Abstract: An earphone is provided that can decrease a time delay between a microphone and a loudspeaker. The earphone includes a microphone incorporated with the membrane of loudspeaker. The loudspeaker and the microphone are connected by connection lines to an electronic circuit.

Abstract: The invention relates to a plug earphone with a front portion and a rear portion, wherein a flexible plug can be placed on the front portion which includes an outer portion and an inner portion. An electroacoustic transducer is arranged in the rear portion, wherein the front portion is positioned on the electroacoustic transducer and on an opening of the rear portion produced in this area. To achieve a reliable acoustic friction piece which is easy to manufacture, the front portion, and optionally an inner portion and an outer portion, together with a front wall of the rear portion, forms at least one radial channel leading from the interior of the front portion to the outside, and an acoustic friction piece is optionally arranged in the radial channel.

Abstract: The invention relates to a plug earphone with a front portion and a rear portion, wherein a flexible plug can be placed on the front portion which includes an outer portion and an inner portion. An electroacoustic transducer is arranged in the rear portion, wherein the front portion is positioned on the electroacoustic transducer and on an opening of the rear portion produced in this area. To achieve a reliable acoustic friction piece which is easy to manufacture, the front portion, and optionally an inner portion and an outer portion, together with a front wall of the rear portion, forms at least one radial channel leading from the interior of the front portion to the outside, and an acoustic friction piece is optionally arranged in the radial channel.

Abstract: An earphone is provided that can decrease a time delay between a microphone and a loudspeaker. The earphone includes a microphone incorporated with the membrane of loudspeaker. The loudspeaker and the microphone are connected by connection lines to an electronic circuit.

Abstract: An earphone device converts electric signals to audible sound. The device includes an outer area configured to receive a power source. A plug area adjacent to the outer area may be configured to fit within a user's auditory canal. A dynamic transducer reproduces a predetermined frequency spectrum for the user. A sound channel terminating at an output of the dynamic transducer encloses the second transducer.

Abstract: An earphone device converts electric signals to audible sound. The earphone includes a first electroacoustic transducer and a second electroacoustic transducer. A separating part of the earphone is positioned between the second transducer and a sound opening of a plug area of the earphone. The separating part forms a barrier between a first sound path for the first transducer and a second sound path for the second transducer. The first sound path comprises a substantially annular cross-section disposed around the second sound path. The earphone includes a filter disk arranged in the sound opening, in which an acoustic friction is provided for each of the first and second sound paths.

Abstract: An earphone device converts electric signals to audible sound. The earphone includes a first electroacoustic transducer and a second electroacoustic transducer. A separating part of the earphone is positioned between the second transducer and a sound opening of a plug area of the earphone. The separating part forms a barrier between a first sound path for the first transducer and a second sound path for the second transducer. The first sound path comprises a substantially annular cross-section disposed around the second sound path. The earphone includes a filter disk arranged in the sound opening, in which an acoustic friction is provided for each of the first and second sound paths.

Abstract: An earphone device converts electric signals to audible sound. The device includes an outer area configured to receive a power source. A plug area adjacent to the outer area may be configured to fit within a user's auditory canal. A dynamic transducer reproduces a predetermined frequency spectrum for the user. A sound channel terminating at an output of the dynamic transducer encloses the second transducer.

Abstract: An electroacoustic transducer, functioning as an acoustic pick-up or as a sound generator, has a housing having a bottom and a wall portion. A diaphragm is connected to the housing opposite the bottom and encloses a diaphragm volume. An electromagnetic system is arranged in the housing and has a coil connected to the diaphragm. The housing has at least one cutout cooperating with at least one projection provided on a device in which the electroacoustic transducer is to be mounted. The projection defines a passage between the diaphragm volume and a volume at the back of the housing and thus forms the main air passage.

Abstract: An electroacoustic transducer, functioning as an acoustic pick-up or as a sound generator, has a housing having a bottom and a wall portion. A diaphragm is connected to the housing opposite the bottom and encloses a diaphragm volume. An electromagnetic system is arranged in the housing and has a coil connected to the diaphragm. The housing has at least one cutout cooperating with at least one projection provided on a device in which the electroacoustic transducer is to be mounted. The projection defines a passage between the diaphragm volume and a volume at the back of the housing and thus forms the main air passage.