This android-based application was developed as one software that can be used by industrial hygienists. This application is accurate and easy to use anywhere even you are offline. This noise calculator consists of
1. dB calculator; for addition and subtraction of decibels
2. Average calculator; for calculate the average noise level (in decibels)
3. SPL distance calculator; to calculate the exact sound level at any distance from the source or otherwise
4. Permissible noise exposure; to calculate permissible exposure time or permissible noise level according to OSHA/MSHA (Criterion Level 90 dB; Exchange Rate 5 dB) and NIOSH/ACGIH (Criterion Level 85 dB; Exchange Rate 3 dB)