Originally Posted by Kain
Would you say a 105 dB peak at the MLP in a large room will sound the same as a 105 dB peak at the MLP in a small room?
I think we would want to make a distinction between what is a large room compared to a small room, but I would absolutely expect it to sound different. A couple things are happening. First, we have the dissipation from the air, which is actually two components, comprising the damping of SPL over distance along with the attenuation/dissipation of frequencies. The first is non-frequency dependent while the second case is. In small rooms, we are also dealing with a very different acoustical energy with all of the shorter reflection times which affect decay rate, and our brain knows the difference.
So if we are talking about sound with a large spectral component, say generated noise or music/movies, I would expect to hear a substantial difference between rooms of greatly differing size, acoustical treatments, quantity of large salt water based absorbers (humans), seats etc. The concert hall where I was the Technical Director for 12 years was designed to have periaktoi built into the walls so panels with different acoustical properties could be configured quickly for different shows (symphony, organ, plays, concerts, spoken word etc), as well as seats designed to be acoustically similar to a body if a show was lightly attended.
So yes, spectrally I would expect to hear a difference, and our earsbrain will recognize large vs small, but 105dB is 105dB, so I don't think it would sound louder or quieter.