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Ultrasound radiation and detection method for non-audible area, involves modulating ultrasound during propagation through medium, receiving ultrasound by microphone, and obtaining externally generated sound from modulated ultrasound signal
Ultrasound radiation and detection method for non-audible area, involves modulating ultrasound during propagation through medium, receiving ultrasound by microphone, and obtaining externally generated sound from modulated ultrasound signal
The method involves modulating ultrasound (2) during propagation through a propagation medium (4) i.e. air, by a sound source (5), and receiving the ultrasound by a microphone (3). Externally generated sound is obtained from a modulated ultrasound signal. Transmitted ultrasound is continuously changed in frequency, and signal processing of a detected signal of a spatial position along an ultrasound signal is assigned. Modulated ultrasound is redirected by one or more reflecting elements and directed towards the microphone. An independent claim is also included for a device for radiation and detection of ultrasound in a non-audible area.
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