Increased dynamic range microphone
AssigneeNokia Corporation
InventorsMikko Veli Aimo Suvanto, Andrew Duncan Phelps
Life of this patent
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Abstract
Disclosed herein are apparatus, method, and computer program product whereby a device receives an acoustic signal, where the acoustic signal has a variable sound pressure level. A device outputs an electrical signal from an input audio transducer, where the input audio transducer is connected to a supply voltage. The device determines a distortion level of the electrical signal; and increases or decreases the supply voltage based on the distortion level.
Claims16
A method, comprising:
- receiving an acoustic signal, where the acoustic signal has a variable sound pressure level;
- outputting an electrical signal from an input audio transducer based on the acoustic signal, where the input audio transducer is connected to a supply voltage;
- determining a distortion level of the electrical signal;
- and
- varying the supply voltage for changing the sensitivity of the input audio transducer based on the distortion level.
A computer readable medium encoded with a computer program executable by a processor to perform actions comprising:
- receiving an acoustic signal, where the acoustic signal has a variable sound pressure level;
- outputting an electrical signal from an input audio transducer based on the acoustic signal, where the input audio transducer is connected to a supply voltage;
- determining a distortion level of the electrical signal;
- and
- varying the supply voltage for changing the sensitivity of the input audio transducer based on the distortion level.
An apparatus, comprising:
- an input audio transducer configured to output an electrical signal based on receiving an acoustic signal, where the acoustic signal has a variable sound pressure level;
- and
- circuitry comprising a charge pump configured to vary a supply voltage connected to the input audio transducer for changing the sensitivity of the input audio transducer in response to a determination of a distortion level of the electrical signal.
Dependencies are inferred from the claim text.