19"

A B 71 dB

C B 71 dB

B B 73 dB

B B 71 dB

A A 70 dB

B A 72 dB

C A 72 dB

C B 70 dB

A D 69 dB

C B 71 dB

D A 71 dB

B B 70 dB

D A 73 dB

C B 72 dB

C B 68 dB

B D 69 dB

D A 73 dB

B A 72 dB

D A 73 dB

D A 73 dB

C B 72 dB