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US 6,272,229 B1Granted
Hearing aid with adaptive matching of microphones
AssigneeTopholm & Westermann ApS
InventorLars Baekgaard
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AssigneeTopholm & Westermann ApS
InventorLars Baekgaard
Estimating the term…
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.
Hearing aid with a controllable directional characteristic, having at least two spaced apart microphones (Mic1, Mic2) in at least two microphone channels, at least one signal processing unit, at least one output transducer and a directional controlling system, with means of adaptively matching the characteristics of at least two microphones, characterized by an adaptive phase matching circuit (1) with input terminals (a, b) and output terminals (c, d) and inserted into said at least two microphone channels, the adaptive phase matching circuit (1) having its outputs (c, d) 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.
Method of operation of a hearing aid with a controllable directional characteristic having at least two spaced apart microphones in at least two microphone channels, at least on signal processing unit, at least one output transducer and a directional control system as well as means for adaptively matching the phase of said at least two microphones, by applying the output signals of said adaptive phase matching circuit to an acoustical delay compensation means for determining a parameter control value for controlling controllable filter means inserted into at least one of said at least two microphone channels inside of said same adaptive phase matching circuit.
Dependencies are inferred from the claim text.