Sound pressure level meter
US4257273A · kind A · utility
20Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Jul 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sound pressure level meter adapted for use in monitoring noise levels, particularly for use by law enforcement agencies wherein the device includes means for providing a logarithmic indication of the root mean square value of ambient sound pressure levels and wherein means are provided for holding and displaying a maximum sound pressure level detected over a given period of time and for providing an alarm when a detected level exceeds a predetermined threshold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.