Rion NL-42A, Instruction Manual, Page: 9 / 154

vii
Quantifi er Notation
(Sound level and sound pressure level are expressed uniformly as sound
pressure level, distinguished by the use of frequency weighting.)
Measurement value
The time weighting characteristics
F, S I
L
p
Sound pressure
level
A-weighted sound pressure level
L
AF
,
L
AS
L
AI
C-weighted sound pressure level
L
CF
,
L
CS
(
L
CI
)
Z-weighted sound pressure level
L
ZF
,
L
ZS
(
L
ZI
)
L
eq
Equivalent
continuous
sound level
Equivalent continuous A-weighted
sound level
L
Aeq
L
AIeq
Equivalent continuous C-weighted
sound level
L
Ceq
(
L
CIeq
)
Equivalent continuous Z-weighted
sound level
L
Zeq
(
L
ZIeq
)
L
E
Sound exposure
level
A-weighted sound exposure level
L
A
E
(
L
AI
E
)
C-weighted sound exposure level
L
C
E
(
L
CI
E
)
Z-weighted sound exposure level
L
Z
E
(
L
ZI
E
)
L
max
,
L
min
Maximum sound
level
Maximum A-weighted sound level
L
AFmax
,
L
ASmax
L
AImax
Maximum C-weighted sound level
L
CFmax
,
L
CSmax
(
L
CImax
)
Maximum Z-weighted sound level
L
ZFmax
,
L
ZSmax
(
L
ZImax
)
L
N
Percentile sound
level
Percentile A-weighted sound level
L
AF
N
n
,
L
AS
N
n
(
L
AI
N
n
)
Percentile C-weighted sound level
L
CF
N
n
,
L
CS
N
n
(
L
CI
N
n
)
Percentile Z-weighted sound level
L
ZF
N
n
,
L
ZS
N
n
(
L
ZI
N
n
)
L
peak
Peak sound level
A-weighted peak sound level (
L
Apeak
) ---
C-weighted peak sound level
L
Cpeak
---
Z-weighted peak sound level
L
Zpeak
---
L
tm5
Takt-max sound
level
Takt-max A-weighted sound level
L
Atm5
---
Takt-max C-weighted sound level (
L
Ctm5
) ---
Takt-max Z-weighted sound level (
L
Ztm5
) ---
• Z-weighted level is the same as an existing fl at-weighted level.
• The combination of peak sound level and takt-max with I character-
istics does not exist.
• Generally, measurement value shown in brackets ( ) are not used or
not suitable for evaluation.