![background image](http://html1.mh-extra.com/html/bandk/2250-light/2250-light_user-manual_3074682036.webp)
26
2250 Light – User Manual
Assessing a fluctuating noise level means getting a value for a level that is, in simple terms, the
average level. The ‘equivalent continuous sound level’, L
eq
, is known around the globe as the
essential averaged parameter. L
eq
is the level that, had it been a steady level during the
measurement period, would represent the amount of energy present in the measured,
fluctuating sound pressure level. It is a measure of the averaged energy in a varying sound
level. It is not a direct measure of annoyance, though extensive research has shown that L
eq
correlates well with annoyance.
L
eq
is measured directly with a hand-held analyzer, such as 2250 Light
running Sound Level
Meter Software for 2250 Light, BZ-7130. If an A-weighting filter is used, it is expressed as
L
Aeq
, which is defined as
the measurement of the equivalent continuous sound level using the
A-weighted filter network
.
A full range of measurement parameters is given in Appendix B.
4.2
What is 2250 Light?
2250
Light
is a versatile hardware platform suitable for covering a wide range of different
applications. Together with Sound Level Meter Software for 2250 Light BZ-7130, it is a Class
1 modular precision integrating-averaging sound level analyzer with an easy to use interface
for quick and simple measurement setups.
4.2.1
Sound Level Meter Software for 2250 Light BZ-7130
Sound Level Meter Software for 2250 Light, BZ-7130 allows you to measure a comprehensive
set of parameters used for rating noise in terms of its impact on the environmental and working
environments and on occupational noise evaluation.
The more commonly used parameters, which cover a large range of applications, are either
instantaneous measured parameters (available at any time) or timed measured parameters
(measured within a controlled time interval):
Timed Measured Parameters
•
Equivalent Continuous Sound Levels (L
eq
– example: L
Aeq
)
•
Peak Sound Levels (L
peak
– example: L
Cpeak
)
•
Moving (or sliding) Equivalent Continuous Sound Levels (L
Aeq,T,mov
and L
Aeq,T,mov,max
)
•
Maximum Time-weighted Sound Levels (L
max
– example: L
AFmax
)
•
Minimum Time-weighted Sound Levels (L
min
– example: L
AFmin
)
•
Percentile Levels (L
N
– example: L
AF90.0
)
•
Sound Exposure Level (L
AE
)
•
Sound Exposure (example: E)
•
Daily Noise Exposure Level (example: L
ep,d
or L
EX,8h
)
•
Noise Dose (examples: based on ISO standards: Dose; based on US standards: DoseS5)
•
Number of Peaks (for example, #CPeaks(>140 dB))
•
Time Weighted Average (for example, TWA)
Summary of Contents for 2250 Light
Page 2: ......
Page 10: ......
Page 48: ...38 2250 Light User Manual...
Page 58: ...48 2250 Light User Manual...
Page 116: ...106 2250 Light User Manual...
Page 126: ...116 2250 Light User Manual...
Page 136: ...126 2250 Light User Manual...
Page 168: ...2250 Light User Manual 158...
Page 205: ......
Page 206: ......
Page 207: ......