Method of separating ear canal wall movement information from sensor data generated in a hearing device
A method of processing sensor data generated in a hearing device is disclosed, the hearing device comprising a BTE housing configured to be worn behind an ear of a user and an ITE housing configured to be at least partially inserted into an ear canal of the ear. The method may include receiving, from a movement sensor included in the BTE housing, BTE housing movement data indicative of movements of the BTE housing; receiving, from an ear canal sensor included in the ITE housing, ear canal sensor data affected by movements of an ear canal wall, characterized by determining a correlation between the BTE housing movement data and at least part of the ear canal sensor data; and separating, based on the correlation, information about movements of the ear canal wall relative to the BTE housing from at least part of the ear canal sensor data.
1. A method of processing sensor data generated in a hearing device, the hearing device comprising a BTE housing configured to be worn behind an ear of a user and an ITE housing configured to be at least partially inserted into an ear canal of the ear, the method comprising:
receiving, from a movement sensor included in the BTE housing, BTE housing movement data indicative of movements of the BTE housing;
receiving, from an ear canal sensor included in the ITE housing, ear canal sensor data affected by movements of an ear canal wall,
characterized by
determining a correlation between the BTE housing movement data and at least part of the ear canal sensor data; and
separating, based on the correlation, information about movements of the ear canal wall relative to the BTE housing from at least part of the ear canal sensor data.
2. The method according to claim 1 , wherein the ear canal sensor comprises a physiological sensor configured to provide physiological sensor data indicative of a physiological property of the user, wherein the information about ear canal wall movements relative to the BTE housing is separated from the physiological sensor data.
3. The method according to claim 2 , further comprising
evaluating, after the separating of the information about movements of the ear canal wall relative to the BTE housing, the physiological sensor data to determine a parameter associated with the physiological property of the user.
4. The method according to claim 3 , wherein the ear canal sensor comprises an optical sensor configured to provide at least part of the ear canal sensor data as optical sensor data, the optical sensor comprising a light source configured to emit light toward the ear canal wall and a light detector configured to detect a reflected and/or scattered part of the light, the optical sensor data indicative of the detected light.
5. The method according to claim 4 , wherein the physiological sensor comprises the optical sensor configured to emit the light at a wavelength absorbable by an analyte contained in blood such that the physiological sensor data included in the optical sensor data comprises information about the blood flowing through tissue at the ear.
6. The method according to claim 1 , wherein the movement sensor is a first movement sensor and the ear canal sensor comprises a second movement sensor configured to provide at least part of the ear canal sensor data as ITE housing movement data indicative of movements of the ITE housing, wherein the correlation comprises a correlation determined between the BTE housing movement data and the ITE housing movement data.
7. The method according to claim 1 , further comprising, after or before the separating of information about ear canal wall movements relative to the BTE housing,
separating information about ear canal wall movements corresponding to the movements of the BTE housing from at least part of the ear canal sensor data.
8. The method according to claim 1 , wherein the correlation is at least partially determined in a frequency domain.
9. The method according to claim 1 , wherein the separating of information about ear canal wall movements relative to the BTE housing from at least part of the ear canal sensor data comprises at least one of
removing the information about ear canal wall movements relative to the BTE housing from at least part of the ear canal sensor data;
extracting the information about ear canal wall movements relative to the BTE housing from at least part of the ear canal sensor data;
marking the information about ear canal wall movements relative to the BTE housing in at least part of the ear canal sensor data; and
identifying the information about ear canal wall movements relative to the BTE housing in at least part of the ear canal sensor data.
10. The method according to claim 1 , further comprising
evaluating the separated information about movements of the ear canal wall relative to the BTE housing to determine a parameter associated with a mandibular movement and/or an own voice activity of the user.
11. The method according to claim 10 , further comprising
identifying, based on the parameter associated with the mandibular movement, a chewing and/or a clenching of teeth and/or a coughing and/or a yawning and/or a hemming and/or an intake of food and/or a fluid and/or a medication and/or a teeth cleaning activity by the user.
12. The method according to claim 10 , further comprising
determining whether the parameter associated with the mandibular movement is indicative of a movement pattern representative of an activity of a clenching of teeth by the user which is distinguished from other activities of teeth clenching by the user; and
controlling, when the parameter is indicative of the movement pattern, an operation of the hearing device.
13. The method according to claim 1 , further comprising
monitoring the BTE housing movement data; and
controlling, depending on the BTE housing movement data, the ear canal sensor to provide at least part of the ear canal sensor data.
14. A hearing device comprising
a BTE housing configured to be worn behind an ear of a user;
an ITE housing configured to be at least partially inserted into an ear canal of the ear;
a movement sensor included in the BTE housing, the movement sensor configured to provide BTE housing movement data indicative of movements of the BTE housing;
an ear canal sensor included in the ITE housing, the ear canal sensor configured to provide ear canal sensor data affected by movements of an ear canal wall; and
a processing unit configured to receive the BTE housing movement data and the ear canal sensor data,
characterized in that the processing unit is configured to
determine a correlation between the BTE housing movement data and at least part of the ear canal sensor data; and to
separate, based on the correlation, information about movements of the ear canal wall relative to the BTE housing from at least part of the ear canal sensor data.
15. A hearing system comprising a hearing device configured to be worn at an ear of a user and a second hearing device configured to be worn at a second ear of the user and/or a user device portable by the user, the second hearing device and/or the user device communicatively coupled to the hearing device, the hearing device comprising
a BTE housing configured to be worn behind the ear;
an ITE housing configured to be at least partially inserted into an ear canal of the ear;
a movement sensor included in the BTE housing, the movement sensor configured to provide BTE housing movement data indicative of movements of the BTE housing; and
an ear canal sensor included in the ITE housing, the ear canal sensor configured to provide ear canal sensor data affected by movements of an ear canal wall,
the hearing system further comprising
a processing unit included in the hearing device and/or the second hearing device and/or the user device, the processing unit configured to receive the BTE housing movement data and the ear canal sensor data,
characterized in that the processing unit is configured to
determine a correlation between the BTE housing movement data and at least part of the ear canal sensor data; and to
separate, based on the correlation, information about movements of the ear canal wall relative to the BTE housing from at least part of the ear canal sensor data.