Intensity acoustic calibrator
US5567863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An intensity acoustic calibrator is disclosed including at least two wave guide channels. A speaker adjacent each wave guide channel emits sound to develop a standing wave pattern at the opposing end of the channel. The test microphone is positioned in the calibrator so as to be in acoustic communication with the wave guide channel so that the microphone can be calibrated respective to the standing wave pattern. By having two separate wave guide channels and speakers, the test microphones can be subjected to arbitrary magnitude changes and phase differentials. Additionally, a reference microphone may be positioned adjacent each wave guide channel to monitor the sounds generated by the speakers to ensure that the speakers are emitting sounds at the desired magnitude, phase, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.