A-ISO 8253-1:1989
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comparison of the values from ISO 8253-1:1989 and ANSI S3.1-1991/1999 |
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Table X - |
the differences between ANSI Standards, issued in 1999 and 1991. |
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Table Y - |
the differences between ISO 8253-1:1989 and ANSI S3.1-1991 not which are corrected |
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for binaural listening |
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Table
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the differences between ISO 8253-1:1989 and ANSI S3.1-1999 | |
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Table
AU -
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the values from the Australian standard AS 1269.4-1998 | |
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| This table shows the maximum permissible ambient sound pressure levels in one-third octave bands from ISO 8253-1:1989 and ANSI S3.1 - 1991/1999 standards. | ||
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A-ISO 8253-1:1989 |
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| B1-ANSI S3.1-1991 | ||
| B2-ANSI S3.1-1991-3dB | ||
| C-ANSI S3.1-1999 | ||
| click on the table for bigger picture | up | |
| * Note: Column D - These corrections (+8dB) can be used in the case that maximum uncertainty of +5 dB due to ambient noise is permitted. | ||
| B2 - red numbers - the ANSI standard from 1991 was prepared for monaural listening. The correction for binaural listening is -3 dB. [TOM FRANK, JOHN D. DURRANT, JEAN M. LOVRINIC, Maximum permissible ambient noise levels for audiometric test rooms. http://journals.asha.org/1059-0089/v2n1/033.pdf] | ||
| The values in yellow field are only calculations. I couldn't check or compare them with the values from ANSI S3.1-1999. | ||
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| Table X shows the differences between ANSI Standards, issued in 1999 and 1991. | |
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A - ISO 8253-1:1989 |
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| B1 - ANSI S3.1-1991 | |
| B2 - ANSI S3.1-1991 -3dB | |
| C - ANSI S3.1-1999 | |
| X1 - differences between C and B1; X1=C-B1 | |
| X2 - differences between C and B2; X2=C-B2 | |
| Blue numbers - the values from new ANSI standard are lower than in old one. | |
| Red numbers - the new value at 8kHz is lower even if the old one is corrected for binaural listening (-3dB) | |
click on the table for bigger picture |
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| The values in yellow field are only calculations. I couldn't check or compare them with the values from ANSI S3.1-1999. | |
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| Table Y shows the differences between ISO 8253-1:1989 and ANSI S3.1-1991 which is corrected for binaural listening. | |
| This table is just for information. | |
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A - ISO 8253-1:1989 |
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| B1 - ANSI S3.1-1991 | |
| B2 - ANSI S3.1-1991 -3dB | |
| C - ANSI S3.1-1999 | |
| Y - differences between A and B2; Y=A-B2 | |
| Red numbers - the value at 8kHz is higher even if the old one is corrected for binaural listening (-3dB) | |
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| Table Z shows the differences between ISO 8253-1:1989 and ANSI S3.1-1999 | |
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A - ISO 8253-1:1989 |
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| B1 - ANSI S3.1-1991 | |
| B2 - ANSI S3.1-1991 -3dB | |
| C - ANSI S3.1-1999 | |
| Z - differences between A and C; Z=A-C | |
| Blue numbers - the values from the ISO 8253-1 standard are lower than in the ANSI S.3-1999 standard. | |
| The values in yellow field are only calculations. I couldn't check or compare them with the values from ANSI S3.1-1999. | |
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| Table AU shows the values from the Australian standard AS 1269.4-1998 | ||
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| click on the table for bigger picture | ||
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