Abstract: Microphone array which comprises a multiple of microphones which are arranged in an elongated element or housing, in which the individual microphones in the microphone array are arranged in pairs. The individual microphones in each pair are disposed on each their side of a centerline for the microphone array, where the signals from the microphones are summated in the formation of the output signal from the microphone array. The microphones on each side of the centerline of the microphone array are disposed with non-equidistant spacing between them, and low-pass filters are coupled between each microphone and a summation link, in that the microphones associated with one and the same pair are connected to low-pass filters having the same cut-off frequency.

Abstract: The present invention concerns a lifting device which is configured to be coupled mechanically to a given telephone apparatus, said telephone apparatus having a handset and a fixed part, and whereby the lifting of the handset activates a switch in the telephone apparatus. The lifting device comprises a movable element which is configured to be in connection with the handset and lift the handset by means of a drive unit which brings about a movement of the movable element. The lifting device also comprises a bracket which is configured to be placed on the telephone apparatus in between this and the handset, under which the movable element is housed in a movable manner in the bracket.

Abstract: A telephone headset apparatus is disclosed. This headset apparatus includes a body having a microphone at one end and a transducer at the opposite end, an earhook, for attaching the apparatus to the ear of the operator, and a mechanism, contained within the body in a movable engagement, for holding the earhook in a frictional engagement that allows for movement of the earhook, with three degrees of freedom. The mechanism is located at a point within the body where upon adjustment of the earhook by the operator (i.e., rotated, tilted, pivoted) the headset apparatus remains properly balanced and within the sound envelope of an operator, for uninterrupted operation.

Abstract: The invention concerns a circuit for the amplification of signals from a microphone, comprising a power source and a current generator which supplies a microphone, such as an electret microphone, with electrical energy in the form of pulses. The circuit clocks the power supply to the microphone with an active pulse time t1, and the sampling circuit reads the microphone signal in a window with the duration t2 calculated from the rear flank of the active part of the supply pulse, whereby t1 is shorter than the time period T corresponding to the sampling frequency 1/T, and whereby t1 is of a length which is sufficient to enable the microphone current to reach a usable value, and whereby t2 can be shorter than t1.

Abstract: A telephone headset apparatus is disclosed. This headset apparatus includes a body having a microphone at one end and a transducer at the opposite end, an earhook, for attaching the apparatus to the ear of the operator, and a mechanism, contained within the body in a movable engagement, for holding the earhook in a frictional engagement that allows for movement of the earhook, with three degrees of freedom. The mechanism is located at a point within the body where upon adjustment of the earhook by the operator (i.e., rotated, tilted, pivoted) the headset apparatus remains properly balanced and within the sound envelope of an operator, for uninterrupted operation.

Abstract: Communication system for users of hearing aids in connection with the use of a mobile telephone (1), and where the hearing aid user (5) wears at least one hearing aid (4). The system comprises a headset (3) coupled to the mobile telephone, said headset comprising a microphone (6) and a tele-coil (10) for communication with the hearing aid.It is hereby avoided that electrical or electromagnetic noise from the mobile telephone penetrates the hearing aid.