Spreading noise generated by load supporting elements
US4327792A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Jan 25, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C11/11
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Noise generated by load supporting elements of an apparatus (e.g., tread of a tire) having a plurality of repeating design cycles is spread over a broad frequency spectrum. This is accomplished by designing load bearing elements in accordance with the following procedure. First, determining the maximum number of repeating design cycles which may be placed about the apparatus; Second, selecting a maximum pitch ratio; Third, determining the appropriate number of harmonic segments into which the apparatus can be divided; Fourth, determining the size of each of the harmonic segments and the number of design cycles for each of the harmonic segments; Fifth, arranging the various design cycles in each of the harmonic segments so that the wave length of the predominant modulation frequency of the segment corresponds to the fundamental length of that segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.