JPH0344299A - Sound quality evaluation device - Google Patents
Sound quality evaluation deviceInfo
- Publication number
- JPH0344299A JPH0344299A JP18109589A JP18109589A JPH0344299A JP H0344299 A JPH0344299 A JP H0344299A JP 18109589 A JP18109589 A JP 18109589A JP 18109589 A JP18109589 A JP 18109589A JP H0344299 A JPH0344299 A JP H0344299A
- Authority
- JP
- Japan
- Prior art keywords
- time
- sound quality
- frequency
- evaluation device
- quality evaluation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013441 quality evaluation Methods 0.000 title claims description 17
- 238000004364 calculation method Methods 0.000 claims abstract description 21
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 239000013598 vector Substances 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000010354 integration Effects 0.000 claims 1
- 230000001052 transient effect Effects 0.000 abstract description 5
- 230000001186 cumulative effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- LENNRXOJHWNHSD-UHFFFAOYSA-N ethylnorepinephrine Chemical compound CCC(N)C(O)C1=CC=C(O)C(O)=C1 LENNRXOJHWNHSD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011548 physical evaluation Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、音Ｗｊａ器の評価に用いられる音質評価装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sound quality evaluation device used for evaluating a sound Wja device.
従来の技術
近年、ＣＤ、ＡＴ等の出現でグイナミノクレンジの拡大
、歪率の低減、周波数特性の平坦化により音質が向上さ
れ、微小信号再生技術が発展してきた。それとともにそ
の技術により再生された高品位の音を評価することも重
要視されてきた。従来からスピーカをはしめ各種音９機
器の音質の評価を行なう１つの手段としてオートライブ
ナ−分布（ジエー・ニー・イー・ニス ３１Ｓ ４号（
１９８３年） （Ｊ、 Ａ、 Ｅ、 Ｓ、 、 ＶＯ
Ｌ、 ３１゜Ｎｏ、４ （１９８３））に発表されてい
る。）がある。BACKGROUND OF THE INVENTION In recent years, with the advent of CD, AT, etc., sound quality has been improved by expanding the range, reducing distortion, and flattening frequency characteristics, and minute signal reproduction technology has been developed. At the same time, it has also become important to evaluate the high-quality sound reproduced using this technology. Conventionally, one method of evaluating the sound quality of nine various sound devices using speakers has been the auto-livener distribution (GNI E.N.S. 31S No. 4).
1983) (J, A, E, S, , VO
L., 31° No. 4 (1983)). ).
スピーカの従来の評価の一例を示す。スピーカのインパ
ルス応答を受聴点において取り込み、それを用い演算し
たオートライブナ−分布の出力を時間方向に任意の時間
まで加算した結果を時間毎に図示したものである。（以
下、累積パワー分布と呼ぶ）
第６図は、スピーカの累積パワー分布による評価結果で
ある。Ｘ軸に周波数、Ｙ軸に時間、Ｚ軸にパワーを示し
ている。時間方向にどのような周波数成分の信号が残っ
ているかがわかる。また試聴実験での音質評価結果を物
理特性から説明することができる。An example of conventional evaluation of speakers is shown. The impulse response of the speaker is taken in at the listening point, and the output of the auto-livener distribution calculated using it is added up to an arbitrary time in the time direction, and the result is shown for each time. (Hereinafter referred to as cumulative power distribution) FIG. 6 shows the evaluation results based on the cumulative power distribution of the speaker. The X-axis shows frequency, the Y-axis shows time, and the Z-axis shows power. You can see what frequency components remain in the signal in the time direction. Also, the sound quality evaluation results in listening experiments can be explained from physical characteristics.
発明が解決しようとする課題
上記の累積パワー分布による物理的評価では信号を周波
数１時間で分析することができ、聴感による評価に結び
つけることが可能である。しかしながら、信号を分析で
きても、信号の方向性がわからないために、聴感の差異
として音質に影響していると考えられる信号源の分析が
困難という問題点を有していた。Problems to be Solved by the Invention In the physical evaluation based on the cumulative power distribution described above, a signal can be analyzed at a frequency of 1 hour, and it is possible to link this to the auditory evaluation. However, even if the signal can be analyzed, the directionality of the signal is not known, so it is difficult to analyze the signal source that is thought to be affecting the sound quality as a difference in hearing sensation.
本発明は上記問題点に鑑み、入力された信号のパワーの
過渡応答特性の３次元成分を分析しそれぞれの成分毎に
３次元表示する音質評価装置を提供するものである。In view of the above-mentioned problems, the present invention provides a sound quality evaluation device that analyzes three-dimensional components of the transient response characteristics of the power of an input signal and displays each component three-dimensionally.
課題を解決するための手段
上記課題を解決するために、受聴点と信号源を結ぶ直線
方向及びそれに互いに直交する方向、合計３方向それぞ
れの方向において一定距離離れた２点の音響信号をマイ
クロホンを用いて得る入力手段、各方向について入力手
段から入力された２つの信号から時間と周波数の関数で
表される大きさをクロスウィグナー分布演算（ジエー・
ニー・イー・ニス ３１巻 ４号（１９８３年）（Ｊ。Means for Solving the Problems In order to solve the above problems, a microphone is used to collect acoustic signals from two points a certain distance apart in each of three directions: a straight line connecting the listening point and the signal source, and a direction orthogonal to each direction. Cross Wigner distribution calculation (J.
N.E. Nis Vol. 31 No. 4 (1983) (J.
Ａ、 Ｅ、 Ｓ、 、 Ｖ○Ｌ、３１．Ｎα４ （１９
８３）に発表されている。）により得、その結果を時間
方向に積分する演算を行なう分析演算手段、その結果を
それぞれの方向毎に時間１周波数、大きさの３次元で表
示する表示手段により構成されている。A, E, S, , V○L, 31. Nα4 (19
83). ) and integrates the result in the time direction, and a display means that displays the result in three dimensions of time, frequency, and size in each direction.
作用
本発明は上記構成により、それぞれ２つの音響信号から
３次元成分毎のパワーの過渡応答特性を分析表示するこ
とができ、その結果をもとに音響機器の音質の差異を物
理的な値としてとらえ、信号源の方向を分析することが
可能となる。With the above configuration, the present invention can analyze and display the power transient response characteristics of each three-dimensional component from two acoustic signals, and based on the results, the difference in sound quality of audio equipment can be expressed as a physical value. This makes it possible to detect and analyze the direction of the signal source.
実施例
以下本発明の一実施例における音質評価装置について図
面を参照しながら説明する。Embodiment A sound quality evaluation device according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の音質評価装置のブロック図を示すもの
である。FIG. 1 shows a block diagram of a sound quality evaluation device according to the present invention.
ｌは人力部、１ａはマイクロホン、ｌｂはＡ／Ｄ変換器
、２は分析演算部、２ａはクロス・ライブナ−分布演算
部、２ｂは積分演算部、３は表示部、４はベクトル表示
部である。1 is a human power section, 1a is a microphone, lb is an A/D converter, 2 is an analysis calculation section, 2a is a cross-Leibner distribution calculation section, 2b is an integral calculation section, 3 is a display section, and 4 is a vector display section. be.
第２図は本発明音質評価装置の人力部１のマイクロホン
１ａのＸＹ平面上の位置を示すものである。第３図は本
発明音質評価装置の入力部１のマイクロホン１ａのＹＺ
平面上の位置を示すものである。FIG. 2 shows the position of the microphone 1a of the human power section 1 of the sound quality evaluation apparatus of the present invention on the XY plane. FIG. 3 shows the YZ of the microphone 1a of the input section 1 of the sound quality evaluation device of the present invention.
It shows the position on the plane.
１０はスピーカで従来例に用いたものと同様であり、１
１は受聴点、１２ａ、１２ｂは受聴点１１における信号
のＸ成分の分析を行なうための入力であるインパルス応
答を取り込むマイクロホンの位置、同様に１３ａ、１３
ｂはＹ成分の分析のためのマイクロホンの位置、１４ａ
、１４ｂはＺｒｊｉ。10 is a speaker similar to that used in the conventional example;
1 is the listening point; 12a and 12b are the positions of microphones that take in the impulse response that is the input for analyzing the X component of the signal at the listening point 11; similarly, 13a and 13
b is the microphone position for analyzing the Y component, 14a
, 14b is Zrji.
分の分析のためのマイクロホンの位置である。Microphone position for minute analysis.
以上のように構成された音質評価装置の一実施例につい
て説明する。An embodiment of the sound quality evaluation device configured as described above will be described.
マイクロホン１ａでスピーカ１０と受聴点１１を結んだ
軸（Ｙ軸）及びその軸に直交する軸（Ｘ。An axis (Y-axis) connecting the speaker 10 and the listening point 11 with the microphone 1a and an axis (X-axis) perpendicular to that axis.
Ｚ軸）の３軸上それぞれで受聴点１１の両側同距離の２
点（（１２ａ、１２ｂ）、（１３ａ、１３ｂ）、（１４
ａ、１４ｂ））におけるインパルス応答が入力部１に取
り込まれＡ／Ｄ変換器１ｂでデジタル信号化される。次
に分析演算部２において入力部１で取り込んだマイクロ
ホンの位置（１２ａ。2 at the same distance on both sides of the listening point 11 on each of the three axes (Z-axis)
Points ((12a, 12b), (13a, 13b), (14
The impulse response in a, 14b)) is taken into the input section 1 and converted into a digital signal by the A/D converter 1b. Next, in the analysis calculation unit 2, the microphone position (12a) taken in by the input unit 1.
１２ｂ）、（１３ａ、１３ｂ）、（１４ａ、１４ｂ）に
おけるインパルス応答３組を入力とし分析演算を行なう
、Ｘ軸上１２ａ、１２ｂ２点のインパルス応答からクロ
スウィグナー分布演算部２ａでクロスウィグナー分布を
計算し、その結果を積分演算部２ｂにおいて次のような
演算を行う。クロスウィグナー分布を計算した時刻ｔｉ
からｔ２の間で、任意の間隔ΔＬ毎に時刻ｔｌ＋ｎＸΔ
Ｌからｔ２の間を積分することにより時刻ｔｌ＋ｎＸΔ
Ｌの累積パワーのＸ成分を求める計算を全周波数１時間
について行い累積パワー分布のＸ成分を得る。12b), (13a, 13b), and (14a, 14b) are input, and the cross Wigner distribution is calculated by the cross Wigner distribution calculation unit 2a from the impulse responses at the two points 12a and 12b on the X axis. Then, the following calculation is performed on the result in the integral calculation section 2b. Time ti when the Cross Wigner distribution was calculated
to t2, at every arbitrary interval ΔL, the time tl+nXΔ
By integrating from L to t2, time tl+nXΔ
Calculations for determining the X component of the cumulative power of L are performed for all frequencies for one hour to obtain the X component of the cumulative power distribution.
同様にＹ軸上１３ａ、１３ｂ２点のインパルス応答から
累積パワー分布のＹ成分を、Ｚ軸上１４ａ１４ｂ２点の
インパルス応答から累積パワー分布のＺ成分を時間と周
波数の関数として求める。分析演算部２の出力を表示部
３においてそれぞれＸ軸方向に周波数、Ｙ軸方向に時間
、さらにＸ軸方向にパワーの対数を取り表示する。第４
図（ａ）、 （ｂ）。Similarly, the Y component of the cumulative power distribution is determined from the impulse response at two points 13a and 13b on the Y axis, and the Z component of the cumulative power distribution is determined from the impulse response at two points 14a and 14b on the Z axis as a function of time and frequency. The output of the analysis calculation unit 2 is displayed on the display unit 3 by taking the frequency in the X-axis direction, the time in the Y-axis direction, and the logarithm of the power in the X-axis direction. Fourth
Figures (a), (b).
（Ｃ）に、音質評価装置の表示部３による表示結果を示
す。第６図において分析できなかった信号の方向成分を
時間９周波数の関数として得ることができ方向成分毎に
音質差異に対するの客観的な評価が可能となる。さらに
ベクトル表示部４でそれぞれｘ、 ｙ、 ｚ軸上で
の分析演算部２の演算結果をベクトル加算し受聴点１１
のおける信号源方向を示すベクトルとして表示する。第
５図にベクトル表示部４の一表示結果を示す。その結果
、表示部３の結果に比べてさらに細かく視覚的に信号の
方向成分をとらえ、信号源を点として解析できるため、
音響機器のより適切な改善を行なうことができる。(C) shows the display results on the display unit 3 of the sound quality evaluation device. The directional components of the signal that could not be analyzed in FIG. 6 can be obtained as a function of time and frequency, making it possible to objectively evaluate differences in sound quality for each directional component. Furthermore, the calculation results of the analysis calculation unit 2 on the x, y, and z axes are added as vectors on the vector display unit 4, and the listening point 11 is
It is displayed as a vector indicating the direction of the signal source at . FIG. 5 shows one display result of the vector display section 4. As a result, the directional components of the signal can be visually captured in more detail than the results on the display unit 3, and the signal source can be analyzed as a point.
More appropriate improvements to audio equipment can be made.
なお、表示手段として３次元表示を用いたが、２次元で
大きさを等高線図表示してもよく、さらに時間２周波数
、大きさの軸との対応も評価しやすい表示を選択しても
よい。また、ベクトル表示手段として受聴点における信
号の方向を２次元表示してもよく、また信号源を中心と
した表示にしてもよい。Although a three-dimensional display was used as a display means, the size may be displayed in a two-dimensional contour map, or a display that facilitates evaluation of the correspondence between time, frequency, and size axes may be selected. . Furthermore, the direction of the signal at the listening point may be displayed two-dimensionally as a vector display means, or the direction of the signal at the listening point may be displayed centered on the signal source.
発明の効果
以上のように本発明は音質の差異の原因を探るため分析
演算部と表示部によって聴感上の音質の差異を表現する
パワーの過渡応答特性の各方向成分を入力された信号を
もとに各時間１周波数毎に解析表示することを可能にす
る音質評価装置を実現するものである。Effects of the Invention As described above, in order to find the cause of the difference in sound quality, the present invention uses an analysis calculation section and a display section to analyze the input signal of each directional component of the power transient response characteristic that expresses the difference in sound quality in the auditory sense. The purpose of this invention is to realize a sound quality evaluation device that enables analysis and display for each frequency at each time.
第１図は本発明の一実施例の音質評価装置のブロック図
、第２図は本発明の一実施例の音響評価装置の入力部の
マイクロホンのＸＹ平面上の位置を表す説明図、第３図
は本発明の一実施例の音質評価装置の入力部のマイクロ
ホンのＹＺ平面上の位置を表す説明図、第４図はスピー
カの音質評価装置表示部の出力結果を表す説明図、第５
図はスピーカの音質評価装置ベクトル表示部の出力結果
を表す説明図、第６図は従来例のスピーカの累積パワー
分布表す説明図である。
１・・・・・・入力部、２・・・・・・分析演算部、３
・・・・・・表示部、４・・・・・・ベクトル表示部、
１０・・・・・・スピーカ、１１・・・・・・受聴点。FIG. 1 is a block diagram of a sound quality evaluation device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the position on the XY plane of the microphone of the input section of the sound evaluation device according to an embodiment of the present invention, and FIG. The figures are an explanatory diagram showing the position on the YZ plane of the microphone of the input section of the sound quality evaluation device according to an embodiment of the present invention, FIG. 4 is an explanatory diagram showing the output result of the display section of the sound quality evaluation device of the speaker, and FIG.
The figure is an explanatory diagram showing the output results of the vector display unit of the speaker sound quality evaluation device, and FIG. 6 is an explanatory diagram showing the cumulative power distribution of a conventional speaker. 1...Input section, 2...Analysis calculation section, 3
...Display section, 4...Vector display section,
10...Speaker, 11...Listening point.
Claims (2)
直交する２つの方向それぞれ３方向で、各方向毎に一定
距離隔てた２つの場所の音響信号をマイクロホンを用い
て得る入力手段と、各方向について入力手段から入力さ
れた２つの信号から時間と周波数の関数で表される大き
さを得るクロスウィグナー分布演算とクロスウィグナー
分布演算結果を周波数毎にある時間を基点として任意の
時間幅ΔＴを増加もしくは減少させながら積分を行なう
積分演算とを行なう分析演算手段と、分析演算手段結果
をそれぞれの方向毎に時間、周波数、大きさの３次元で
表示する表示手段とを有することを特徴とする音質評価
装置。(1) Input means that uses a microphone to obtain acoustic signals from two locations separated by a certain distance in each direction in three directions: a straight line connecting the signal source and the listening point, and two directions perpendicular to the straight line; , Cross Wigner distribution calculation to obtain the magnitude expressed as a function of time and frequency from the two signals input from the input means for each direction, and the Cross Wigner distribution calculation result for each frequency with an arbitrary time width as the base point. It is characterized by having an analytical calculation means for performing an integral calculation that performs integration while increasing or decreasing ΔT, and a display means for displaying the results of the analytical calculation means in three dimensions of time, frequency, and magnitude for each direction. Sound quality evaluation device.
加算し受聴点または信号源における各時間、周波数毎の
信号の方向ベクトルを表示するベクトル表示手段を有す
る請求項１記載の音質評価装置。(2) The sound quality evaluation device according to claim 1, further comprising vector display means for adding the outputs of the analysis calculation means in two or three directions as vectors and displaying the direction vector of the signal for each time and frequency at the listening point or the signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18109589A JPH0832117B2 (en) | 1989-07-12 | 1989-07-12 | Sound quality evaluation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18109589A JPH0832117B2 (en) | 1989-07-12 | 1989-07-12 | Sound quality evaluation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0344299A true JPH0344299A (en) | 1991-02-26 |
| JPH0832117B2 JPH0832117B2 (en) | 1996-03-27 |
Family
ID=16094746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18109589A Expired - Lifetime JPH0832117B2 (en) | 1989-07-12 | 1989-07-12 | Sound quality evaluation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0832117B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317324A (en) * | 1991-06-20 | 1994-05-31 | Sumitomo Metal Mining Co., Ltd. | Printed antenna |
| US5757939A (en) * | 1994-12-22 | 1998-05-26 | Lucent Technologies Inc. | Method for demonstrating sound quality differences between audio samples |
| US5915029A (en) * | 1998-04-23 | 1999-06-22 | Sony Corporation | Automated testing apparatus for electronic component |
| US6124065A (en) * | 1997-08-20 | 2000-09-26 | Nec Corporation | Photosensitive body and electrophotographic printer using the same |
| US6338903B1 (en) | 1998-11-02 | 2002-01-15 | Fujitsu Limited | Resin composition for semiconductor encapsulation, method and apparatus for producing the composition, as well as semiconductor device using the composition |
| JP2004251751A (en) * | 2003-02-20 | 2004-09-09 | Mitsui Eng & Shipbuild Co Ltd | Acoustic sensor array, acoustic diagnostic device and acoustic diagnostic method |
| US8160264B2 (en) | 2008-07-30 | 2012-04-17 | Fujitsu Limited | Transfer function estimating device, noise suppressing apparatus and transfer function estimating method |
-
1989
- 1989-07-12 JP JP18109589A patent/JPH0832117B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317324A (en) * | 1991-06-20 | 1994-05-31 | Sumitomo Metal Mining Co., Ltd. | Printed antenna |
| US5757939A (en) * | 1994-12-22 | 1998-05-26 | Lucent Technologies Inc. | Method for demonstrating sound quality differences between audio samples |
| US6124065A (en) * | 1997-08-20 | 2000-09-26 | Nec Corporation | Photosensitive body and electrophotographic printer using the same |
| US5915029A (en) * | 1998-04-23 | 1999-06-22 | Sony Corporation | Automated testing apparatus for electronic component |
| US6338903B1 (en) | 1998-11-02 | 2002-01-15 | Fujitsu Limited | Resin composition for semiconductor encapsulation, method and apparatus for producing the composition, as well as semiconductor device using the composition |
| JP2004251751A (en) * | 2003-02-20 | 2004-09-09 | Mitsui Eng & Shipbuild Co Ltd | Acoustic sensor array, acoustic diagnostic device and acoustic diagnostic method |
| US8160264B2 (en) | 2008-07-30 | 2012-04-17 | Fujitsu Limited | Transfer function estimating device, noise suppressing apparatus and transfer function estimating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0832117B2 (en) | 1996-03-27 |
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