3M eg3 Benutzerhandbuch

eg4 & eg3 

 

19 

 

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 “Dosimeter measurement 
descriptors/variants” in 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. L

AVG

 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. L

AVG

 is typically calculated with no threshold, with a threshold of 

80 dB or with a threshold of 90 dB.