Abstract: A communication device and method including a microphone, a first filter coupled to the microphone adapted to pass signals in an audio band only, a second filter coupled to the microphone adapted to pass signals only in an upper region of the audio band, an optional amplifier or two, an analog to digital converter (ADC) unit or two, an optional a switching unit connected between an input of the ADC unit and an output of each of the first and second filters and configured to selecting between the first and second filters, and a controller configured to control the switching unit and/or to select the second filter for acoustic communication, where the acoustic communication is adapted to the upper region of the audio band.

Abstract: An electrostatic loudspeaker, or a diaphragm for an electrostatic loudspeaker, where the diaphragm includes a plurality of conductive parts and, at least one insulator part separating between the conductive parts, and where each of the plurality of conductive parts is electrically connectable to a different bias voltage according to the minimal distance between the particular conductive part and one or more fixed conductive grids positioned in parallel to the diaphragm.

Abstract: A method and a system for remote controlling one or more service providing devices, including a mobile device operative to control a service providing device within a first range, where the mobile device is operative to interrogate the one or more service providing devices within a second range being smaller than the first range, where, responsive to the interrogation by the mobile device, the service providing device identifies itself to the mobile device, and where the mobile device is operative to present to a user a list including one or more of the service providing devices within the second range.

Abstract: A method and a system for ultra-low-power acoustic sensor including a buffer transistor, which gate terminal is connected to a first terminal of a capacitive acoustic sensor, which drain terminal is connected via a load network to a power source and to an output terminal, and which source terminal is connected to the regulated current source, where the regulated current source is connected between the source terminal of the buffer transistor and a reference terminal, and where the reference terminal being connectable to a second terminal of the capacitive acoustic sensor.

Abstract: A method and a system for remote controlling one or more service providing devices, including a mobile device operative to control a service providing device within a first range, where the mobile device is operative to interrogate the one or more service providing devices within a second range being smaller than the first range, where, responsive to the interrogation by the mobile device, the service providing device identifies itself to the mobile device, and where the mobile device is operative to present to a user a list including one or more of the service providing devices within the second range.