Patent ID: 8414502

Claim:
A system for determining a hearing ability of an individual, comprising a generator for generating a test stimulus signal, a hearing aid of a type selected from the group consisting of a behind-the-ear hearing aid, an in-the-ear hearing aid and a completely-in-the-canal hearing aid, said hearing aid having a digital signal processor for processing and converting said test stimulus signal in order to output an acoustic stimulus signal, and a first synchronizing means for emitting a synchronization signal, and an electrophysiological instrument, said instrument having a second synchronizing means and means for establishing from said individual an evoked, electrophysiological response to said acoustic stimulus signal, wherein said hearing aid is adapted to operate with an essentially constant time delay between emitting said synchronization signal and outputting said acoustic stimulus signal, and wherein said first synchronizing means and said second synchronizing means are adapted to exchange said synchronization signal in order to synchronize said evoked response to said acoustic stimulus signal, the synchronization of the signal relating an evoked response from the individual in response to the acoustic stimulus signal emitted from the hearing aid.