19"

D A 71 dB

D A 72 dB

C A 73 dB

D B 71 dB

D A 71 dB

A B 72 dB

B B 72 dB

C A 71 dB

C A 71 dB

C B 72 dB

D B 69 dB

A B 72 dB

A B 72 dB

A B 71 dB

C C 72 dB

C A 70 dB

D B 72 dB

C A 71 dB

A B 71 dB

A B 70 dB

C A 72 dB

B B 71 dB