Cirrus Logic Inc.

Aaron Treptow

Jon David Hendrix

Shahram Tadayon

Brian Thornock

K Joshua Bodon

Aleksey Sergeyevich Khenkin

Vadim A Konradi

Hamid Sepehr

Ning Li

Marco A Janko

Michael Kurek

Peter Foskey

Ben Leslie

A method of controlling a vibrational transducer, the method comprising: tracking a temperature metric of the vibrational transducer; and controlling a drive signal for the vibrational transducer, where the drive signal is limited to a value to protect the vibrational transducer from over excursion, and where said value is a function of the tracked temperature metric.

Vibrational transducer control

A method may include receiving a user trigger signal indicating a user desire to update characteristics of an adaptive filter, receiving an error microphone signal indicative of the output of the transducer and the ambient audio sounds at the transducer, wherein the transducer reproduces both a source audio signal for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer, implementing the adaptive filter having a response that generates the anti-noise signal to reduce the presence of the ambient audio sounds in the error microphone signal, determining an acoustic coupling of the transducer to an error microphone for producing the error microphone signal, and responsive to a change in the acoustic coupling, prompting a user to assert the user trigger signal to indicate user desire to update characteristics of the adaptive filter.

On-demand adaptive active noise cancellation system

On-demand adaptive active noise cancellation

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Austin, TX, United States of America

Aaron Treptow