71
Measurement
Measurement of Auxiliary Processing Values (L
peak
,
L
Cpeak
, L
Ceq
, L
Atm5
, L
AI
, L
AIeq
)
This unit can simultaneously measure L
eq
, L
E
, L
max
,
L
min
, L
N
plus one of the
items listed below.
L
peak
: FLAT peak sound level
L
Cpeak
: C-weighted peak sound level
L
Ceq
: C-weighted equivalent continuous sound level
L
Atm5
: Takt-max sound level
L
AI
: Impulse sound level
L
AIeq
: Impulse equivalent continuous sound level
The peak sound level represents sound pressure waveform peak before
averaging by time-based weighting.
L
peak
is the waveform peak level of the flat-response signal and L
Cpeak
of the
C-weighted response signal.
The impulse sound pressure level L
AI
is the impulse level with time weighting.
It can only be used on the normal screen when A-weighted characteristics are
selected.
The impulse equivalent continuous sound pressure level L
AIeq
is the equivalent
level calculated for time-weighted impulse sound pressure level. It can only
be used on the normal screen when A-weighted characteristics are selected.
The power average of maximum sound pressure level in a given interval
(5 seconds) L
Atm5
is the power average of the highest sound pressure
level over a 5-second period. It can only be used on the normal screen
when A-weighted characteristics are selected.
L
Ceq
is the C-weighted equivalent continuous sound pressure level. It can be
measured along with the equivalent continuous sound pressure level. It cannot
be used on the normal screen when C-weighted characteristics are selected.
The explanation assumes that the steps listed in the preceding chapter
"Preparations" are completed.
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