Abstract: A method of manufacturing a magnet system (101, 201) for an electro-acoustic transducer (100, 200) comprising a magnet element (105, 205) and at least one pole plate (106, 107, 206, 207), is described, wherein the method comprises providing the magnet element (105, 205) having a first coating layer comprising a first corrosion resistant material, providing the at least one pole plate (106, 107, 206, 207) having a second coating layer comprising a second corrosion resistant material, and connecting said magnet element (105, 205) and said at least one pole plate (106, 107, 206, 207) by fusing the first coating layer and the second coating layer.

Abstract: A MEMS microphone (100) is disclosed comprising: a substrate (101), a membrane (102) attached to the substrate (101), and an electrode (104) attached to the substrate (101), wherein the membrane (102) and the electrode (104) have the same resonance frequency.

Abstract: A transducer (1) includes a transducer axis (2), a membrane (3), a magnet system (6) having an outer magnet system part (7) and an inner magnet system part (8), a moving coil configuration (27) connected to the membrane (3) and having a coil carrier (28) and a moving coil (29) held by the coil carrier (28) in an air gap (14) between the two magnet system parts (7, 8), and guides (36) for rectilinearly guiding the moving coil configuration (27) parallel to the transducer axis (2). The moving coil configuration (27) has a cylindrical boundary surface (42) which, together with a cylindrical boundary surface (15) of the outer magnet system part (7), delimits a cylindrical gap (43) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.

Abstract: A transducer (1) with a transducer axis (2), with a membrane (3), with a magnet system (6) having an outer magnet system part (7) and an inner magnet system part (8), with a moving coil configuration (27) connected to the membrane (3) and having a coil carrier (28) and a moving coil (29) held by the coil carrier (28) in an air gap (14) between the two magnet system parts (7, 8), and with guide means (36) for a rectilinear guidance of the moving coil configuration (27) parallel to the transducer axis (2), wherein the moving coil configuration (27) has a cylindrical boundary surface (42) which together with a cylindrical boundary surface (15) of the outer magnet system part (7) delimits a cylindrical gap (43) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.

Abstract: In an apparatus (1) having an electroacoustic transducer (12) which includes a magnet system (13) generating a useful magnetic field and a stray magnetic field, a sound generating coil arranged in the useful field to associate with a diaphragm for generating an acoustic sound wave, and at least one movably mounted vibration generating coil (36, 37) arranged in the stray field area of the magnet system (13) for generating vibration perceptible by a user, the vibration generating coil (36, 37) being preferably also connected to a metal part (38) which consists of a soft-magnetic material.

Abstract: A device (8) which includes an electroacoustic transducer (7) for the acoustic reproduction of sound signals to an ear (14) of a user (2) who assumes a user position at the device. The transducer is optimized for the acoustic reproduction of speech-signal sound waves and is equipped with arrangement means (25) for realizing a distinct directivity for the speech-signal sound waves emitted by the transducer. As a result of its directivity, the transducer directs the speech-signal sound waves which it emits preferentially to the ear of a user who is in the user posture.

Abstract: A hearing/speaking configuration (1) having a housing (2), having sound-reproducing means (20) accommodated in the housing (2), and having sound-receiving means (19) designed without a boom, wherein the sound-receiving means (19) is accommodated in the housing (2), as is the sound-reproducing means (20), wherein a first sound passage opening (16) and a second sound passage opening (25) are provided in the housing (2) and the sound-receiving means (19) has a directional characteristic with a main direction (28) and an extinction direction (30), and wherein the extinction direction (30) extends from the sound-receiving means (19) to the sound-reproducing means (20).

Abstract: A hearing/speaking configuration (1) having a housing (2), having sound-reproducing means (20) accommodated in the housing (2), and having sound-receiving means (19) designed without a boom, wherein the sound-receiving means (19) is accommodated in the housing (2), as is the sound-reproducing means (20), wherein a first sound passage opening (16) and a second sound passage opening (25) are provided in the housing (2) and the sound-receiving means (19) has a directional characteristic with a main direction (28) and an extinction direction (30), and wherein the extinction direction (30) extends from the sound-receiving means (19) to the sound-reproducing means (20).

Abstract: In a device (8) which includes an electroacoustic transducer (7) for the acoustic reproduction of sound signals to an ear (14) of a user (2) who assumes a user position at the device (8), the transducer (7) is optimized for the acoustic reproduction of speech-signal sound waves and is equipped with additional means (25) for realizing a distinct directivity for the speech-signal sound waves emitted by said transducer (7) and, as a result of its directivity, the transducer (7) directs the speech-signal sound waves which it emits preferentially to the ear (14) of a user (2) who is in the user posture.

Abstract: In an apparatus (1) having an electroacoustic transducer (12) which includes a magnet system (13) which is used to realize vibration generating means (35) the vibration generating means (35) include, in addition to the magnet system (13), at least one movably mounted vibration generating coil (36, 37) arranged in the stray field area of the magnet system (13), the vibration generating coil (36, 37) being preferably also connected to a metal part (38) which consists of a soft-magnetic material.

Abstract: A pressure gradient pickup, particularly a capacitor microphone or a dynamic microphone, has a diaphragm arranged in a housing and at least one sound entry opening which conducts the sound to the rear side of the diaphragm. Acoustically acting phase-shifting sections are connected in the interior of the housing to the at least one sound entry opening. The at least one sound entry opening is located at least approximately in the same plane as the diaphragm and is preferably arranged concentrically relative to the diaphragm edge.

Abstract: The arrangement for suppressing structure-borne sounds in microphones comprises an electroacoustic transducer which substantially includes a housing part, a diaphragm firmly connected to said housing and receiving the sound, and a corresponding transducer system and in which the electroacoustic conversion of the signal is based on the relative motion between the diaphragm and the transducer system, the natural resonance as well as the logarithmic decrement of said transducer system being at least approximately equal to the natural resonance and the logarithmic decrement of the diaphragm. Microphone types include moving voice coil, electrostatic, and ribbon.