# US 10,375,492 B2 · Method of fitting a hearing assistance device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,492 B2 - Document ID: US10375492B2 - Status: Granted - Kind: B2 - Application number: 15/571,520 - Filed: 2015-06-30 - Published: 2019-05-02 - Granted: 2019-08-06 - Earliest claimed: 2015-06-30 - Assignees: Sonova AG - Applicants: Sonova AG - Inventors: Stephan Gehring; Roland Hug; Amre El-Hoiydi - Web page: https://patentgrep.com/patent/US10375492B2 ## CPC - H04R 25/70: {Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting} - H04R 25/55: {using an external connection, either wireless or wired} - H04R 25/554: {using a wireless connection, e.g. between microphone and amplifier or using Tcoils} - H04W 76/14: Direct-mode setup - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract There is provided a method of fitting a hearing assistance device (10, 11) by using a fitting station (40), the hearing assistance device and the fitting station both having a wireless communication interface (20), comprising: generating, separately from the hearing assistance device and the fitting station, a production key, distributing the production key to both the fitting station and the hearing assistance device, and storing the production key on both the fitting station and the hearing assistance device; initiating, via the fitting station, a connection with the hearing assistance device, with the hearing assistance device accepting the connection in order to establish a non-encrypted connection between the fitting station and the hearing assistance device via the wireless communication interfaces; determining, by the fitting station, whether the fitting station has been previously paired with the hearing assistance device, and, if the fitting station has not already been paired with the hearing assistance device, using the production key in both the fitting station and the hearing assistance device as a shared secret in order to pair the fitting station and the hearing assistance device, thereby establishing a secure connection (30) via the wireless communication interfaces between the fitting station and the hearing assistance device; and conducting a fitting session via a secure connection between the fitting station and the hearing assistance device via the wireless communication interfaces. ## Claims ### Claim 1 A method of fitting a hearing assistance device by using a fitting station, the hearing assistance device and the fitting station both having a wireless communication interface, comprising: generating, separately from the hearing assistance device and the fitting station, a production key; distributing the production key to both the fitting station and the hearing assistance device out-of-band, and storing the production key on both the fitting station and the hearing assistance device; initiating, via the fitting station, a connection with the hearing assistance device, with the hearing assistance device accepting the connection to establish a non-encrypted connection between the fitting station and the hearing assistance device via the wireless communication interfaces; determining, by the fitting station, whether the fitting station has been previously paired with the hearing assistance device, and using the production key in both the fitting station and the hearing assistance device as a shared secret to pair the fitting station and the hearing assistance device, establishing a secure connection via the wireless communication interfaces between the fitting station and the hearing assistance device, wherein the secured connection includes encrypted communication based at least in part on the shared secret; and conducting a fitting session via a secure connection between the fitting station and the hearing assistance device via the wireless communication interfaces. ### Claim 2 (depends on 1) The method of claim 1, wherein the same production key is used for a plurality of hearing assistance devices. ### Claim 3 (depends on 1) The method of claim 1, wherein the production key is generated at the manufacturer of the hearing assistance device, and wherein the production key is stored on the hearing assistance device upon manufacturing of the hearing assistance device. ### Claim 4 (depends on 1) The method of claim 1, wherein each wireless communication interface is adapted to use a Bluetooth protocol. ### Claim 5 (depends on 1) The method of claim 1, wherein after pairing, a new user key is generated by action of at least one of the fitting station and the hearing assistance device which is distributed via the secure connection to both the fitting station and the hearing assistance device, and wherein the new user key is used for generating the secure connection during the fitting session. ### Claim 6 (depends on 5) The method of claim 5, wherein the new user key is generated by the fitting station and is transmitted via the secure link to the hearing assistance device. ### Claim 7 (depends on 5) The method of claim 5, wherein the new user key is a random key and wherein the new user key is used for deriving a session key which is used for the secure connection during the fitting session. ### Claim 8 (depends on 1) The method of claim 1, wherein the new user key is stored by both the fitting station and the hearing assistance device, and wherein the fitting station and the hearing assistance device retrieve the stored new user key and use it for generating a secure connection between the fitting station and the hearing assistance device in a subsequent fitting session. ### Claim 9 (depends on 1) The method of claim 1, wherein in case that an attempt to reestablish the secure connection using the new user key fails the production key is re-used by both the fitting station and the hearing assistance device as a shared secret in order to re-pair the fitting station and the hearing assistance device. ### Claim 10 A method for conducting a fitting session, the method comprising: generating, separately from a hearing device and a fitting station, a production key; distributing out-of-band the production key to both the fitting station and the hearing device; initiating, via the fitting station, a connection to the hearing device to establish a non-encrypted connection between the fitting station and the hearing device; using the production key in both the fitting station and the hearing device to pair the fitting station and the hearing device to establish a secure connection between the fitting station and the hearing device, wherein the secured connection includes encrypted communication based at least in part on a shared secret; and conducting a fitting session via the secure connection between the fitting station and the hearing device. ### Claim 11 (depends on 10) The method of claim 10, wherein the hearing device is at least one of following: a hearing aid; a hearing assistance device; behind the ear hearing device; in the ear hearing device; a completely in the canal hearing device; or cochlear implant. ### Claim 12 (depends on 10) The method of claim 10, wherein the production key is associated with gesture-less pairing for the hearing device. ### Claim 13 (depends on 10) The method of claim 10, the method further comprising: determining, by the fitting station, whether the fitting station has been previously paired with the hearing device; and based on determining the fitting station has not previously paired with the hearing device, automatically establishing the secure connection between the hearing device and the fitting station. ### Claim 14 A non-transitory computer readable medium storing instructions that when executed by a processor cause a fitting station and a hearing device to perform operations, the operations comprising: generating, separately from a hearing device and a fitting station, a production key; distributing out-of-band the production key to both the fitting station and the hearing device, and storing the production key on both the fitting station and the hearing device; initiating, via the fitting station, a connection to the hearing device to establish a non-encrypted connection between the fitting station and the hearing device; using the production key in both the fitting station and the hearing to pair the fitting station and the hearing device to establish a secure connection between the fitting station and the hearing device wherein the secured connection includes encrypted communication based at least in part on the production key; and conducting a fitting session via the secure connection between the fitting station and the hearing device. ### Claim 15 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the hearing device is at least one of following: a hearing aid; a hearing assistance device; behind the ear hearing device; in the ear hearing device; a completely in the canal hearing device; or cochlear implant. ### Claim 16 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the production key is associated with gesture-less pairing for the hearing device. ### Claim 17 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the operations further comprise: determining, by the fitting station, whether the fitting station has been previously paired with the hearing device; and based on determining the fitting station has not previously paired with the hearing device, automatically establishing the secure connection between the hearing device and the fitting station.