In Man of Steel, when Clark and General Zod fight! Clark lets out an almighty scream with what seems to be all of his strength.
We know that Superman has a lot of powers that are far more powerful than humans. Below is a quote from the wiki article about the Man Of Steel Novel
Ma and Pa Kent bring a six-month-old Kal/Clark to the doctor. The growing baby couldn't stop crying, and the Kents, trying to find out what was wrong, brought him to get examined. Believing Clark to be suffering from colic, the doctor administers a hearing test, and Clark proceeds to scream so loud that he blows out the glass elements not just in the doctor's office, but in the windshields and storefront windows across town. "It was a funny scene but we decided not to keep it in," Goyer said
So we can assume he has this ability in the movie.
Sound is dangerous and kill if loud enough. (see "Can a loud enough sound kill you?"
The question is, is 154 decibels enough to kill you? In all honesty, probably not — unless, perhaps, you were stuck with your head inside the horn for a prolonged period. 150 decibels is usually considered enough to burst your eardrums, but the threshold for death is usually pegged at around 185-200 dB.
For one, we see Lois on the staircase, at what I would estimate to be about 80ft from Superman.
Using this formula,
SPL = (source SPL)-(20*LOG10(Distance from source)) for measuring diminishing sound over distance, you can calculate that Superman would have to have made a 208 dB scream , which over 80 ft would mean the SPL level would be about 180 dB's @ 80ft.
It is in the realm of possibility that he can make a 208 dB sound, and that making a sound that loud via a scream would in fact kill or maim anyone in close proximity to him.
Wouldn't this scream have killed or maimed all the people in close proximity to Clark?