I discovered mynoise.net some years ago. As I lived near a church where the bells would be active every 15 minutes... It really helped to not listen to them.
The downside: the alarm clock was also less audible in the morning! :D
I'm surprised there's any churches left still doing that frequency. Is it a touristy thing or something? Definitely would have thought most at this point are down to hourly or even just once at noon, with an awful lot more silent but for special occasions like weddings.
It seems to be pretty common in Washington, DC. Offhand, I can think of St. John's Episcopal at 16th & H Sts. NW, St. Matthew's [Catholic] Cathedral on the 1700 block of Rhode Island Avenue NW. I think that the First Presbyterian Church at 16th & Kennedy NW does. All this is from just my regular commuting or running routes, so I suspect one can find quite a few more examples.
The downside: the alarm clock was also less audible in the morning! :D