| 摘要 |
PURPOSE:To transform a pattern sound into a music from a noize by setting the total number of a lot of chord pitch elements formed on a tread part of a tire in a specified value as well as setting each pattern sound of base ribs and chord ribs in a specific consonant relation. CONSTITUTION:Each rib 4 is formed by a lot of vertical grooves 3 on a tread part 2 of a tire 4 and each base pitch element 6a is formed by a lot of horizontal grooves 5 on a base rib 4a. Each chord pitch element 6b, 6c is also formed by a lot of horizontal grooves 7, 8 on a plurality of chord ribs 4b, 4c. In this case, the total numbers of chord pitch elements 6b, 6c respectively are set in a value obtained by multiplying a value attained by putting a positive integer of 1-24 in the place of n of 2<n/12> by the total number of base pitch elements 6a and raising or omitting the resulting multiplied value. Pattern sounds of each chord ribs 4a are set in n degree of the 12 musical scale higher than a pattern sound of the base ribs 4a to be in a consonant relation with the sound of the base ribs 4a. |
