Wearable Audio Device Placement Detection

1 . A wearable audio device, comprising:

an electro-acoustic transducer for producing sound;

a proximity sensor that is configured to detect when the wearable audio device is close to a user;

an internal microphone positioned within a housing of the wearable audio device and configured to detect sound in a cavity formed at least in part by a portion of the housing; and

a processor that is configured to estimate, based on at least the proximity sensor, whether the wearable audio device is in place on the user's body, and to estimate, based on the internal microphone, whether the user has completed handling of the wearable audio device.

2 . The wearable audio device of claim 1 , further comprising at least one earcup that is configured to be located on or over an ear of a wearer when the wearable audio device is placed on the head, wherein the proximity sensor and the internal microphone are both positioned in an earcup.

3 . The wearable audio device of claim 1 , wherein the proximity sensor comprises a capacitive proximity sensor.

4 . The wearable audio device of claim 1 , further comprising two earcups that are configured to be located on or over an ear of a wearer when the wearable audio device is placed on the head.

5 . The wearable audio device of claim 4 , wherein there is an internal microphone positioned within each earcup, and wherein the estimation of whether the user has completed handling of the wearable audio device is based on an internal microphone positioned within each of the earcups.

6 . The wearable audio device of claim 1 , wherein the processor is configured to initiate a first group of wearable audio device functions based on the estimation of whether the wearable audio device is in place on the user's body.

7 . The wearable audio device of claim 6 , wherein the processor is configured to initiate a second group of wearable audio device functions based on the estimation of whether the user has completed handling of the wearable audio device, wherein the functions of the second group are different than the functions of the first group.

8 . The wearable audio device of claim 1 , wherein during at least the estimation of whether the user has completed handling of the wearable audio device the internal microphone is monitored at frequencies in the approximately zero Hertz (Hz) to approximately 20 Hz range.

9 . The wearable audio device of claim 1 , wherein the proximity sensor has an output, and the estimation by the processor of whether the wearable audio device is in place on the user's body is in part based on a level of the proximity sensor output.

10 . The wearable audio device of claim 1 , wherein after the processor estimates whether the wearable audio device is in place on the user's body the processor is configured to enable predetermined wearable audio device functions.

11 . The wearable audio device of claim 1 , wherein the processor is further configured to initiate an active noise reduction (ANR) filter determination procedure after an estimation that the user has completed handling the wearable audio device.

12 . The wearable audio device of claim 1 , wherein the processor is further configured to estimate whether the user has removed the wearable audio device from the user's body.

13 . The wearable audio device of claim 12 , wherein the processor is configured to reduce power usage based on the estimation of whether the user has removed the wearable audio device from the user's body.

14 . The wearable audio device of claim 1 , wherein estimating whether the user has completed handling of the wearable audio device indicates that the user has put the wearable audio device in place on the user's body or taken the wearable audio device off the user's body.

15 . An earbud comprising the wearable audio device of claim 1 , wherein handling of the earbud causes sound detectable at the internal microphone at frequencies of up to approximately 20 Hz.

16 . A wearable audio device, comprising:

an electro-acoustic transducer for producing sound;

a proximity sensor that is configured to detect when the wearable audio device is close to a user;

an internal microphone positioned within a housing of the wearable audio device and configured to detect sound in a cavity formed at least in part by a portion of the housing; and

a processor that is configured to estimate, based on at least the proximity sensor, whether the wearable audio device is in place on the user's body, and to estimate, based on the internal microphone, whether the user has completed handling of the wearable audio device,

wherein estimating whether the wearable audio device is in place on the user's body based on at least the proximity sensor has a lower relative confidence than estimating whether the user has completed handling of the wearable audio device based on the internal microphone.

17 . The wearable audio device of claim 16 , wherein the processor is further configured to initiate an active noise reduction (ANR) filter determination procedure after an estimation that the user has completed handling the wearable audio device.

18 . The wearable audio device of claim 16 , wherein after the processor estimates whether the wearable audio device is in place on the user's body the processor is configured to enable predetermined wearable audio device functions.

19 . The wearable audio device of claim 16 , wherein the processor is further configured to estimate whether the user has removed the wearable audio device from the user's body.

20 . The wearable audio device of claim 16 , wherein the processor is configured to:

initiate a first group of wearable audio device functions based on the estimation of whether the wearable audio device is in place on the user's body, and

initiate a second group of wearable audio device functions based on the estimation of whether the user has completed handling of the wearable audio device, wherein the functions of the second group are different than the functions of the first group.