A noise reduction system in a vertical takeoff and landing (VTOL) vehicle comprising a plurality of vehicle lifter motors and a lifter motor controller for the vehicle lifter motors, the noise reduction system comprising a controller configured to: identify a VTOL noise level at which the VTOL vehicle can operate at a specific geographical location to not cause a total noise level at the geographical location to exceed a predetermined threshold noise level; retrieve vehicle lifter motor parameters comprising a battery status for the plurality of vehicle lifter motors on the VTOL vehicle , the battery status comprising battery charge, battery temperature and battery discharge rates over a calculated flight envelope for each of the plurality of vehicle lifter motors, and a fan status for the plurality of vehicle lifter motors on the VTOL vehicle; and dynamically determine, for the plurality of vehicle lifter motors, a motor-specific fan RPM and a motor-specific fan pitch that will allow the VTOL vehicle to achieve sufficient lift and not exceed the identified VTOL noise level at the specific geographical location based on VTOL vehicle noise characteristics for the VTOL vehicle and an ambient noise level measured at the geographical location and the retrieved vehicle lifter motor parameters; determine whether the determined motor-specific fan RPM and motor-specific fan pitch for the plurality of vehicle lifter motors will allow the VTOL vehicle to operate within its safety envelope; and cause a motor-specific fan RPM command and a motor-specific fan pitch command to be sent to the lifter motor controller to cause the vehicle lifter motors to operate at the determined motor-specific fan RPM and motor-specific fan pitch for the lifter motor at the specific geographical location when it is determined that the determined motor-specific fan RPM and motor-specific fan pitch for the plurality of vehicle lifter motors will allow the VTOL vehicle to operate within its safety envelope. identify a VTOL noise level at which the VTOL vehicle can operate at a specific geographical location to not cause a total noise level at the geographical location to exceed a predetermined threshold noise level; retrieve vehicle lifter motor parameters comprising a battery status for the plurality of vehicle lifter motors on the VTOL vehicle , the battery status comprising battery charge, battery temperature and battery discharge rates over a calculated flight envelope for each of the plurality of vehicle lifter motors, and a fan status for the plurality of vehicle lifter motors on the VTOL vehicle; and dynamically determine, for the plurality of vehicle lifter motors, a motor-specific fan RPM and a motor-specific fan pitch that will allow the VTOL vehicle to achieve sufficient lift and not exceed the identified VTOL noise level at the specific geographical location based on VTOL vehicle noise characteristics for the VTOL vehicle and an ambient noise level measured at the geographical location and the retrieved vehicle lifter motor parameters; determine whether the determined motor-specific fan RPM and motor-specific fan pitch for the plurality of vehicle lifter motors will allow the VTOL vehicle to operate within its safety envelope; and cause a motor-specific fan RPM command and a motor-specific fan pitch command to be sent to the lifter motor controller to cause the vehicle lifter motors to operate at the determined motor-specific fan RPM and motor-specific fan pitch for the lifter motor at the specific geographical location when it is determined that the determined motor-specific fan RPM and motor-specific fan pitch for the plurality of vehicle lifter motors will allow the VTOL vehicle to operate within its safety envelope. <EOS>