2 Terminology and Notation
Correspondence table between measurement quantity notation and measurement quantity name based on the standard
The table shows the correspondence between the measurable NL-63 notations and the measurement quantity names according to standards (IEC 61672-1, ISO 1996).
- The device does not distinguish between “sound level” and “sound pressure level” with or without frequency weighting; it simply indicates “sound level.”
- Regarding the quantifiers Lp, Lmax, Lmin, and LN, the expression is independent of time weighting (F, S, 10 s, I).
NL-63 notation | Measurement quantity name | |||||
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Measurement quantity setting |
Frequency weighting | Time weighting | ||||
F | S | τ =10 s | I |
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Lp Time-weighted sound level |
A | LAF | LAS | LAτ | LAI | A-weighted and time-weighted sound level |
C | LCF | LCS | LCτ | LCI | C-weighted and time-weighted sound level | |
Z | LZF | LZS | LZτ | LZI | Z-weighted and time-weighted sound level | |
G | LGF | LGS | LGτ | LGI | G-weighted and time-weighted sound level | |
Leq Equivalent continuous sound level |
A | LAeq | - | A-weighted equivalent continuous sound level A-weighted time-averaged sound level |
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- | LAIeq | I-time-weighted equivalent continuous sound level | ||||
C | LCeq | C-weighted equivalent continuous sound level C-weighted time-averaged sound level |
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Z | LZeq | Z-weighted equivalent continuous sound level Z-weighted time-averaged sound level |
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G | LGeq | G-weighted equivalent continuous sound level G-weighted time-averaged sound level |
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Leq,mov Moving Leq |
A | LAeq,mov | - | A-weighted moving Leq | ||
C | LCeq,mov | C-weighted moving Leq | ||||
Z | LZeq,mov | Z-weighted moving Leq | ||||
G | LGeq,mov | G-weighted moving Leq | ||||
LE Sound exposure level |
A | LAE | A-weighted sound exposure level | |||
C | LCE | C-weighted sound exposure level | ||||
Z | LZE | Z-weighted sound exposure level | ||||
G | LGE | G-weighted sound exposure level | ||||
Lmax Maximum time-weighted sound level |
A | LAFmax | LASmax | LAτmax | LAImax | Maximum A-weighted and time-weighted sound level |
C | LCFmax | LCSmax | LCτmax | LCImax | Maximum C-weighted and time-weighted sound level | |
Z | LZFmax | LZSmax | LZτmax | LZImax | Maximum Z-weighted and time-weighted sound level | |
G | LGFmax | LGSmax | LGτmax | LGImax | Maximum G-weighted and time-weighted sound level | |
Lmin Minimum time-weighted sound level |
A | LAFmin | LASmin | LAτmin | LAImin | Minimum A-weighted and time-weighted sound level |
C | LCFmin | LCSmin | LCτmin | LCImin | Minimum C-weighted and time-weighted sound level | |
Z | LZFmin | LZSmin | LZτmin | LZImin | Minimum Z-weighted and time-weighted sound level | |
G | LGFmin | LGSmin | LGτmin | LGImin | Minimum G-weighted and time-weighted sound level | |
LN N percentage exceedance sound level |
A | LAFN | LASN | LAτN | LAIN | N percentage exceedance A-weighted sound level |
C | LCFN | LCSN | LCτN | LCIN | N percentage exceedance C-weighted sound level | |
Z | LZFN | LZSN | LZτN | LZIN | N percentage exceedance Z-weighted sound level | |
G | LGFN | LGSN | LGτN | LGIN | N percentage exceedance G-weighted sound level | |
Lpeak Peak sound level |
A | LApeak | A-weighted peak sound level | |||
C | LCpeak | C-weighted peak sound level | ||||
Z | LZpeak | Z-weighted peak sound level | ||||
G | LGpeak | G-weighted peak sound level | ||||
Ltm5 Takt-max sound level |
A | LAtm5 | - | Takt-max A-weighted sound level | ||
C | - | Takt-max C-weighted sound level | ||||
Z | - | Takt-max Z-weighted sound level | ||||
G | - | Takt-max G-weighted sound level |
Correspondence between measurement quantity notation and quantifier notation for each standard
The table shows the correspondence between the measurable NL-63 notations and the quantifiers for each standard (IEC 61672-1, ISO 1996).
- JIS Z 8731 is based on ISO 1996, but since there are some differences in the quantifier notation, the relevant sections are listed separately.
- Regarding the quantifiers Lp, Lmax, Lmin, and LN, the notation of time weighting (F, S, 10 s, I) is omitted.
NL-63 notation | Quantifiers for each standard | ||||
---|---|---|---|---|---|
Measurement quantity setting | Frequency weighting | Quantifier | IEC 61672-1 (JIS C 1509-1) |
ISO 1996 | JIS Z 8731 |
Lp Time-weighted sound level |
A | LA | LA | LpA | |
C | LC | LC | - | ||
Z | LZ | LZ | Lp | ||
G | LG | - | - | ||
Leq Equivalent continuous sound level |
A | LAeq | LAeq,T | LAeq,T /LAeq | |
LIeq | - | - | |||
C | LCeq | - | - | ||
Z | LZeq | - | - | ||
G | LGeq | - | - | ||
Leq,mov Moving Leq |
A | LAeq,mov | - | - | |
C | LCeq,mov | - | - | ||
Z | LZeq,mov | - | - | ||
G | LGeq,mov | - | - | ||
LE Sound exposure level |
A | LAE | LAE,T /LAE | LEA | LEA,T /LEA |
C | LCE | LCE | - | ||
Z | LZE | LZE | - | ||
G | LGE | - | - | ||
Lmax Maximum time-weighted sound level |
A | LAmax | LAmax | LAmax | LpA,max |
C | LCmax | LCmax | LCmax | - | |
Z | LZmax | LZmax | - | ||
G | LGmax | - | - | ||
Lmin Minimum time-weighted sound level |
A | LAmin | - | - | |
C | LCmin | - | - | ||
Z | LZmin | - | - | ||
G | LGmin | - | - | ||
LN N percentage exceedance sound level |
A | LAN | - | LAN,T | |
C | LCN | - | - | ||
Z | LZN | - | - | ||
G | LGN | - | - | ||
Lpeak Peak sound level |
A | LApeak | - | - | |
C | LCpeak | LCpeak | - | ||
Z | LZpeak | - | - | ||
G | LGpeak | - | - | ||
Ltm5 Takt-max sound level |
A | LAtm5 | - | - | |
C | - | - | - | ||
Z | - | - | - | ||
G | - | - | - |
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