Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Nxp B.v.

Sound Solutions International Company, Ltd.

Knowles Ipc (m) Sdn. Bhd.

Erich Klein

Ewald Frasl

Ernst Ruberl

Michael Schoeffmann

Ernst Tomas

Peter Bleim

Susanne Windischberger

Heinz Renner

Franz Heidinger

Heribert Bauer

Heinz Nierlich

Thomas Pauser

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.

Coil extension element

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.

Electroacoustic transducer

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

Loudspeaker with port comprising a particle filter

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

Communication device comprising sound-conveying means for two sound-producing modes

A membrane () for an electroacoustic transducer () is disclosed, wherein a thickness (d) of said membrane () and an average Young's modulus (Eavg) of said membrane () are chosen in such a way that the critical load (Fbc), which causes the membrane () 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 (). 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&#x2014;and hence their resonant frequency&#x2014;is identical.

Membrane with a high resistance against buckling and/or crinkling

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

Electro-acoustic apparatus comprising an electro-acoustic transducer

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

Electroacoustic transducer with built in transducer circuit

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

Electroacoustic transducer having a moving coil and having movable holding elements for the connecting leads of the moving coil

A device ( ) which includes an electroacoustic transducer ( ) for the acoustic reproduction of sound signals to an ear ( ) of a user ( ) 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 ( ) 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.

Device including a built-in electroacoustic transducer for optimum speech reproduction

In an apparatus ( ) having a housing ( ) with a first housing wall ( ) and having a printed circuit board ( ) which extends parallel to the first housing wall ( ), an electroacoustic transducer ( ) is mounted on the printed circuit board ( ) with the aid of a holder ( ), the holder ( ) being mounted so as to be movable transversely with respect to the printed circuit board ( ) and a spring device ( ) being provided to urge the holder ( ) together with the transducer ( ) towards the first housing wall ( ) under a spring load, and a part of the holder ( ), at the same time, forming a sealing device( ), which guarantees a nominal isolation between the front ( ) and the rear ( of the transducer ( ).

Apparatus having an electroacoustic transducer mounted on a p.c. board with the aid of a holding means

In an adapted to be used in an on-ear mode and in an off-ear mode a holder compartment ( )accommodates a first transducer ( )and a second transducer ( )and the holder compartment ( )is bounded by a bounding wall ( )formed with internal sound ports ( )and at least one additional internal sound port ( ), and an outer wall ( )formed with external sound ports ( )is spaced at a distance from the bounding wall ( ), and at least one additional external sound port ( )is provided between the bounding wall ( )and the outer wall ( ), and the two transducers ( )can be driven with useful signals of the same phase in the off-ear mode and with useful signals of opposite phase in the on-ear mode.

Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers

In an apparatus ( ) having a housing ( ) and having an electroacoustic transducer ( ) accommodated in the inner housing space ( ) and having at least one passage ( ) which traverses a housing wall ( ) and which, together with the inner housing space ( ) and the rear volume ( ) of the transducer ( ), which rear volume ( ) is open to the inner housing space ( ), forms an absorption-circuit resonator which causes a dip ( ) in the sound pressure versus frequency response( ), a compensator ( ) for the compensation of the dip ( ) in the sound pressure versus frequency response ( ) is provided and includes the housing ( ) being provided with a plurality of ducts ( ) traversing the housing ( ), each duct forming an acoustic friction.

Apparatus having a housing which accommodates a sound transducer and which has a passage

In an electroacoustic transducer ( ) having a hollow cylindrical magnet system ( ) and a contact holding assembly ( ), retained in an inner zone ( ), for holding spring contacts ( ), the contact holding assembly ( ) includes two preferably identical contact holding elements ( ) which adjoin one another along two identically shaped bounding surfaces ( ), and each contact holding element ( ) has a holding chamber ( ) which opens towards its bounding surface ( ), each holding chamber ( ) accommodating a spring contact ( ) inserted into the holding chamber ( ) from the side of the bounding surface ( ).

Electroacoustic transducer having contact holding means for spring contacts for the electrical connection of the transducer

In an apparatus ( ) having an electroacoustic transducer ( ) and having a printed circuit board ( ) the electroacoustic transducer ( ) has two terminal contact elements ( ) and the printed circuit board ( ) has two mating contact elements ( ), which terminal contact elements ( ) have two terminal contact portions ( ) which are oriented parallel to the transducer axis ( ) of the transducer ( ) and which mating contact elements ( ) have two mating contact portions ( ) which are oriented parallel to the transducer axis ( ), the terminal contact portions ( ) and the mating contact portions ( ) being held pairwise against each other in a direction transverse to the transducer axis ( ) and thus forming at least parts of a retainer ( ) with the aid of which the transducer ( ) is secured to the printed circuit board ( ).

Apparatus including an electroacoustic transducer having terminal contacts which extend in the direction of the transducer axis and including a printed circuit board having mating contacts

An electroacoustic transducer (,) having a voice coil (,) and having a diaphragm (,) with an annular intermediate zone (,) for securing the voice coil (,), the intermediate zone (,) having angularly spaced-apart trough portions (,) which are each bounded by a trough bottom wall (,) and two trough side walls (,), and the voice coil (,) being secured to the trough bottom walls (,).

Growing community of inventors

Himberg, Austria

Erich Klein