Equal Loudness: Difference between revisions

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~~Equal Loudness Curves~~

[[Image:EqualLoudness400px-Lindos1.svg.png|right]]

~~You~~ will see references to Equal Loudness Curves (Contours) ~~and for~~ the performing musician, this means that what you hear at relatively low levels may differ significantly when you turn up the volume. Specifically, if you create your tone for voice or instrument at low levels, when you turn it up for performance what you will hear will be louder but also significantly different with respect to the tone.

In many discussions on the {{forum}} you will see references to Equal Loudness Curves (Contours). For the performing musician, this means that what you hear at relatively low levels may differ significantly when you turn up the volume. The difference will be more than volume, it will be in the spectral balance (your tone) of what you hear.

Specifically, if you create your tone for voice or instrument at low levels, when you turn it up for performance what you will hear will be louder but also significantly different with respect to the tone.

Here is an excerpt from [http://en.wikipedia.org/wiki/Equal-loudness_contour Wikipedia]

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== Recent revision aimed at more precise determination - ISO 226:2003 ==

Because of perceived discrepancies between early and more recent determinations, the [[International Organization for Standardization]] (ISO) recently revised its standard curves as defined in ISO 226, in response to the recommendations of a study coordinated by the Research Institute of Electrical Communication, Tohoku University, Japan. The study produced new curves by combining the results of several studies, by researchers in Japan, Germany, Denmark, UK, and USA. (Japan was the greatest contributor with about 40% of the data.) This has resulted in the recent acceptance of a new set of curves standardized as ISO 226:2003. The report comments on the surprisingly large differences, and the fact that the original Fletcher-Munson contours are in better agreement with recent results than the Robinson-Dadson, which appear to differ by as much as 10–15 dB especially in the low-frequency region, for reasons that are not explained.[http://www.nedo.go.jp/itd/grant-e/report/00pdf/is-01e.pdf]

Because of perceived discrepancies between early and more recent determinations, the [http://en.wikipedia.org/wiki/International_Organization_for_Standardization International Organization for Standardization] (ISO) recently revised its standard curves as defined in ISO 226, in response to the recommendations of a study coordinated by the Research Institute of Electrical Communication, Tohoku University, Japan. The study produced new curves by combining the results of several studies, by researchers in Japan, Germany, Denmark, UK, and USA. (Japan was the greatest contributor with about 40% of the data.) This has resulted in the recent acceptance of a new set of curves standardized as ISO 226:2003. The report comments on the surprisingly large differences, and the fact that the original Fletcher-Munson contours are in better agreement with recent results than the Robinson-Dadson, which appear to differ by as much as 10–15 dB especially in the low-frequency region, for reasons that are not explained.[http://www.nedo.go.jp/itd/grant-e/report/00pdf/is-01e.pdf]

--- Read the whole article: [http://en.wikipedia.org/wiki/Equal-loudness_contour Equal-loudness contour, in Wikipedia]

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-Equal Loudness Curves
 [[Image:EqualLoudness400px-Lindos1.svg.png|right]]
-You will see references to Equal Loudness Curves (Contours) and for the performing musician, this means that what you hear at relatively low levels may differ significantly when you turn up the volume. Specifically, if you create your tone for voice or instrument at low levels, when you turn it up for performance what you will hear will be louder but also significantly different with respect to the tone.
+In many discussions on the {{forum}} you will see references to Equal Loudness Curves (Contours). For the performing musician, this means that what you hear at relatively low levels may differ significantly when you turn up the volume. The difference will be more than volume, it will be in the spectral balance (your tone) of what you hear.
+Specifically, if you create your tone for voice or instrument at low levels, when you turn it up for performance what you will hear will be louder but also significantly different with respect to the tone.
 Here is an excerpt from [http://en.wikipedia.org/wiki/Equal-loudness_contour Wikipedia]
@@ Line 20: / Line 21: @@
 == Recent revision aimed at more precise determination - ISO 226:2003 ==
-Because of perceived discrepancies between early and more recent determinations, the [[International Organization for Standardization]] (ISO) recently revised its standard curves as defined in ISO 226, in response to the recommendations of a study coordinated by the Research Institute of Electrical Communication, Tohoku University, Japan. The study produced new curves by combining the results of several studies, by researchers in Japan, Germany, Denmark, UK, and USA.  (Japan was the greatest contributor with about 40% of the data.)  This has resulted in the recent acceptance of a new set of curves standardized as ISO 226:2003. The report comments on the surprisingly large differences, and the fact that the original Fletcher-Munson contours are in better agreement with recent results than the Robinson-Dadson, which appear to differ by as much as 10–15 dB especially in the low-frequency region, for reasons that are not explained.[http://www.nedo.go.jp/itd/grant-e/report/00pdf/is-01e.pdf]
+Because of perceived discrepancies between early and more recent determinations, the [http://en.wikipedia.org/wiki/International_Organization_for_Standardization International Organization for Standardization] (ISO) recently revised its standard curves as defined in ISO 226, in response to the recommendations of a study coordinated by the Research Institute of Electrical Communication, Tohoku University, Japan. The study produced new curves by combining the results of several studies, by researchers in Japan, Germany, Denmark, UK, and USA.  (Japan was the greatest contributor with about 40% of the data.)  This has resulted in the recent acceptance of a new set of curves standardized as ISO 226:2003. The report comments on the surprisingly large differences, and the fact that the original Fletcher-Munson contours are in better agreement with recent results than the Robinson-Dadson, which appear to differ by as much as 10–15 dB especially in the low-frequency region, for reasons that are not explained.[http://www.nedo.go.jp/itd/grant-e/report/00pdf/is-01e.pdf]
 --- Read the whole article: [http://en.wikipedia.org/wiki/Equal-loudness_contour Equal-loudness contour, in Wikipedia]