18"

D E 72 dB

A D 69 dB

B A 71 dB

C D 72 dB

C A 71 dB

B A 69 dB

A B 70 dB

C A 70 dB

D A 71 dB

D B 73 dB

C E 72 dB

C D 72 dB

B A 70 dB

B A 70 dB

C B 71 dB

E E 72 dB