System for testing adequacy of human hearing
US5413114A · kind A · utility
13Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Nov 29, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7257
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Multiple single-frequency tones are presented simultaneously to a subject by each of two transducers for the purpose of testing hearing. One transducer is employed to present a plurality of f.sub.1 primaries and the other transducer a plurality of f.sub.2 primaries so as to make the ratio of f.sub.2 to f.sub.1 sufficient to produce evoked distortion products by the pair. Proper selection of the frequencies prevents numerous intermodulation products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.