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Difference between revisions of "Sound Quality Lite"
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→FAQ about loundness
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• '''ISO532-1 Specific loudness ch 1 | • '''ISO532-1''' Specific loudness ch 1 | ||
According to the standards ISO532-1 : It is computed on the whole signal, it computed a loudness value in every 2 ms. | According to the standards ISO532-1 : It is computed on the whole signal, it computed a loudness value in every 2 ms. | ||
• '''ISO532-1 : Loudness ch1 | • '''ISO532-1''': Loudness ch1 | ||
According to the standards ISO532-1 : the spectrum is computed on the whole signal. The standards is for stationary signal. | According to the standards ISO532-1 : the spectrum is computed on the whole signal. The standards is for stationary signal. | ||
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According to IS0 532 B. It is computed on the whole signal, the standard is used for stationary signal, so there is only one value. | According to IS0 532 B. It is computed on the whole signal, the standard is used for stationary signal, so there is only one value. | ||
• '''ISO532-2: Loudness Ch1: | • '''ISO532-2''': Loudness Ch1: | ||
ISO532-2 standard : It is the “American Loudness standard” (This standard replaces ISO 532 A (loudness according to Stevens) and it is based on ANSI S3.4-2007 standard for calculating stationary loudness according to Moore. | ISO532-2 standard : It is the “American Loudness standard” (This standard replaces ISO 532 A (loudness according to Stevens) and it is based on ANSI S3.4-2007 standard for calculating stationary loudness according to Moore. | ||
It is computed on the whole signal, the standard is used for stationary signal, so there is only one value. | It is computed on the whole signal, the standard is used for stationary signal, so there is only one value. | ||
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It is based on DIN 45631/A1 standard for determining both stationary and time variable noise according to Zwicker. | It is based on DIN 45631/A1 standard for determining both stationary and time variable noise according to Zwicker. | ||
The new standards ISO 532-1 add: | The new standards ISO 532-1 add: | ||
- avoid any uncertainty regarding the practical implementation. | - avoid any uncertainty regarding the practical implementation. | ||
- Better continuity and comparability than earlier calculations. | - Better continuity and comparability than earlier calculations. | ||