Eli5: the differences between decibels (dB) and weighted decibels (dBA)
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dB are for energy of acoustic wave. dBA are for how loud sound is. Human ear hears different frequencies with different efficiency. Mechanical/ electronic sensors give you dB. Then you put data through filter, that accounts human ear characteristics to get weighted dB. There are many filters, most popular one is A, so dB weighted through A makes dBA.
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