19"

C E 69 dB

A B 71 dB

A B 69 dB

C A 72 dB

A B 72 dB

C A 70 dB

C A 71 dB

B A 73 dB

C A 73 dB

B B 72 dB

A A 69 dB

B B 72 dB

B E 70 dB

B A 69 dB

C B 73 dB

C A 71 dB

A B 72 dB

B A 70 dB

A A 72 dB

B B 73 dB

D C 73 dB

A B 71 dB