Help i will give brainest

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Can someone me and do the problem plz so i can understand it more better

Factor the polynomial. b^2 + 4b + 4