Sounds of Silence (Almost): How and Why to Own a Suppressed Firearm and to Measure Its Effectiveness (Unabridged‪)‬

This audiobook describes reasons for owning and using a suppressed firearm, how to make a true comparison of it to an unsuppressed firearm, how to track its effectiveness over time, and how to use the same tools to calculate bullet velocity. It also lists the tools used to generate this information and how to interpret the measurements.