Method for acoustically influencing toothed wheels (11, 12) comprising an assembly having at least one first toothed wheel with teeth and a second toothed wheel with teeth, wherein the teeth have flanks, and wherein at least one flank of a tooth of the first toothed wheel can be engaged with a flank of a tooth of the second toothed wheel, comprising the steps of: a) providing the assembly, b) carrying out an angle-resolving scattered light method to determine a macroundulation or macrotopography and a microundulation or microtopography of a surface of the at least one flank of the tooth of the first toothed wheel, c) determining a variation in a microangle distribution A q of the at least one flank of the tooth of the first toothed wheel as a measure of a microstructure and thus determining a condition of the surface of the at least one flank of the tooth of the first toothed wheel, d) representing the condition of the surface of the at least one flank of the tooth of the first toothed wheel in a false colour image and overlaying a contact zone or contact line between the at least one flank of the tooth of the first toothed wheel and the at least one engaging flank of the tooth of the second toothed wheel, e) determining an acoustic angle α Aq relevant to the microangle distribution between a preferred direction created by the machining and the contact zone or contact line between the at least one flank of the tooth of the first toothed wheel and the at least one engaging flank of the tooth of the second toothed wheel, f) grinding the surface of the at least one flank of the tooth of the first toothed wheel based on process variables, in particular a setting of an interleaving and/or a setting of a crowning, in particular a height crowning and/or a width crowning, and thus final machining of the contact line or contact zone between the flank of the tooth of the first toothed wheel and the flank of the tooth of the second toothed wheel, wherein the surface is ground in such a way that the contact line or contact zone is formed at an acoustic angle of between 5° and 85° or between 95° and 175°, in relation to an axis of an undulation of the engaging flank of the tooth of the second toothed wheel and/or the flank of the tooth of the first toothed wheel in which flank of the tooth of the second toothed wheel engages, g) providing the assembly having the at least one ground flank of the tooth of the first toothed wheel in a transmission, starting up the transmission. a) providing the assembly, b) carrying out an angle-resolving scattered light method to determine a macroundulation or macrotopography and a microundulation or microtopography of a surface of the at least one flank of the tooth of the first toothed wheel, c) determining a variation in a microangle distribution A q of the at least one flank of the tooth of the first toothed wheel as a measure of a microstructure and thus determining a condition of the surface of the at least one flank of the tooth of the first toothed wheel, d) representing the condition of the surface of the at least one flank of the tooth of the first toothed wheel in a false colour image and overlaying a contact zone or contact line between the at least one flank of the tooth of the first toothed wheel and the at least one engaging flank of the tooth of the second toothed wheel, e) determining an acoustic angle α Aq relevant to the microangle distribution between a preferred direction created by the machining and the contact zone or contact line between the at least one flank of the tooth of the first toothed wheel and the at least one engaging flank of the tooth of the second toothed wheel, f) grinding the surface of the at least one flank of the tooth of the first toothed wheel based on process variables, in particular a setting of an interleaving and/or a setting of a crowning, in particular a height crowning and/or a width crowning, and thus final machining of the contact line or contact zone between the flank of the tooth of the first toothed wheel and the flank of the tooth of the second toothed wheel, wherein the surface is ground in such a way that the contact line or contact zone is formed at an acoustic angle of between 5° and 85° or between 95° and 175°, in relation to an axis of an undulation of the engaging flank of the tooth of the second toothed wheel and/or the flank of the tooth of the first toothed wheel in which flank of the tooth of the second toothed wheel engages, g) providing the assembly having the at least one ground flank of the tooth of the first toothed wheel in a transmission, starting up the transmission.