thresholds the parameters and or thresholds may be included in the data 606 of fig6 if the determination of block 702 indicates operation in the high power state flow may proceed from block 702 to block 704 otherwise the operation is in the low power state and flow may proceed from block 702 to block 706 in block 704 a valve e g valve 432 of fig4 may be opened or remain open to provide for a uniform symmetric flow of fuel in block 706 a valve e g valve 432 of fig4 may be closed or remain closed to provide for a non uniform asymmetric flow of fuel technical effects and benefits of this disclosure include a selective control and distribution of fuel to nozzles of an aircraft the control exerted over the distribution of the fuel may be used to reduce a level of noise that is output by the aircraft or an associated device component as a rough order of magnitude the noise may be reduced on the order of approximately 20 db in some embodiments via incorporation of the techniques that are described herein furthermore the control exerted over the distribution of fuel may improve or enhance engine stability particularly under low power or low fuel flow conditions by enhancing or enriching a subset of nozzles in terms of fuel availability output aspects of the disclosure have been described in.