18"

B A 71 dB

B B 71 dB

C A 69 dB

B B 71 dB

B A 72 dB

C A 71 dB

C B 70 dB

C A 69 dB

A C 72 dB

C A 71 dB

B A 70 dB

B B 71 dB

A A 70 dB

C A 72 dB

C A 72 dB

A A 69 dB

C B 70 dB

B B 73 dB

C B 72 dB

C A 70 dB

D B 70 dB

B C 71 dB

C B 70 dB

B B 72 dB