18"

C D 72 dB

C A 73 dB

B A 70 dB

C D 71 dB

C A 70 dB

B A 70 dB

B A 71 dB

B D 69 dB

B A 70 dB

B D 72 dB

B A 69 dB

C E 72 dB

C B 71 dB

C B 70 dB

D A 74 dB

D E 71 dB

D A 70 dB

C A 71 dB