Koninklijke Philips Corporation N.v.

Akg Akustische U. Kino-Gerate Gesellschaft M.b.h.

Heinz Renner

Juha Backman

Erich Klein

Werner Fidi

Ernst Ruberl

A transducer () includes a transducer axis (), a membrane (), a magnet system () having an outer magnet system part () and an inner magnet system part (), a moving coil configuration () connected to the membrane () and having a coil carrier () and a moving coil () held by the coil carrier () in an air gap () between the two magnet system parts (), and guides () for rectilinearly guiding the moving coil configuration () parallel to the transducer axis (). The moving coil configuration () has a cylindrical boundary surface () which, together with a cylindrical boundary surface () of the outer magnet system part (), delimits a cylindrical gap () which is acoustically impermeable above a lower limit frequency of at most 100 Hz.

Electroacoustic transducer being acoustical tight in the area of its air gap for its moving coil

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.

Apparatus having an electroacoustic transducer forming a sound reproducing means and a part of vibration generating means

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

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

Boomless hearing/speaking configuration for sound receiving means

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.

Pressure gradient pickup

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.

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Kaltenleutgeben, Austria

Heinz Renner