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  1. 11 : 15

  2. 15 : 11

  3. 15 : 16

  4. 16 : 11

  5. 16 : 15

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Y. Maghfirah

Master Teacher

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straight R subscript straight A equals space 800 space straight m  straight R subscript straight B space equals space 400 space straight m  straight I subscript straight A space equals 10 to the power of negative 3 end exponent straight W divided by straight m squared  Taraf space intensitas space di space straight A colon  TI subscript straight A equals 10 space log 10 to the power of negative 3 end exponent over 10 to the power of negative 12 end exponent  TI subscript straight A equals space 90 space dB  maka space colon  TI subscript straight B equals TI subscript straight A minus 20 space log straight R subscript straight B over straight R subscript straight A  TI subscript straight B minus TI subscript straight A equals negative 20 space log 400 over 800  TI subscript straight B minus TI subscript straight A equals negative 20 space log space 2 to the power of negative 1 end exponent  TI subscript straight B minus TI subscript straight A equals 20 space open parentheses 0 comma 3 close parentheses  TI subscript straight B minus TI subscript straight A equals 6  sehingga colon  TI subscript straight B equals TI subscript straight A plus 6  TI subscript straight B equals 90 plus 6 equals space 96 space dB  dengan space menggunakan space perbandingan comma space maka space didapatkan colon  TI subscript straight A over TI subscript straight B equals 90 over 96  TI subscript straight A over TI subscript straight B equals 15 over 16

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