Method for ensuring symmetric audio quality for hands-free phoning

1. A hearing device comprising:

a processor; and

a wireless transceiver operatively connected with the processor, the wireless transceiver being configured to connect via a wireless link with at least one remote device, being configured to exchange bi-directional audio packets with the remote device over a Bluetooth isochronous transport, and being configured to provide a transmit count and/or a successful receive count after every isochronous interval indicating how many attempts have occurred to transmit and receive audio packets, respectively, wherein:

a transmit power of the remote device is larger than a transmit power of the hearing device, and

the processor is configured to:

use the transmit count and/or the successful receive count provided by the transceiver to estimate an outgoing audio link packet error rate of a transmission from the hearing device to the at least one remote device via the wireless link,

increase a transmit power of the hearing device when the outgoing audio link packet error rate exceeds a first pre-determined threshold, and

generate a notification to a hearing device user when the outgoing audio link packet error rate exceeds a second pre-determined threshold.

2. The hearing device according to claim 1 , wherein the processor is part of the wireless transceiver.

3. The hearing device according to claim 1 , wherein the notification comprises at least one of a single beep, a beep sequence, artificially degrading an incoming audio quality, or muting incoming audio.

4. The hearing device according to claim 1 , wherein the wireless link follows a Bluetooth specification.

5. The hearing device according to claim 4 , wherein the wireless link follows a Hands-Free Profile (“HFP”) of the Bluetooth specification.

6. The hearing device according to claim 4 , wherein the wireless link is configured to use an Enhanced Synchronous connection-oriented (“eSCO”) transport option of the Bluetooth specification or another isochronous transport option of the Bluetooth specification.

7. The hearing device according to claim 1 , wherein the audio link packet error rate is estimated by monitoring a number of necessary retransmissions from the hearing device towards the remote device.

8. The hearing device according to claim 1 , wherein the audio link packet error rate is estimated by monitoring acknowledgements transmitted by the remote device related to audio packets received by the remote device.

9. The hearing device according to claim 1 , wherein the Bluetooth isochronous transport is an Enhanced Synchronous Connection-Oriented (eSCO) logical transport or another Bluetooth isochronous logical transport.

10. A hearing device comprising:

a processor; and

a wireless transceiver operatively connected with the processor, the wireless transceiver being configured to connect via a wireless link with at least one remote device, being configured to exchange bi-directional audio packets with the remote device over a Bluetooth isochronous transport, and being configured to provide a transmit count and/or a successful receive count after every isochronous interval indicating how many attempts have occurred to transmit and receive audio packets, respectively, wherein:

the processor is configured to:

use the transmit count and/or the successful receive count provided by the transceiver to monitor an outgoing audio link packet error rate,

increase a transmit power of the hearing device when the outgoing audio link packet error rate exceeds a first pre-determined threshold, and

generate a notification to a hearing device user when the outgoing audio link packet error rate exceeds a second pre-determined threshold.

11. The hearing device according to claim 10 , wherein the processor is part of the wireless transceiver.

12. The hearing device according to claim 10 , wherein the remote device is at least one of a mobile phone, a Digital Enhanced Cordless Telecommunications (“DECT”) phone, a landline phone, a tablet, or a computer.

13. The hearing device according to claim 10 , wherein the processor is further configured to generate and send a notification when the audio link packet error rate exceeds a pre-determined threshold.

14. A method for controlling an audio quality in a hearing device comprising a processor and a wireless transceiver operatively connected with the processor, the wireless transceiver being configured to connect via a wireless link with a remote device, the method comprising:

providing a transmit count and/or successful receive count

using the transmit count and/or the successful receive count provided by the transceiver to estimate an outgoing audio link packet error rate of a transmission via the wireless link,

increasing a transmit power of the hearing device when the outgoing audio link packet error rate exceeds a first pre-determined threshold, and

generating a notification to a hearing device user when the outgoing audio link packet error rate exceeds a second pre-determined threshold.

15. The method according to claim 14 , wherein the hearing device is configured to exchange bi-directional audio packets with the remote device via the wireless link.

16. The method according to claim 14 , wherein estimating the audio link packet error rate comprises monitoring a number of necessary re-transmissions from the hearing device towards the remote device or monitoring acknowledgements transmitted by the remote device related to audio packets received by the remote device from the hearing device.

17. The method according to claim 14 , further comprising:

generating and sending a notification when the audio link packet error rate exceeds a pre-determined threshold.

18. The method according to claim 17 , wherein the notification comprises at least one of a single beep, a beep sequence, artificially degrading an incoming audio quality, or muting incoming audio.

19. A method for controlling an audio quality in a hearing device comprising a processor and a wireless transceiver operatively connected with the processor, the wireless transceiver being configured to connect via a wireless link with a remote device, the method comprising:

providing a transmit count and/or successful receive count,

estimating an outgoing audio link packet error rate of a transmission from the hearing device to the at least one remote device via the wireless link based on the transmit count and/or the successful receive count,

increasing a transmit power of the hearing device when the outgoing audio link packet error rate exceeds a first pre-determined threshold, and

generating and sending a notification when the outgoing audio link packet error rate exceeds a second pre-determined threshold.

20. The method according to claim 19 , wherein the notification comprises at least one of a single beep, a beep sequence, artificially degrading an incoming audio quality, or muting incoming audio.