So I just got the p40is and I think your testing is either flawed or the firmware update my headphones did helped with ANC. I tested frequencies from 10-500hz and I saw a huge drop in volume across them all(at least 10db if not 20db). 10hz for example i can’t even hear with the headphones ANC on with no audio playing. But your graph shows no ANC db drop below 500hz on the p40i. The earbuds are a strange oval shape on these so maybe fitment was an issue? Either way, ANC is better than the graph shows here(so long as your ear fitment is decent). For clarification I’m using auto mode so it adjusts depending on how loud the environment is with wind noise reduction enabled.
So I just got the p40is and I think your testing is either flawed or the firmware update my headphones did helped with ANC. I tested frequencies from 10-500hz and I saw a huge drop in volume across them all(at least 10db if not 20db). 10hz for example i can’t even hear with the headphones ANC on with no audio playing. But your graph shows no ANC db drop below 500hz on the p40i. The earbuds are a strange oval shape on these so maybe fitment was an issue? Either way, ANC is better than the graph shows here(so long as your ear fitment is decent). For clarification I’m using auto mode so it adjusts depending on how loud the environment is with wind noise reduction enabled.