Appendix A Solut,ions to the Kxerrises 499 I
a) -20 - b) 20 - P ) 40 ~ t l ) n 20 -
S o l ~ t ~ o ~ 10.12
The amplification inrreases exporieritially at 40%, w h m ii: << 100 Dorrbli~rg thc frequency qriath iiplcs tbc\ amplificatioii, increasing it by 20 log 4 = 12 dB