Sepuluh sumber bunyi Identik menghasilkanvtaraf itensitas 40 dB . brfa taraf itensitas bunyi yg dihasilkan 100 sumber buxi identik tsb yg dibunyikan brsama sama
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Cari dulu (TI) : TI = TIn - 10.log n = 40 - 10.log 10 = 30 dB
baru cari (TI 100) : TIn = 30 + 10.log 100 = 30 + 10.2 = 50 dB
TI = TIn - 10.log n = 40 - 10.log 10 = 30 dB
baru cari (TI 100) :
TIn = 30 + 10.log 100 = 30 + 10.2 = 50 dB