calculating the index from the driving sound detected by the driving sound detecting means (7). ), (15), and the sound quality calculation means (17) for calculating the sound quality of the driving sound by collating the indexes calculated by the index calculation means (14), (15) with the sound quality map of the storage means (16). And comparing the sound quality of the driving sound calculated by the sound quality calculation means (17) with the reference sound quality set by the reference sound quality setting means (19) to generate a correction signal based on the difference between the two sound quality. And a control means (20) for outputting a correction signal to the speaker (8) and radiating a correction sound from the speaker (8) such that a synthesized sound of a driving sound of the device becomes a reference sound quality. A sound quality control device for operating sound of equipment.
和機であり、 運転音検出手段（７）は、上記送風ファン（６）の送風
音を含む空気調和機の運転音を検出するものであり、 機器の運転音の物理量から求められる指標は、音の大き
さを表すラウドネス及び音の金属音性を表すシャープネ
スであることを特徴とする請求項４記載の機器運転音の
音質制御装置。5. The device is an air conditioner having a blower fan (6), and the operation sound detecting means (7) detects the operation sound of the air conditioner including the blower sound of the blower fan (6). The sound quality control of the device operating sound according to claim 4, wherein the indexes obtained from the physical quantity of the operating sound of the device are loudness indicating the loudness of the sound and sharpness indicating the metallic tone of the sound. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21768092A JPH0666625A (en) | 1992-08-17 | 1992-08-17 | Method and apparatus for measuring sound quality of noise, and method and apparatus for controlling sound quality of operational sound of machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21768092A JPH0666625A (en) | 1992-08-17 | 1992-08-17 | Method and apparatus for measuring sound quality of noise, and method and apparatus for controlling sound quality of operational sound of machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666625A true JPH0666625A (en) | 1994-03-11 |
Family
ID=16708039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21768092A Withdrawn JPH0666625A (en) | 1992-08-17 | 1992-08-17 | Method and apparatus for measuring sound quality of noise, and method and apparatus for controlling sound quality of operational sound of machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666625A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2147535A1 (en) * | 1998-04-11 | 2000-09-01 | Samsung Electronics Co Ltd | Noise tester for an indoor unit of an air conditioner |
| WO2007061584A1 (en) * | 2005-11-17 | 2007-05-31 | Microsoft Corporation | Determination of audio device quality |
| JP2010066217A (en) * | 2008-09-12 | 2010-03-25 | Calsonic Kansei Corp | Method for evaluating sound quality of air conditioning sound, and air conditioning unit |
| JP2011242223A (en) * | 2010-05-17 | 2011-12-01 | Panasonic Corp | Quality checkup method and quality checkup device |
-
1992
- 1992-08-17 JP JP21768092A patent/JPH0666625A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2147535A1 (en) * | 1998-04-11 | 2000-09-01 | Samsung Electronics Co Ltd | Noise tester for an indoor unit of an air conditioner |
| WO2007061584A1 (en) * | 2005-11-17 | 2007-05-31 | Microsoft Corporation | Determination of audio device quality |
| JP2010066217A (en) * | 2008-09-12 | 2010-03-25 | Calsonic Kansei Corp | Method for evaluating sound quality of air conditioning sound, and air conditioning unit |
| JP2011242223A (en) * | 2010-05-17 | 2011-12-01 | Panasonic Corp | Quality checkup method and quality checkup device |
| US8885848B2 (en) | 2010-05-17 | 2014-11-11 | Panasonic Corporation | Quality evaluation method and quality evaluation apparatus |
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