| 摘要 |
A hearing aid (21) is devised, comprising a first output converter (26), a second output converter (27), a first acoustic output transducer (34) and at least a second output transducer (35). The first output converter (26) and the first output transducer (34) are configured to reproduce the high frequencies of the processed signals, and the second output converter (27) and the second output transducer (35) are configured to reproduce the low frequencies of the processed signals. The output converters (26, 27) may preferably be embodied as direct digital drive output converters. |
| 主权项 |
1. A hearing aid comprising
a microphone, an input converter for receiving signals from the microphone, a signal processor, a first output converter, a second output converter, said first output converter and said second output converter being embodied as respective direct digital drive output amplifiers, a first acoustic output transducer and a second acoustic output transducer, said signal processor being adapted for processing signals from the input converter in order to compensate for a hearing impairment and generate processed signals to feed as respective outputs to said first output converter and said second output converter, wherein
said first output converter and said first output transducer are configured to reproduce the high frequencies of the processed signals,said second output converter and said second output transducer are configured to reproduce the low frequencies of the processed signals, andsaid signal processor has a frequency selection component operable on said processed signals to split the processed signals into first and second digital outputs according to a cross-over frequency tuned by programming and feeding the first and the second output amplifier, respectively. |
