A microphone jammer includes a base and a signal generator mounted to the base. The signal generator is configured to generate an ultrasonic signal. The jammer also includes one or more transducers mounted to the base and configured to transmit the ultrasonic signal. The one or more transducers are mounted in a curved layout about the base.

A voice morphing apparatus having adjustable parameters is described. The disclosed system and method include a voice morphing apparatus that morphs input audio to mask a speaker's identity. Parameter adjustment uses evaluation of an objective function that is based on the input audio and output of the voice morphing apparatus. The voice morphing apparatus includes objectives that are based adversarially on speaker identification and positively on audio fidelity. Thus, the voice morphing apparatus is adjusted to reduce identifiability of speakers while maintaining fidelity of the morphed audio. The voice morphing apparatus may be used as part of an automatic speech recognition system.

A distributed transmit platform deception network array system includes a plurality of platforms; each platform comprising at least one transmitter; wherein the platforms are in a geographically distributed configuration with respect to each other and at least one victim receiver; a propagating wavefront is generated by the transmitters of the plurality of platforms toward the at least one victim receiver according to deception target characteristics for each identified victim receiver; whereby the propagating wavefront is controlled, and a false location is determined by the victim receiver, Whereby detection of a deception at alternate receiver locations is minimized by selection of characteristics of the transmitted waveform.

Methods, systems, and devices for wireless communications are described. A base station may transmit, to a user equipment (UE), a control message that includes an identification of a set of protection levels corresponding to different degrees of physical layer security for securing communications between the UE and the base station. The base station may transmit, to the UE, an indication of an identified protection level of the set of protection levels to be used by the UE for securing the communications between the UE and the base station. The UE may communicate with the base station in accordance with the identified protection level.

A radio frequency (RF) jamming device includes a differential segmented aperture (DSA), a jammer source outputting a jamming signal at one or more frequencies or frequency bands to be jammed, and RF electronics that amplify and feed the jamming signal to the DSA so as to emit a jamming beam. The DSA includes an array of electrically conductive tapered projections, and the RF electronics comprise power splitters configured to split the jamming signal to aperture pixels of the DSA. The aperture pixels comprise pairs of electrically conductive tapered projections of the array of electrically conductive tapered projections. The RF electronics further comprise pixel power amplifiers, each connected to amplify the jamming signal fed to a single corresponding aperture pixel of the DSA. The RF jamming device may include a rifle-shaped housing, with the DSA mounted at a distal end of the barrel of the rifle-shaped housing.

Systems, methods, and apparatus for identifying, tracking, and disrupting UAVs are described herein. A tracking system can include one or more first computing devices that receive sensor data associated with an object in a particular airspace from one or more sensors. The first computing device can analyze the sensor data relating to the object to determine information about the object. A portable countermeasure device can include one or more second computing devices. The second computing device can receive the information relating to the object. The second computing device can display a visual indicator indicating the information on a display.

A method for processing information related to one or more monitored areas, the method may include receiving by a central control unit, UAV indicators about at least one unmanned airborne vehicle (UAV) located within the one or more monitored areas; wherein the UAV indicators are generated by a preprocessing step that comprises extracting information that is embedded within sensed UAV communication, the sensed UAV communication is sensed by at least one sensor of a group of sensors; aggregating, by a central control unit, the UAV indicators, to provide aggregated information; and responding to the aggregated information, wherein the responding comprises at least one out of (i) outputting the aggregated information, and (ii) storing the aggregated information.

A method comprising: locating an Unmanned Aerial Vehicle (UAV) which is in breach of a predetermined rule; communicating an indication of the breach to the UAV; monitoring the movement of the UAV following the communication of the breach; and in the event of the movement being below a threshold amount after a predetermined time, the method comprises: notifying another device of the movement being below the threshold amount.

According to a first aspect of the present invention, there is provided a reconnaissance and communication assembly, adapted to be launched from a gun barrel into the air. The assembly comprises a carrier (with a cavity) and a payload (within the cavity). The payload is arranged to be controllably expelled from the carrier and once expelled from the carrier, the payload transmits a signal.

A wireless sound-emitting device includes a housing adapted to be coupled to a wall at a source of electric power, a loudspeaker positioned at a periphery of the housing, a control module outputting an electric audio signal to the at least one loudspeaker, and a wireless communications module in electrical communication with the control module. The loudspeaker emits acoustic signals in a direction parallel to the wall, when the housing is coupled to the wall, with the acoustic signals reflecting off the wall. The device may produce a sound masking noise or play a sound recorded on an internal memory. The device may include an electric plug or be adapted to replace an electric outlet faceplate. The device may have electric pass-through outlets and may be powered by the source of electric power. The device may be controlled remotely, for example via an Internet of Things (IoT) platform.