Abstract: A dynamic loudspeaker driver comprising a magnet-system; a membrane; the membrane being movably mounted with respect to the magnet-system; at least one voice coil attached to the membrane and operatively coupled with the magnet-system, wherein the voice coil comprises an upper edge facing the membrane and a lower edge being arranged opposite the upper edge of the voice coil; at least one voice coil extension element comprising an upper surface facing the membrane and a lower surface facing the upper edge of the voice coil, wherein the lower surface of the voice coil extension element is attached the upper edge of the voice coil while the upper surface of the voice coil extension element is attached to the membrane.

Abstract: A dynamic loudspeaker driver comprising a magnet-system; a membrane; the membrane being movably mounted with respect to the magnet-system; at least one voice coil attached to the membrane and operatively coupled with the magnet-system, wherein the voice coil comprises an upper edge facing the membrane and a lower edge being arranged opposite the upper edge of the voice coil; at least one voice coil extension element comprising an upper surface facing the membrane and a lower surface facing the upper edge of the voice coil, wherein the lower surface of the voice coil extension element is attached the upper edge of the voice coil while the upper surface of the voice coil extension element is attached to the membrane.

Abstract: A new audio transducer for mobile devices having a collar with side openings that provide side venting to a back volume within an enclosure. The side openings eliminate the need for a typical frame and back vents thereon, which leads to a smaller size speaker. Each of the side openings have a maximum size less than the size of an adsorber material, which prevents the adsorber material coming into contact with the magnets, coil, and membrane of the speaker. The side openings and the size thereof also permit the enclosure to be directly filled with an adsorber material. The direct filling of the adsorber leads to more even and complete distribution of the adsorber within the back volume, which, in turn, improves sound quality of the speaker.

Abstract: A new audio transducer for mobile devices, in particular for a micro speaker, having a coil assembly having a coil, a pair of leads extending from the coil, and a flexible printed circuit having a pair of contact pads to which the leads are directly electrically connected. An advantage of this new speaker is the reduced number of electrical connections between the leads of the coil and the driver of the coil. This helps to reduce the number and size of the parts of the micro speaker and aids in increasing sound quality and durability of the speaker.

Abstract: A new audio transducer for mobile devices having a collar with side openings that provide side venting to a back volume within an enclosure. The side openings eliminate the need for a typical frame and back vents thereon, which leads to a smaller size speaker. Each of the side openings have a maximum size less than the size of an adsorber material, which prevents the adsorber material coming into contact with the magnets, coil, and membrane of the speaker. The side openings and the size thereof also permit the enclosure to be directly filled with an adsorber material. The direct filling of the adsorber leads to more even and complete distribution of the adsorber within the back volume, which, in turn, improves sound quality of the speaker.

Abstract: A loudspeaker in which a magnetic particle filter is provided in the vicinity of a sound outlet port.

Abstract: A loudspeaker in which a magnetic particle filter is provided in the vicinity of a sound outlet port.

Abstract: An acoustic transducer assembly with a basket for receiving and electrically contacting an acoustic transducer, the basket being configured to be mounted on, and electrically connected to, a platform, such as a printed circuit board, or a support or a housing. The basket may include electrical contact areas for electrically connecting the basket to the platform, and at least one mounting structure for cooperating with a platform-sided mounting structure to form a fixed mechanical connection with the platform. An electrical contact area of the basket may be integrally formed with the mounting structure of the basket.

Abstract: In a communication device (1) that is designed to deliver sound, in an against the-ear mode, into a space (22) bounded by the ear and, in an away-from-the-ear mode, into an acoustic free space, a loudspeaker (3) is provided for generating the sound and a holding device (2) is furthermore provided, which holding device (2) comprises a first holding-device region (16) via which, in the against-the-ear mode, the sound generated by the loudspeaker (3) can be delivered without hindrance by the ear and which holding device (2) comprises a second holding-device region (15A) that does not comprise the first holding-device region (16) and via which, in the against-the-ear mode, the sound generated by the loudspeaker (3) can be fed to the space (22) bounded by the ear and a first sound-conveying device is furthermore provided with whose aid the sound generated by the loudspeaker (3) can be conveyed, in the away-from-the-ear mode, through the first holding-device region (16) into the acoustic free space, and a second so

Abstract: A membrane (2) for an electroacoustic transducer (1) is disclosed, wherein a thickness (d) of said membrane (2) and an average Young's modulus (Eavg) of said membrane (2) are chosen in such a way that the critical load (Fbc), which causes the membrane (2) to buckle and/or crinkle, is increased compared to a reference membrane. The reference membrane made of Polycarbonate has the same shape, dimension, and stiffness in its direction of movement (MOV) as said membrane (2). According to the result of investigations on buckling and/or crinkling, said effect occurs with different critical buckling/crinkling loads for membranes of the same shape and dimension, but made of different materials, even when the stiffness of the membranes in their direction of movement—and hence their resonant frequency—is identical.

Abstract: In the case of an electro-acoustic apparatus (1) having a housing (2) with a housing wall (9) and having an electro-acoustic transducer (17) that is arranged facing the housing wall (9), a front chamber volume (31) that forms an acoustic spring is provided between the transducer (17) and the housing wall (9), and in the housing wall (9) a sound outlet aperture (14, 15) that preferably forms an acoustic mass is provided, wherein between the front chamber volume (31) and the sound outlet aperture (14, 15) a sound guide channel (38, 39) is provided, which forms a sufficiently large acoustic mass in order jointly with the front chamber volume (31) to achieve a satisfactory band-pass characteristic of the sound pressure frequency response of the transducer (17).

Abstract: An adapter (3, 3?, 3?) for a loudspeaker (2) is disclosed, wherein the loudspeaker (2) is provided to be used in free space. The adapter (3) comprises means to provide an acoustic impedance on the backside (b) of the loudspeaker (2) in such a way, that an adaptation of the loudspeaker function from a free-space operation mode to an on-the-car or in-the-car operation mode is achieved.

Abstract: A membrane (2) for an electroacoustic transducer (1) is disclosed, wherein a thickness (d) of said membrane (2) and an average Young's modulus (Eavg) of said membrane (2) are chosen in such a way that the critical load (Fbc), which causes the membrane (2) to buckle and/or crinkle, is increased compared to a reference membrane. The reference membrane made of Polycarbonate has the same shape, dimension, and stiffness in its direction of movement (MOV) as said membrane (2). According to the result of investigations on buckling and/or crinkling, said effect occurs with different critical buckling/crinkling loads for membranes of the same shape and dimension, but made of different materials, even when the stiffness of the membranes in their direction of movement—and hence their resonant frequency—is identical.

Abstract: An in-ear headphone (1) comprising an elastic sealing part (2) and a solid sealing part (3) for sealing an ear cavity (b) against an outside region (c) is disclosed, wherein said solid sealing part (3) comprises at least one damping vent (4) interconnecting the ear cavity (b) and the outside region (c), and wherein said damping vent (4) forms an acoustic friction.

Abstract: In an electroacoustic transducer (1), an annular shaped magnet system (14) is provided, enclosing an inner space (22), in which inner space (22) an integrated circuit (31) is accommodated, with the aid of which integrated circuit (31) an electrical signal to be sent to a moving coil (29) of transducer (1) can be amplified.

Abstract: In the case of an electro-acoustic apparatus (1) having a housing (2) with a housing wall (9) and having an electro-acoustic transducer (17) that is arranged facing the housing wall (9), a front chamber volume (31) that forms an acoustic spring is provided between the transducer (17) and the housing wall (9), and in the housing wall (9) a sound outlet aperture (14, 15) that preferably forms an acoustic mass is provided, wherein between the front chamber volume (31) and the sound outlet aperture (14, 15) a sound guide channel (38, 39) is provided, which forms a sufficiently large acoustic mass in order jointly with the front chamber volume (31) to achieve a satisfactory band-pass characteristic of the sound pressure frequency response of the transducer (17).

Abstract: A holding device (1) for holding at least two separate electroacoustic transducers (3,4) in an apparatus, which holding device has a retaining configuration (2) common to the at least two transducers (3, 4) with separate transducer accommodation spaces (15, 16) for the at least two transducers (3, 4), constructed as an aid for a joint mounting of the at least two separate tranducers (3, 4) in one apparatus.

Abstract: In a communication device (1) that is designed to deliver sound, in an againstthe-ear mode, into a space (22) bounded by the ear and, in an away-from-the-ear mode, into an acoustic free space, a loudspeaker (3) is provided for generating the sound and a holding device (2) is furthermore provided, which holding device (2) comprises a first holding-device region (16) via which, in the against-the-ear mode, the sound generated by the loudspeaker (3) can be delivered without hindrance by the ear and which holding device (2) comprises a second holding-device region (15A) that does not comprise the first holding-device region (16) and via which, in the against-the-ear mode, the sound generated by the loudspeaker (3) can be fed to the space (22) bounded by the ear and a first sound-conveying device is furthermore provided with whose aid the sound generated by the loudspeaker (3) can be conveyed, in the away-from-the-ear mode, through the first holding-device region (16) into the acoustic free space, and a second sou

Abstract: In an electroacoustic transducer (1), an annular shaped magnet system (14) is provided, enclosing an inner space (22), in which inner space (22) an integrated circuit (31) is accommodated, with the aid of which integrated circuit (31) an electrical signal to be sent to a moving coil (29) of transducer (1) can be amplified.

Abstract: An electroacoustic transducer (1) having an oscillator coil (15) which has two connecting leads (27, 28) is equipped with at least one retaining element (33, 34) for each connecting lead (27, 28), each retaining element (33, 34) being connected to a stationary component (2) of the transducer (1) and being held movable in relation to said stationary component (2), while said stationary component (2) borders a holding space (39, 40) through which a connecting lead (27, 28) being passed through.