| 摘要 |
<p>PURPOSE: A directivity auto control hearing aid for improving sound and an automatically controlling method are provided to automatically enhance directivity by controlling each of the amplification degree and delay time of several acoustic signals generated from several microphones. CONSTITUTION: A directivity auto control hearing aid(10) comprises several microphones(M1-M4), several A/D converters(AD1-AD4), several input amplifiers(G1-G4), and at least one of a delay unit(D2-D3). The directivity auto control hearing aid comprises at least one subtractor(DF2-DF3), a first and a second(B1,B2), a power amplifier(GF), a D/A converter(DA), and a receiver(RV). Several microphones disperse into the outside of hearing aid to get sounds input from different locations. Several input amplifier digital signals are amplified. [Reference numerals] (AA) Directivity controller; (B1,B2) Buffer; (BB) Receiver; (D2,D3,D4) Delay device</p> |
