USER ANNUNCIATION ON MICROPHONE COVER Russian patent published in 2012 - IPC H04S3/00 

FIELD: radio engineering.

SUBSTANCE: invention relates to a mechanism, which tracks signals of a secondary microphone in a mobile device with multiple microphones in order to warn a user, if one or more secondary microphones are covered at the moment, when the mobile device is used. In one example the estimate values of secondary microphone capacity averaged in a smoothed manner may be calculated and compared to the estimate value of the minimum noise level of the main microphone. Detection of microphone cover may be carried out by comparison of smoothed estimate values of secondary microphone capacity with an estimate value of minimum noise level for the main microphone. In another example the estimate values of the minimum noise level for signals of the main and secondary microphones may be compared with the difference in the sensitivity of the first and second microphones in order to detect whether the secondary microphone is covered. As soon as detection is over, a warning signal may be generated and issued to the user.

EFFECT: improved quality of main sonic signal sound.

37 cl, 9 dwg