Marina Board Exam: A bell or a gong, or other device having similar sound characteristics and at a distance of one meter from it, shall produce a sound pressure level of:

Marina Board Exam

A bell or a gong, or other device having similar sound characteristics and at a distance of one meter from it, shall produce a sound pressure level of: 

A. not less than 110 dB 
B. not more than 210 dB 
C. at least 160 dB 
D. not less than 220 dB 


Answer:  A.  not less than 110 dB