19"

D A 72 dB

B A 72 dB

A B 69 dB

B D 71 dB

B B 71 dB

B A 72 dB

A A 69 dB

C D 71 dB

C C 72 dB

C A 72 dB

D A 73 dB

C D 72 dB

A B 70 dB

C A 72 dB

C D 72 dB

D C 74 dB

D A 71 dB

D D 71 dB

B A 69 dB