How Does the Loudness Change When Two Jets Fly Together?

[kanha]

please reply me
i have a doubt. if two jet planes are flying together each producing 130 db sound. then what is the level of loudness heared by a person standing there. no other parameters are known. I have two concepts in mind ie) 1. every fundamental frequency produce hormonics and when two similar sin waves travel together they form a single sin wave. 120 db sound is threshold of pain.i don't know whether this concept is useful or some another concept is there please explan it.
thanks in advance

 

[AtticusFinch]

two similar sin waves travel together they form a single sin wave

What you are talking about is interference. Due to lack of information you can't really use that in this problem.

Decibels is the logarithmic scale of intensity. If you put two planes together (ignoring interference) the intensity at any point will double. How will that affect the decibel reading?

Hint: The dB reading doesn't double.