2.4 1:1 & 1:3 Octave Band Measurement Mode
If the instrument has been fitted with the 1:1 Octave Band or the 1:3 Octave Band
filters, these measurements will be available.
In the 1:1 or 1:3 Octave Band Filter Mode, the CR:800C instrument provide a
sequential sweep through the filter bands over the measurement duration. In addition
to the frequency bands, the instruments also provide a measurement of the overall L
Aeq
,
L
Ceq
and L
Zeq
functions.
Function Frequency
Weighting
Displayed
as
Stored
Measurement
Applies to
Sound Level with Fast
Time Weighting
Z LZF No
1:1 & 1:3
Octave Bands
A LAeqt Yes Broadband
C LCeqt Yes Broadband
Equivalent Continuous
Sound Pressure Level
with integration time t
Z LZeqt Yes Broadband
The 1:1 Octave Band Filters cover the following frequency bands: 31.5Hz to 16kHz
The 1:3 Octave Band Filters cover the following frequency bands: 25Hz to 16kHz
When the MO:800/6 Options is fitted, the 1:3 Octave Band Filters include the additional
20Hz and 20kHz 1:3 Octave Band Filters.
2.5 Options & Accessories
The CR:800C Series are also available with a range of options and accessories that can
enhance the performance and applications of the instrument. For full details, please
contact Cirrus Research plc or your local representative.
The most commonly used accessories are listed below.
CR:514 Class 2 Acoustic Calibrator
CR:515 Class 1 Acoustic Calibrator
UA:237 Windshield
CK:250 Carrying Case
CP:65 Carrying Pouch for Sound Level Meter
CT:1 Tripod
CM:270/1 Preamplifier Tripod Mount
ZL:202 2m Microphone Extension Cable
ZL:205 5m Microphone Extension Cable
ZL:210 10m Microphone Extension Cable
ZL:225 25m Microphone Extension Cable
ZL:100 USB Data Cable
ZL:812 AC Output Cable to Phono Connector
ZL:813 RS232 Output Cable
CK:408C Outdoor Measurement Kit
CK:508C Lightweight Outdoor Measurement Kit
CU:800C Mains Power Supply (UK/US/EU)
SW:DD3 Deaf Defier3 Software
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