Active noise reduction for audiometry
US6396930B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Feb 20, 1998 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/121
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The technology of active noise reduction (ANR) is incorporated into audiometry testing in a variety of formats. Analog feedback, digital feedback, adaptive feedforward, and adaptive feedback noise control schemes are presented for use in audiometry to reduce the ambient noise heard by the test subject, allowing subject testing in higher ambient noise fields. Audiometer test signals are appropriately compensated so the test results are accurate and comply with existing calibration standards for audiometers. Existing audiometry headphone technologies are modified so that ANR can be accomplished while satisfying existing standards for audiometric testing. Embodiments are also defined for alternate headphone arrangements that may not conform to current (1997) audiometric testing standards but provide sufficient performance advantages to warrant new standards for audiometry testing in the future.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.