Acoustic processor
First Claim
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1. An acoustic processor for a mobile device having a haptic actuator, the acoustic processor comprising:
- a vibration noise analyser having a drive signal input configured to receive a vibration drive signal for driving the haptic actuator;
an acoustic sensor input for receiving a vibration noise signal corresponding to a vibration noise output from the haptic actuator;
a vibration noise analyser output; and
a controller having a controller input coupled to the vibration noise analyser output, and a controller output configured to output the vibration drive signal;
wherein the vibration noise analyser is configured to generate at least one vibration noise metric from the vibration noise signal, and the controller is configured to adapt a level of the vibration noise output in dependence of the at least one vibration noise metric; and
wherein the controller is configured to adapt the vibration noise output level by generating a cancellation signal for transmission via a loudspeaker to destructively interfere with the vibration noise output.
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Abstract
A method and apparatus of acoustic processing for a mobile device having a haptic actuator is described. A vibration drive signal for driving a haptic actuator is received. A vibration noise output from a haptic actuator is detected. At least one vibration noise metric from the detected vibration noise output and the vibration drive signal is generated. The vibration noise output level is adapted in dependence of the at least one vibration noise metric.
12 Citations
14 Claims
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1. An acoustic processor for a mobile device having a haptic actuator, the acoustic processor comprising:
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a vibration noise analyser having a drive signal input configured to receive a vibration drive signal for driving the haptic actuator; an acoustic sensor input for receiving a vibration noise signal corresponding to a vibration noise output from the haptic actuator; a vibration noise analyser output; and a controller having a controller input coupled to the vibration noise analyser output, and a controller output configured to output the vibration drive signal; wherein the vibration noise analyser is configured to generate at least one vibration noise metric from the vibration noise signal, and the controller is configured to adapt a level of the vibration noise output in dependence of the at least one vibration noise metric; and wherein the controller is configured to adapt the vibration noise output level by generating a cancellation signal for transmission via a loudspeaker to destructively interfere with the vibration noise output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of acoustic processing for a mobile device having a haptic actuator, the method comprising:
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receiving a vibration drive signal for driving the haptic actuator; detecting a vibration noise signal representing a vibration noise output from a haptic actuator; generating at least one vibration noise metric from the vibration noise signal and the vibration drive signal; adapting the level of the vibration noise output in dependence of the at least one vibration noise metric; and adapting the vibration noise output level by generating a cancellation signal for transmission via a loudspeaker to destructively interfere with the vibration noise output.
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Specification