I have a calibrated SPL meter, cell phones don't have the dynamic range or frequency response to conduct SAE J986 or SAE J1970. Any cop that gives you a ticket for any exhaust related issue when your exhaust is reasonable is an effing moron. They are disrespecting the crown's time and position, I'd hope that they didn't show up to defend their position for their sake more than anything.
2011 Nissan Sentra SE-R Spec-V
Amsoil Air Filter, Engine Oil, Transmission Oil and Coolant Boost
"The beauty of understeer is that whatever you are currently doing, do less of it."