System for analyzing sound quality in automobiles using musical intervals
US5805457A · kind A · utility
Inventor
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computer-implemented system for analyzing sound quality in automobiles includes a noise spectrum generator that generates an actual or synthetic noise spectrum representative of the noise of an automobile. A computer receives the spectrum and converts frequencies at predetermined intervals to corresponding frequency orders, relative to a fundamental frequency, e.g., the RPM of the automobile's engine. Then, each order and/or the difference between the order and one or more comparison orders is determined and correlated to a corresponding musical interval. Each interval is assigned a weighting factor, based upon its agreeability to the human ear, and the weighting factor is multiplied by the amplitude (SPL) of the order to generate a measure which represents the sound quality of the noise spectrum. The measure includes components related to roughness, dissonance, sharpness, and boom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.