Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Private
Flight Crew Last 90 Days 5.7; Flight Crew Total 691; Flight Crew Type 50
Situational Awareness; Communication Breakdown
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Called landing intentions on CTAF frequency on approach to airport and prior to entering traffic pattern. No other traffic heard. On downwind leg; observed another aircraft nearby flying  approximately same heading but heard nothing on radio. I called my position and intentions on my radio but heard no response. I watched other aircraft continue on course and I landed after flying base and final legs of the pattern and calling my position on the radio. While taxiing on ground after landing; discovered volume of my radio was turned down. Turned volume up and heard the other aircraft calling landing intentions at the airport. They had apparently been flying the pattern too; and extended their downwind while I landed.Factors involved were my inadvertently turning volume down too far; and distraction of passengers (the radio was active with lots of faraway traffic and passenger asked question; so I turned radio volume down to hear better). As a side note; did not see a traffic alert on ADS-B (Automatic Dependent Surveillance - Broadcast); suggesting other aircraft was not ADS-B equipped.
GA pilot reported a NMAC on approach stating they did not hearing hear other aircraft but upon landing realized their volume was turned down.