Rion NL-21 - Outline

1
Outline
The Sound Level Meter NL-21 and NL-31 are designed for sound level
measurements according to the IEC standard.
The following measurements can be made:
z Equivalent continuous sound level L
eq
z Sound exposure level L
E
z Maximum sound level L
max
z Minimum sound level L
min
z Percentile sound level L
N
(five selectable settings)
z Sound level L
p
z C-weighted peak sound level L
Cpeak
z FLAT peak sound level L
peak
z Impulse sound level L
AI
z Impulse equivalent continuous sound level L
AIeq
z Takt-max sound level L
Atm5
Measurement settings and results (level values and bar graph) are shown on
the backlit LCD panel.
Measurement data (sound level, processed data, measurement parameters) can
be stored in the internal memory of the unit or on a memory card (CompactFlash
card optional). The serial interface allows sending measurement data to a printer
or computer.
By loading an optional filter program, the unit can be used for 1/1 octave or 1/3
octave analysis with a 3rd-order Butterworth high-pass and low-pass filter.
Recorded data can be further processed on a computer.