"In the house" doesn't tell us enough. We need to know
where in the house.tl;dr- If you want to boast how loud your band is, measure right up against the PA, rather than "out in the room somewhere", because sound level decreases rapidly with distance.http://www.sengpielaudio.com/calculator-SoundAndDistance.htm"The sound pressure decreases in inverse proportion to the distance, that is, with 1/r from the measuring point to the sound source, so that doubling of the distance decreases the sound pressure to a half (!) of its initial value"Which means in this case.. (values derived using the appropriate calculator on that webpage) :
If its 145dB one foot in front of the stack (stack humper doing the measuring)..
it will be 125dB ten feet away (tweakers by the speakers)..
119dB twenty feet away in the (up impact zone)..
113dB forty feet away (call that the SBD)..
etc..
^Granted that describes the freespace condition (such as an open air outdoor concert). In an enclosed room things behave essentially the same way up to the
critical distance, which is a measure of the distance from a source where the level of the level of direct-arriving sound equals that that of the reverberant sound, beyond which the reverberant sound dominates over direct sound and sound pressure levels off.