| 摘要 |
Hearing aid with a controllable directional characteristic having at least two spaced apart microphones (Mic 1, Mic 2) in at least two microphone channels, at least one signal processing unit, at least one output transducer and a directional controlling system, with means for adaptively matching the characteristics of at least two microphones. This novel hearing aid comprises an adaptive phase matching circuit (1), inserted into said at least two microphone channels, the adaptive phase matching circuit, (1) having its outputs connected to an acoustical delay compensation means (2), followed by a parameter control circuit (3), the output of which is applied to a controllable filter means (4) inserted into at least one of said at least two microphone channels inside said adaptive phase matching circuit. Preferably filter means (5, 6) are provided in front of said acoustical delay compensation means (2), which could be used to eliminate DC components. |
