System and method of measuring noise of mobile body using a plurality microphones
US6094150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Aug 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a noise measuring system comprising a microphone array and a directivity forming section for controlling the direction of directivity of the microphone array, the directivity forming section includes delay section and adding section, and the optimal value of a delay time of the delay section is set in such a manner that a noise isolation characteristic for causing any mobile noise generator not targeted for noise measurement to come off a directional plane or a directional line formed in the direction of directivity of the microphone array and a deterioration characteristic of the directivity of the microphone array balance with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.