Telecoil predicted repeating system interference canceller
Disclosed herein, among other things, are systems and methods for cancelling interference from a telecoil signal for ear-wearable devices. A method includes receiving a signal from a telecoil of a hearing device, and using a trigger signal to initiate recordings of segments of the telecoil signal. An interference component is isolated from the telecoil signal using the recorded segments. The interference component is inverted and added to the telecoil signal to cancel the interference component from the telecoil signal, and audio from the telecoil signal is provided to a wearer of the hearing device.
1 . A method, comprising:
receiving a signal from a telecoil of a hearing device;
using a trigger signal to initiate recordings of segments of the telecoil signal;
isolating an interference component from the telecoil signal using the recorded segments;
inverting the interference component;
summing the inverted interference component with the telecoil signal to cancel the interference component from the telecoil signal; and
playing audio from the telecoil signal for a wearer of the hearing device.
2 . The method of claim 1 , wherein isolating an interference component includes adding the recorded segments to a running average of recorded segments.
3 . The method of claim 1 , wherein summing the inverted interference component with the telecoil segment includes using time alignment based on the trigger signal.
4 . The method of claim 1 , wherein the interference component includes an artifact from a wireless radio of the hearing device.
5 . The method of claim 4 , wherein the wireless radio includes a Bluetooth® compatible radio.
6 . The method of claim 1 , comprising:
examining the recordings of segments of the telecoil signal;
identifying one or more recordings that contain primarily desired audio content; and
excluding the identified one or more recordings when isolating the interference component.
7 . The method of claim 6 , wherein identifying the one or more recordings that contain primarily desired audio content includes comparing the recordings to an energy level threshold.
8 . The method of claim 1 , wherein the trigger signal is configured to identify timing of an impending interference component.
9 . The method of claim 1 , wherein the trigger signal is configured to identify a type of an impending interference component.
10 . The method of claim 1 , wherein the hearing device includes a hearing aid.
11 . A hearing device, comprising:
a magnetic sensor configured to receive an inductive input; and
at least one processor and data storage in communication with the at least one processor, wherein the data storage comprises instructions thereon that, when executed by the at least one processor, causes the at least one processor to:
receive a signal from the magnetic sensor;
use a trigger signal to initiate recordings of segments of the signal;
isolate an interference component from the signal using the recorded segments;
invert the interference component;
sum the inverted interference component with the signal to cancel the interference component from the signal; and
play audio from the signal for a wearer of the hearing device.
12 . The device of claim 11 , wherein, to isolate an interference component, the at least one processor is programmed to:
add the recorded segments to a running average of recorded segments.
13 . The device of claim 11 , wherein, to sum the inverted interference component with the segments, the at least one processor is programmed to:
use time alignment based on the trigger signal.
14 . The device of claim 11 , wherein the interference component includes an artifact from a wireless radio of the hearing device.
15 . The device of claim 11 , wherein the magnetic sensor includes a telecoil.
16 . The device of claim 11 , wherein the at least one processor is programmed to:
examine the recordings of segments of the signal;
identify one or more recordings that contain primarily desired audio content; and
exclude the identified one or more recordings when isolating the interference component.
17 . The device of claim 16 , wherein, to identify the one or more recordings that contain primarily desired audio content, the at least one processor is programmed to:
compare the recordings to an energy level threshold.
18 . The device of claim 11 , wherein the trigger signal is configured to identify timing of an impending interference component.
19 . The device of claim 11 , wherein the trigger signal is configured to identify a type of an impending interference component.
20 . The device of claim 11 , wherein the hearing device includes a hearing aid.