Abstract: An electroacoustic transducer of the electret type, having a backplate situated above a diaphragm, with the backplate being provided with spacers. The diaphragm is clamped on a frame-shaped carrier located at an underside of the diaphragm. The carrier is provided with supporting portions which are vertically aligned with the spacers. In one embodiment, supporting posts are formed on the supporting portions to allow the carrier to rest on a case bottom. The resulting electroacoustic transducer can be easily assembled with a reduced risk of damage.
Type:
Grant
Filed:
April 15, 1997
Date of Patent:
January 2, 2001
Assignee:
Microtronic Nederland, B.V.
Inventors:
A. Z. van Halteren, E. Wilmink, M. de Blok, O. Geschiere, J. M. van Doorn
Abstract: The invention relates to an integrated microphone/amplifier unit, in particular for a hearing aid, which is largely insensitive to interference signals such as, for instance, could be caused by GSM telephone apparatuses because capacitive couplings are arranged between the amplifier output and ground, and between the feed and ground. These capacitive couplings are made by the thick-film technique and can be provided with a separate ground connection. In one embodiment the capacitive couplings comprise capacitors, of which the output and feed connections themselves form part. In another embodiment the capacitive couplings comprise capacitors that are formed on the back of a carrier.
Type:
Grant
Filed:
April 3, 1997
Date of Patent:
July 4, 2000
Assignee:
Microtronic Nederland B.V.
Inventors:
Aart Zeger van Halteren, Engbert Wilmink
Abstract: An electroacoustic transducer having a housing with at least two parts, e.g., a cover and a bottom portion, and a diaphragm situated therein. Specifically and illustratively, an edge portion of the diaphragm is attached to one of two opposing edges of side walls of the cover and the bottom portion and, once the housing is assembled, is located between these edges. The edge to which the diaphragm is attached extends in a first plane defined by a central portion of the diaphragm or in a second plane parallel thereto.
Type:
Grant
Filed:
December 19, 1997
Date of Patent:
June 20, 2000
Assignee:
Microtronic Nederlands B.V.
Inventors:
Henk Dolleman, Onno Geschiere, Paul Christiaan Van Hal, Engbert Wilmink
Abstract: A transducer, in particular suitable for hearing aids, comprising a coil, two spaced magnet elements, a membrane, and a U-shaped armature, a first leg of the U-shaped armature extending through the coil and the two magnet elements and being coupled with the membrane by means of a connecting element, limiting means being provided for limiting the maximum deflection of the first leg of the armature, which limiting means are disposed on the connecting element.
Type:
Grant
Filed:
July 24, 1996
Date of Patent:
September 15, 1998
Assignee:
Microtronic Nederland, B.V.
Inventors:
Aart Zeger van Halteren, Onno Geschiere
Abstract: A transducer, in particular suitable for hearing aids, comprising a coil, two spaced magnet elements, a membrane, and an E-shaped armature, a middle leg of the E-shaped armature extending through the coil and the two magnet elements and being coupled with the membrane by means of a connecting element, limiting means being provided for limiting the maximum deflection of the middle leg of the E-shaped armature, which limiting means cooperate with the end of the middle leg of the E-shaped armature.