In a discussion person A is talking 1.2 dB louder than person B, and person C is talking 3.2 dB louder than person A. What is the ratio of the sound intensity of person C to the sound intensity of person B?

Answer: 3.84dB

Explanation:

Since person A is talking 1.2dB louder than B, we will have

A = 1.2B ... (1)

Similarly, person C is talking 3.2 dB louder than person A, we have

C = 3.2A ... (2)

From equation 1, B = A/1.2 ... (3)

To get the ratio of the sound intensity of person C to the sound intensity of person B, we will divide equation 2 by 3 to give

C/B = 3.2A/{A/1.2}

C/B = 3.2A*1.2/A

C/B = 3.2*1.2

C/B = 3.84dB