Imagine a choir of 10 singers, all of different frequencies, but each singing at the same decibel level β if heard
separately. Suddenly one gets bashful and stops singing. By how many decibels does the sound of the full choir drop?
I = I1 +I2 + I3 ...
β = 10log10(I/Io)
Io = 1.0 * 10^-2
The Attempt at a Solution
can i just call the combined decibel level of 10 singers x
x = 10log10(10I/(10^-2)
then call the combined decibel level of 9 singers y
y = 10log10(9I/10^-2)
then subtract them, i have a feeling there is not enough information to solve this :(