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Acoustic feedback for signaling electro-magnetic field strength for mobile phones Disclosure Number: IPCOM000183578D
Original Publication Date: 2009-May-28
Included in the Prior Art Database: 2009-May-28

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Mobile phones need a minimum signal strength to operate correctly, since communication between the mobile phone and the base station is critical for good audio signal quality with sufficient bandwidth. Otherwise data packets may be lost and/or the codec is changed to lower bandwidth thus reducing the audio quality or causing staggering of the audio signal. Instead the bar meter or acoustic signaling by request the user‘s intuitive reaction to white noise can be used for indicating the current signal-to-noise ratio on the voice signal. There are several possibilities of realtime feedback of SNR based on ambient noise.