Signaling microphone covering to the user

H - Electricity – 04 – R

Patent

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Details

H04R 29/00 (2006.01) H04R 3/00 (2006.01)

Patent

CA 2705805

A mechanism is provided that monitors secondary microphone signals, in a multi- microphone mobile device, to warn the user if one or more secondary microphones are covered while the mobile device is in use. In one example, smoothly averaged power estimates of the secondary microphones may be computed and compared against the noise floor estimate of a primary microphone. Microphone covering detection may be made by comparing the secondary microphone smooth power estimates to the noise floor estimate for the primary microphone. In another example, the noise floor estimates for the primary and secondary microphone signals may be compared to the difference in the sensitivity of the first and second microphones to determine if the secondary microphone is covered. Once detection is made, a warning signal may be generated and issued to the user.

L'invention porte sur un mécanisme qui surveille des signaux de microphone secondaire, dans un dispositif mobile à microphones multiples, afin d'avertir l'utilisateur si un ou plusieurs microphones secondaires sont couverts pendant que le dispositif mobile est en utilisation. Dans un exemple, des estimations de puissance à moyenne glissante des microphones secondaires peuvent être calculées et comparées à l'estimation de bruit de fond CME d'un microphone primaire. Une détection de microphone couvert peut être effectuée par comparaison des estimations de puissance lissées des microphones secondaires à l'estimation de bruit de fond CME pour le microphone primaire. Dans un autre exemple, les estimations de bruit de fond CME pour les signaux des microphones primaire et secondaire peuvent être comparées à la différence de sensibilité des premier et second microphones afin de déterminer si le microphone secondaire est couvert ou non. Lorsqu'une détection est faite, un signal d'avertissement peut être généré et envoyé à l'utilisateur.

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