Abstract:
The application relates to a compressor circuit for a listening device, the compressor circuit comprising a pair of input terminals and a pair of output terminals, the compressor circuit being adapted for receiving an electric input signal representing an audio signal with an input voltage swing V ipp at the input terminals and for providing a possibly compressed version of the input signal as an output signal with an output voltage swing V opp at the output terminals. The application further relates to a listening device and to the use of the compressor circuit. The object of the present application is to provide a compressor circuit with a proper functioning also at relatively low input levels. The problem is solved in that an AC to DC voltage converter for generating a DC-control voltage based on the electric input signal or an AC signal derived therefrom, and a voltage controlled resistance for providing an output voltage swing Vopp controlled by the DC-control voltage, wherein the compressor circuit is energized by the electric input signal. An advantage thereof is that a compressor circuit facilitating a flexible adjustment of the maximum output level is provided. The invention may e.g. be used in portable and non-powered listening devices, e.g. headsets or active ear protection devices.
Abstract:
The invention relates to an output reducing system for a telephone system, e.g. implemented in a headset, comprising an input line and an output line, where the input line is transmitting an incoming signal to an output transducer and where the output line in transmitting an outgoing signal from an input transducer, where in connection with the input line a compressor system is provided for reducing the output signal level.
Abstract:
The invention relates to a communication system for use in connection with a stationary communication line, the communication system comprising two input/output units, each input/output unit comprising a first connector for connection of a communication line, a second connector for connection of an input/output device, a rechargeable battery and a third connector for connecting a charging voltage to the rechargeable battery, whereby the units comprise transmitters and receivers for communicating wireless a communication signal in one direction from a first input/output unit to a second input/output unit and in another direction from the second input/output unit a communication signal for input to the communication line.
Abstract:
The headset according to the invention has an elongate cabinet adapted for placement behind the ear lobe, a speaker enclosure hinged to the cabinet part and extending downwards from the upper portion of the cabinet part and a microphone boom extending from the lover tip of the cabinet part. The microphone boom is fastened to the cabinet part in rotatable fashion, and the speaker enclosure has sound exit openings pointing in a direction toward the ear and away from the ear. According to the invention the speaker enclosure has a circumferentially extending band which is detachable from the speaker enclosure.
Abstract:
The invention relates to an output reducing system for a telephone system, e.g. implemented in a headset, comprising an input line and an output line, where the input line is transmitting an incoming signal to an output transducer and where the output line in transmitting an outgoing signal from an input transducer, where in connection with the input line a compressor system is provided for reducing the output signal level.
Abstract:
The present invention relates to a communication system (1) for communication of a plurality of stereo audio signals between a plurality of communication devices (10), wherein the plurality of communication devices comprises a first communication device, a second communication device and at least a third communication device. Each communication device of the plurality of communication devices may comprise a signal processing unit (24), an audio interface (4) configured to receive a local voice signal of a user of the communication device, a binaural rendering unit configured to render the local voice signal into a stereo local voice signal based on a first spatial information (α1), an input communication interface (3) configured to receive a first stereo audio signal (12A) and a second stereo audio signal (12B) of the plurality of stereo audio signals transmitted by the second communication device (10B) and the third communication device (10C), respectively. The first stereo audio signal (12A) may comprise a second voice signal of a second user of the second communication device (10B), and the second voice signal may include a second spatial information (α2), and wherein the second stereo audio signal (12B) may comprise a third voice signal of a third user of the third communication device, and where the third voice signal may include a third spatial information (α3). Furthermore, the communication device may comprise an output communication interface (2) configured to transmit a third stereo audio signal (12C) of the plurality of stereo audio signals comprising the local voice signal provided with the first spatial information to the second communication device and the third communication device. The first stereo audio signal and the second stereo audio signal may be transmitted to the audio interface, and the user of the communication device experiences a virtual sound environment, wherein the second voice signal and the third voice signal is positioned in the virtual sound environment based on the second spatial information and the third spatial information, respectively.
Abstract:
The disclosure relates to a microphone arrangement comprising at least three groups of microphones that are mounted on a head-wearable support structure. The at least three groups of microphones comprising a first group of microphones with one or more microphones, a second group of microphones with one or more microphones, and a third group of microphones with one or more microphones, wherein the first group is mounted to a casing that accommodates signal transmission circuitry, the second group is mounted to slide with respect to the casing and the first group is mounted in a direction of a first axis. Furthermore, the third group comprises either at least one microphone that is arranged on the support structure so as to exhibit less sensitivity for sound coming from a user's mouth than for sound coming from a user's environment when the microphone arrangement is head-worn; or at least two microphones that are arranged symmetrically with respect to a user's head when the microphone arrangement is head-worn and that provide for a directionality that is orientated to the direction of a user's vision; or both.
Abstract:
A communication system for authenticate a second communication device to a first communication device, wherein the communication system comprises a physical connection between a first communication device and a second communication device, where a first message may be transmitted from the first communication device, via the physical connection, to the second communication device. Furthermore, the communication system comprises a non-physical connection between the first communication device and the second communication device, where a second message may be transmitted from the first communication device, via the non-physical connection, to the second communication device, and wherein the second communication device may be configured to evaluate the first message and the second message based on a matching criteria, and if the evaluation of the first message and the second message fulfills the matching criteria then the second communication device may be configured to transmit an acceptance to the first communication device.