Pada jarak 3 meter dari sumber ledakan terdengar bunyi dengan taraf intesitas 50 dB tentukan taraf intesitasnya pada jarak 50 meter dari sumber ledakan tersebut

Question

05-09-2017
Physics

contestada

Pada jarak 3 meter dari sumber ledakan terdengar bunyi dengan taraf intesitas 50 dB tentukan taraf intesitasnya pada jarak 50 meter dari sumber ledakan tersebut

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andriansp andriansp · Answer 1 · 2017-09-14T16:22:24+02:00

Penghitungan intensitas suara dengan satuan desibel menggunakan rumus "10 log x" yang berarti setiap 10 desibel akan menghasilnya bunyi dengan intensitas 10x lipat, 20 desibel = 100 kali lipat, dan seterusnya. Rumus yang dipakai untuk soal ini adalah:

TI2 = TI1 − 10 log ( r2/r1 )2
Intensitas suara 2= intensitas suara 1 + 10 log (lokasi 2/lokasi 1)
Intensitas suara 2= 50dB + 10 log 50m/3m = 50db + 10 log 16.7= 62.21dB