Simply replace the unfilled areas such as "" and "[date]" with your information.
We are writing to request that you please try to keep some of the noise that occurs on your property in the very late hours of the night down. Specifically, we would like to request that you stop [name of noisy activity] between the hours of 10:00 p.m. and 6:00 a.m.
The amount of noise, and the length of time it regularly occurs, is very disruptive to our entire home. We do not want to take any further action regarding this, as we value an amicable relationship with all our neighbors. However, it the noise issue is not resolved, we may be forced to make an official complaint of disruption.