Phase lock evoked response audiometer
US6406439B1 · kind B1 · utility
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4References
14Claims
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Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Dec 1, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/38
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An evoked response audiometer method and apparatus in which a patient receives an auditory stimulus signal comprising a carrier frequency which is periodically amplitude modulated and frequency modulated whereby the stimulus is at least substantially frequency specific, the brain potential signals of the patient evoked by the auditory signal being sampled to determine whether phase locking to the modulated auditory signal has occurred, the auditory signal being selectively controlled to advance or delay one modulation with respect to the other modulation to cause enhancement of the evoked response to the auditory stimulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.