3: Setting up the Edge via DMS
Views on the Edge
Logging
The eg5 model only logs at one minute intervals and includes the following measurements:
Meter 1 logs Lavg/Leq
• Meter 2 logs Lavg/Leq
Meter 3 logs Lavg/Leq
• Lcpk and Lmax
Lc-a (if enabled)
If the dosimeter runs for one hour, then it will log 60 Lavg/Leq
results, and 60 Lmax/Lcpk
levels. In
DMS, you can customize the logged data chart results by checking Lavg/Leq, Lcpk, and/or Lmax
measurement values.
Views on the Edge
The Edge is a user-friendly and customizable dosimeter. With a simple click of a checkbox in
DMS, you can select the appropriate measurement values or views to appear or not appear on
the display of your dosimeter. The following table briefly identifies the displayed data values and
views with a brief definition. (See the glossary for additional information of these terms.)
Definitions of Data Log Values and Views
To set up the Edge and work with noise level data, you will want to have a good understanding of
the terms listed in Table 3-1.
NOTE: The following table is based on A-weighted, slow measurements. Thus, if you choose A
or C-weighted with Fast or Slow response the measurement values will change on the
display (i.e., you selected sound pressure level with C-weighting with Fast response, it
will display as Lcf.) For further details, please see Table 3-2.
Sound pressure level—is the basic measure of noise loudness, expressed in decibels. (In DMS
this is noted as “SPL”)
Maximum sound level—is the highest sound level recorded during a measurement interval with
a particular response setting (Slow or Fast) and weighting (A or C). Lmax is the highest value
that is included in Lavg or dose calculations.
Under OSHA regulations, unprotected workers may not be exposed to maximum sound levels
greater than 115 dB, measured with a Slow response rate.
Peak Level—is the highest instantaneous sound pressure level recorded during a measurement
interval. Unlike the maximum level, the peak is detected independently of dosimeter settings for
response rate or weighting.
Under OSHA regulations, unprotected workers may not be exposed to peak sound levels
greater than 140 dB.
Minimum sound level—the lowest sampled sound level during the measurement interval
allowing for the unit’s Response Time setting (Fast or Slow).
Average sound level—(in dB) computed for a chosen time duration, based on a 4, 5, or 6 dB
exchange rate. Lavg with a 3 dB exchange rate is referred to as Leq (equivalent sound level). All
sound levels at or above the threshold level are averaged into the calculations relating to noise
exposure. Lavg is typically calculated with no threshold, with a threshold of 80 dB or with a
threshold of 90 dB.
Table 3-1: Dosimeter views and definitions
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