Almost all startup offices I've been in have high levels of low frequency noise. I have other headphones (including the ATH-M50s), but I've taken to using noise

Almost all startup offices I've been in have high levels of low frequency noise. I have other headphones (including the ATH-M50s), but I've taken to using noise canceling headphones more often than any of my others. You may be underestimating their benefit.