Abstract: A system and method for providing navigation through an underground space. The method includes receiving ephemeris data of a plurality of satellites in orbit at a location of the underground space, determining a schedule of the plurality of satellites in orbit, obtaining location of a plurality of pseudolites within the underground space, and determining satellite parameters to configure each of the plurality of pseudolites. Satellite parameters are determined based on the obtained location of each pseudolites and the determined satellite schedule. Also, the satellite parameters include at least a signal modulation parameter and a broadcast data parameter. The method also includes configuring each of the plurality of pseudolites with the respective satellite parameters, and controlling the plurality of pseudolites to broadcast satellite signals based on the determined satellite parameters. The broadcasted satellite signals simulate locations of the plurality of satellites in orbit.

Abstract: A system and method for providing navigation through an underground space. The method includes receiving ephemeris data of a plurality of satellites in orbit at a location of the underground space, determining a schedule of the plurality of satellites in orbit, obtaining location of a plurality of pseudolites within the underground space, and determining satellite parameters to configure each of the plurality of pseudolites. Satellite parameters are determined based on the obtained location of each pseudolites and the determined satellite schedule. Also, the satellite parameters include at least a signal modulation parameter and a broadcast data parameter. The method also includes configuring each of the plurality of pseudolites with the respective satellite parameters, and controlling the plurality of pseudolites to broadcast satellite signals based on the determined satellite parameters. The broadcasted satellite signals simulate locations of the plurality of satellites in orbit.

Abstract: Audio apparatus includes a neckband, which is sized and shaped to be worn around a neck of a human subject and includes left and right sides that rest respectively above the left and right clavicles of the human subject wearing the neckband. First and second arrays of microphones are disposed respectively on the left and right sides of the neckband and configured to produce respective electrical signals in response to acoustical inputs to the microphones. One or more earphones are worn in the ears of the human subject. Processing circuitry is coupled to receive and mix the electrical signals from the microphones in the first and second arrays in accordance with a specified directional response relative to the neckband so as to generate a combined audio signal for output via the one or more earphones.

Abstract: Audio apparatus includes a neckband, which is sized and shaped to be worn around a neck of a human subject and includes left and right sides that rest respectively above the left and right clavicles of the human subject wearing the neckband. First and second arrays of microphones are disposed respectively on the left and right sides of the neckband and configured to produce respective electrical signals in response to acoustical inputs to the microphones. One or more earphones are worn in the ears of the human subject. Processing circuitry is coupled to receive and mix the electrical signals from the microphones in the first and second arrays in accordance with a specified directional response relative to the neckband so as to generate a combined audio signal for output via the one or more earphones.

Abstract: Hearing aid apparatus includes a case, which is configured to be physically fixed to a mobile telephone. An array of microphones are spaced apart within the case and are configured to produce electrical signals in response to acoustical inputs to the microphones. An interface is fixed within the case. Processing circuitry is fixed within the case and is coupled to receive and process the electrical signals from the microphones so as to generate a combined signal for output via the interface.

Abstract: Hearing aid apparatus includes a case, which is configured to be physically fixed to a mobile telephone. An array of microphones are spaced apart within the case and are configured to produce electrical signals in response to acoustical inputs to the microphones. An interface is fixed within the case. Processing circuitry is fixed within the case and is coupled to receive and process the electrical signals from the microphones so as to generate a combined signal for output via the interface.