Tuesday evening noise pollution

First large horn honk i have done in some time, Myself and Bryan McKenzie got together to test out his new compressor and blow some horns in a spot up in the hill near his house. We changed locations twice to see where we could get the best echos.
Turn the volume up to hear them
My truck was running horns at 120 PSI @ 80 gallons
Bryans vehicle was running horns around 125 PSI @ i believe around 45 gallons.