초록 ▼

A device (10) and embodied method for producing pneumatic tires having preselected noise characteristics includes an output spectrum generator (11) for generating those noise characteristics, a fast Fourier transformer (12) for generating the periodic function which yields the desired noise characte

A device (10) and embodied method for producing pneumatic tires having preselected noise characteristics includes an output spectrum generator (11) for generating those noise characteristics, a fast Fourier transformer (12) for generating the periodic function which yields the desired noise characteristics, and a processing circuit (13). Processing circuit (13) substantially proportionally adjusts the magnitude of this periodic function such that its relative amplitude at various points in time throughout one period is directly substantially proportional to the length (L1 . . . L8) of individual tread pitch elements (P1 . . . P8) at similarly spaced locations along the tire circumference, all as may be embodied in a pneumatic tire produced in accordance with the described method.

대표청구항 ▼

A device for producing a design element pattern of a preselected total length for a load supporting apparatus, the apparatus having a preselected, periodic audio frequency spectrum signal, the design element pattern including a plurality of individual design elements of varying lengths, the device c

A device for producing a design element pattern of a preselected total length for a load supporting apparatus, the apparatus having a preselected, periodic audio frequency spectrum signal, the design element pattern including a plurality of individual design elements of varying lengths, the device comprising: means for generating the preselected audio frequency spectrum signal; means receiving the preselected, periodic audio frequency spectrum signal and generating an inverse Fourier transform signal thereof; and, circuit means receiving said inverse Fourier transform signal and generating a periodic signal the period of which is substantially proportional to the preselected total length for the design element pattern and the relative amplitude of which at various points in time throughout one period is substantially proportional to the length of the individual design elements at similarly spaced locations over the preselected total length for the design element pattern.