There is provided a wireless microphone and/or in-ear monitoring system having at least one first mobile device (MT), in particular a wireless microphone for wirelessly transmitting first audio signals (UL). The system also has at least one base station for wirelessly receiving first audio signals (UL) transmitted by the at least one mobile device (MT). The wireless transmission is based on an orthogonal frequency-division multiplexing transmission (OFDM) during a TDMA time slot. Each wireless microphone occupies at least one slot within 2 ms. Each of the TDMA frames has a plurality of slots which respectively have precisely one OFDM symbol. Accordingly precisely one OFDM symbol is transmitted in each TDMA slot. During a time slot made available in accordance with the TDMA a transmission is effected on the basis of an OFDM method. The TDMA frame length is so short as a latency of <4 ms is required for professional audio transmission, for example in the case of wireless microphone systems.
A headset or earphone is provided, having an electro-acoustic reproduction transducer with an oscillator coil arranged in an axis. An amplifier is coupled to the electro-acoustic reproduction transducer. The headset or earphone also has a magnetic interference sensor for measuring a magnetic interference field. A correction unit, for analyzing an output of the magnetic interference sensor and for producing a compensation signal, is coupled to the magnetic interference sensor. In addition, the headset or earphone also includes an adding unit for adding the compensation signal to an input signal and foroutputting the result to the amplifier.
A headset is provided which comprises a cable (100) having a plug (110) coupled to the first end of a cable (100), a connector (140) coupled to the second end of a cable, a housing (130) arranged between the first and second end of the cable and a cable section (120) between the plug (110) and the housing (130). The plug (110) comprises at least one pin and six terminals (110a - 100f). The cable section (120) comprises four wires (121, 123, 125, 126) and two screens (122, 124). The housing (130) comprises a connecting unit (134) having a switching unit (136) which is connected to the four wires (121, 123, 125, 126) and the two screens (122, 124) and the soldering areas (135) to which wires of the headset can be coupled. The switching unit (136) is adapted to switch between at least two wiring settings connecting the four wires as well as the two screens (122, 124) to the soldering areas (135).
H01R 29/00 - Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series/parallel selection
H01R 9/03 - Connectors arranged to contact a plurality of the conductors of a multiconductor cable
H01R 24/00 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
Provision is made for an interchangeable accumulator unit comprising a housing (10, 20) and a lithium accumulator cell (40) arranged in the housing. Provision is further made in the housing of the accumulator unit for a charging circuit for controlling the charging process of the lithium accumulator cell (40). Provision is made on the housing (10, 20) for at least one first charging contact unit (100, 200).
H01M 50/244 - Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
H01M 50/296 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
H01M 50/569 - Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
5.
A CAPACITIVE SOUND TRANSDUCER HAVING A PERFORATED ATTENUATION DISC
The invention relates to a capacitive sound transducer and a condenser microphone having such a sound transducer. The sound transducer comprises a diaphragm (3) and a counterelectrode (1) which is disposed at a short distance from the diaphragm (3) and provided with first perforations (2). In order to attenuate natural oscillations of the diaphragm (3) at high frequencies, a capacitive sound transducer is proposed in which a sound-permeable attenuation disc (7) provided with second perforations (8) is disposed at a short distance from the diaphragm (3) and opposite the counterelectrode (1). In this arrangement, the first perforations (2) and the second perforations are also offset in relation to each other.
H04R 19/01 - Electrostatic transducers characterised by the use of electrets
H04R 1/38 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
6.
HEADPHONES FOR CONNECTION TO AN EXTERNAL ACTIVE NOISE COMPENSATION DEVICE
There is provided headphones for connection to an external active noise compensation device. The headphones have at least one earphone, a microphone near the ear, and a passive circuitry network for increasing the amplification of the external noise compensation device. In that way noise compensation in respect of the external noise compensation can be increased by increasing the overall amplification by the passive network.
patents
