Back to results
US 10,567,863 B2Granted
System and method for configuring audio signals to compensate for acoustic changes of the ear
AssigneeRevX Technologies
InventorDennis Rauschmayer
Life of this patent
Estimating the term…
Abstract
Personal speaker systems including headset and earbud systems may be configured to capture audio data using an in-ear microphone while a speaker outputs known audio signals into the ear canal. The system may generate an acoustic model of the compressed ear canal and ear drum of the listener and utilize the acoustic model to provide noise cancellation at the eardrum, modification to the audio to result in a more natural sound at the eardrum, and/or to measure leakage of the personal speaker system.
Claims20
A method comprising:
- determining a pressure at an in-ear microphone of a personal speaker system;
- determining an input impedance at the in-ear microphone;
- determining the pressure and impedance at the output of a first acoustic line, the first acoustic line representative of a distance between the in-ear microphone and an inner tip of an earbud of the personal speaker system;
- determine a diameter change between a radius of an outer tip of the earbud and a radius of an ear canal of a listener;
- determining the pressure and impedance at the larger radius of the diameter change;
- determining characteristics of a second acoustic line, the second acoustic line representative of a distance between the outer tip of the earbud and an eardrum of the listener;
- determining a complex lumped acoustic impedance representative of the eardrum;
- and
- determining the pressure at the eardrum.
6 more elements
A method comprising:
- determining an impedance at a point associated with an in-ear microphone based at least in part on a thevinin equivalent pressure of the speaker, the thevinin equivalent impedance of the speaker, and the pressure measured at the in-ear associated with an acoustic model of an ear canal of a listener;
- determining a impedance at the inner tip of the earbud based at least in part on the characteristics of the first acoustic line;
- and
- determining a reflection coefficient at the inner tip of the earbud based at least in part on the impedance at the inner tip of the earbud;
- determining a pressure at the inner tip of the earbud based at least in part on the reflection coefficient;
- determining a impedance at the outer tip of the earbud based at least in part on the pressure at the pressure at the inner tip of the earbud;
- determining a pressure at the outer tip of the earbud based at least in part on the impedance at the outer tip of the earbud;
- determining a length of an ear canal of the listener;
- determining a impedance at the eardrum based at least in part on the length of the ear canal;
- determining a reflection coefficient at the eardrum based at least in part on the impedance at the eardrum;
- determining a pressure at the eardrum based at least in part on the reflection coefficient at the eardrum;
- estimating noise energy at the eardrum based at least in part on the pressure the eardrum and the impedance at the eardrum;
- setting at least one parameter of a noise cancelation process based at least in part on the noise energy;
- and
- outputting anti-noise signal to cancel sound at the eardrum, the anti-noise signal based on the least one parameter of the noise cancelation process.
12 more elements
A device comprising:
- a speaker;
- an in-ear microphone;
- at least one processor;
- a non-transitory computer readable media storing instructions which when executed by the at least one processor, cause the at least one processor to perform operations including:
- determining a the pressure at an in-ear microphone of a personal speaker system;
- determining a input impedance at the in-ear microphone;
- determining the pressure and impedance at the end of a first acoustic line, the first acoustic line representative of a distance between the in-ear microphone and an inner tip of an earbud of the personal speaker system;
- determine a diameter change between a radius of an outer tip of the earbud and a radius of an ear canal of a listener;
- determining characteristics of a second acoustic line, the second acoustic line representative of a distance between the outer tip of the earbud and an eardrum of the listener;
- determining a complex lumped acoustic impedance representative of the eardrum;
- and
- determining the pressure at the eardrum.
9 more elements
Dependencies are inferred from the claim text.