Is it possible to have a negative sound intensity level? A sound that is below the threshold of human hearing has...... (A) a negative intensity level (in dB). (B) a negative intensity (in W/m^2 ). (C) an intensity level of zero. (D)an intensity level less than 1 dB , but greater than 0. I think I know the answer but I don't want to guess wrong and lose points. Does it have to do with anything like I/Io or I=power/area ?? I think the answers is A or B..but I don't see the difference in between dB and W/m^2 i thought they are the same thing.