Software for calculating the effects of using different hearing protectors based on frequency spectra from Nor131/Nor132 and Nor140.



  • A large database containing data for the most popular used hearing protectors are included. Hearing protectors not listed in the database can easily be added by the user. The measurements are transferred from the sound level meter to the program using Nor1020 NorXfer software.
  • The Nor1025 NorProtector software calculates all the required results for the noise deafness risk assessments. With a quick drag and drop operation all measurements from most Norsonic sound level meters are imported. The user only needs to specify the duration of work at each position, and the values exceeding the action level turns out in coloured cell boxes. Individual data for each person may be entered.
NorProtector screenshot details


  • Application note: Noise at Work