Microphone for use as a directional microphone has integrated pre-amplifier switching circuit fitted directly on surface of rear side face facing back plate electrode
NL1015222C2
System consisting of a microphone and an amplifier.
NL1012208C1
Coil construction for an electroacoustic transducer.
NL1012207C1
Assembly of an armature and magnetic elements for an electroacoustic transducer.
NL1011778C1
Microphone for a hearing aid and a hearing aid provided with such a microphone.
NL1011733C1
Electroacoustic transducer with a membrane and method for mounting a membrane in such a transducer.
NL1009544C2
System consisting of a microphone and a preamp.
NL1007858C2
Directional hearing aid.
NL1004877A1
Electroacoustic transducer.
NL1004669C2
Transducer.
NL1002880C2
Electroacoustic transducer.
NL1002783C2
Integrated microphone / amplifier unit, and amplifier module therefor.