Abstract: A system determines a distance between networked electronic devices. A first sound signal comprising a first measuring wave having a first frequency carried on a first carrier wave having a first carrier frequency higher than the first frequency is emitted by a first device. A second device receives the first sound signal, and defines a second sound signal comprising a second measuring wave having the first frequency carried on a second carrier wave having a second carrier frequency different from the first carrier frequency. A phase of the second measuring wave is set such that it simulates a reflection of the first measuring wave on the second device. The second sound signal is emitted by the second device and received by the first device. The distance between the first and second devices is calculated based on a phase shift between the emitted first, and received second measuring waves.

Abstract: A system and a method of identifying which networked device of a set of networked devices is mounted at a first mounting location of mounting locations of the set of networked devices known in a management server are disclosed. Each networked device of the set of networked devices has a unique identifier. A predetermined sound is emitted using a loudspeaker of a portable device. Information specifying the first mounting location is further sent from the portable device to the management server. Upon detecting the predetermined sound using a microphone in a first networked device of the set of networked devices, the unique identifier of the first networked device is sent from the first networked device to the management server. At the management server, the unique identifier of the first networked device is then linked to the first mounting location.