Treatment of a small boxy room - REW file attached
Posted: Wed, 2023-Jan-04, 15:44
In further praise of soda bottles, and just for the sake of wasting time, I did a measurement with a 2L bottle (the other one is 500ml).
The resonant frequency should be inversely proportional to the square root of the volume, and voila:
Interestingly, running an RTA with 1/48 octave bins while blowing across the two bottles gives peak frequencies of exactly 100 and 200Hz, respectively. The resonance points seen in the REW curves seem to occur at slightly higher frequencies. Not sure why that might be so (nor the exact band frequencies used for 1/48 octave RTA - maybe it's a resolution thing).
So clearly there is a regime where the physics of this works predictably, and yields tangible effects that can be measured. Now if only I could bridge the gap with my MDF boxes...
The resonant frequency should be inversely proportional to the square root of the volume, and voila:
Interestingly, running an RTA with 1/48 octave bins while blowing across the two bottles gives peak frequencies of exactly 100 and 200Hz, respectively. The resonance points seen in the REW curves seem to occur at slightly higher frequencies. Not sure why that might be so (nor the exact band frequencies used for 1/48 octave RTA - maybe it's a resolution thing).
So clearly there is a regime where the physics of this works predictably, and yields tangible effects that can be measured. Now if only I could bridge the gap with my MDF boxes...