Instruction manual

ix
Quanti er Notation of Sound Level Meter NL-42/NL-52 According to In-
ternational Standards and JIS
(Excerpts from ISO 1996, 3891, IEC 61672-1, JIS Z 8202, 8731)
NL-42/52
notation
Description
Frequency
weighting
ISO
notation
IEC
notation
JIS
notation
L
Z
Sound level
Z L
p
— L
p
L
A
A-weighted sound level
A L
pA
— L
pA
L
C
C-weighted sound level
C———
L
Zeq
Equivalent continuous
sound level
Z———
L
Aeq
Equivalent continuous
A-weighted sound level
A L
Aeq,T
L
Aeq,T
L
Aeq,T
L
Ceq
Equivalent continuous
C-weighted sound level
C—L
Ceq,T
—
L
ZE
Sound exposure level
Z———
L
AE
A-weighted sound
exposure level
A L
AE
L
AE,T
L
AE
L
CE
C-weighted sound
exposure level
C———
L
AN
L
A05
Percentile A-weighted
sound level
A L
AN,T
L
A5,T
—
L
AN,T
L
A5,T
L
A10
L
A10,T
— L
A10,T
L
A50
L
A50,T
— L
A50,T
L
A90
L
A90,T
— L
A90,T
L
A95
L
A95,T
— L
A95,T
L
Amax
Maximum A-weighted
sound level
A———
L
Amin
Minimum A-weighted
sound level
A———
L
Cpk
C-weighted peak sound
level
C—L
Cpeak
—
• Z-weighted level is the same as an existing  at-weighted level.