Hi Dan Bryant1,
Re: "Chirping sound in AirPods Pro when using as hearing aids. The hearing aid function otherwise works well but the chirping sound is annoying. It is not constant, more random a few times a minute."
Wondering whether this happens only in certain circumstances eg: when streaming audio, or when not.
It may be related to what you are doing, eg: an app (or Live Listen ?) / or where you are situated ... eg: in a certain room, or outside / or maybe it happens in transparency mode or when noise control is off (or on).
Is there any time at all when the chirping is not evident for longer periods, while wearing the AirPods Pro ?
Else: Some kind of feedback ? Could there be some sort of interference ... or environmental effect (eg: AirPods too close to ... microwave?) ... either with the airpods, or could it be related to the device or computer your use them with?
✽ See how to: Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support
There's also a third party (non-Apple) online article: How to fix AirPods static or crackling noise ... may have a tip.
✽ https://www.soundguys.com/airpods-crackling-static-noise-111405/
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Re: "I took it to an Apple tech and they sent my pods to Apple."
Commiserations! You have been through quite a lot already, to be still dealing with the same issue:
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Re: "I get a chirping sound on the left side of my AirPods Pro when using them as hearing aids."
You may want to check, or adjust, the left / right balance slider, or just slide it back and forth a couple of times.
✽ Learn what to do: If your left or right AirPod isn't working - Apple Support
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Re: "I am wondering if anyone else has this issue ... "
It is early days with the new hearing-aid features, and features are still still being introduced in countries where approvals were late. Unless someone with a similar issue replies here; as Apple-users, like yourself, likely no-one here would know whether or not others have a similar situation. We have no access to feedback sent to Apple.
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Re: ".... and if it can be fixed or if it is just something I’ll have to live with."
There are some customizations you might want to experiment with, to see whether there is any improvement.
Maybe fine-tuning, or experimenting with a few settings, could prove helpful
You can use mono audio, adjust left-right stereo balance, amplify soft sounds and adjust certain frequencies to best suit your hearing needs.
✽ See how to: Adjust audio settings on iPhone - Apple Support
✽ You can Customize headphone audio levels on your iPhone or iPad - Apple Support
If necessary, you can adjust controls on the AirPods Pro themslves, so the left one is used differently.
✽ Pause, skip, and adjust volume with your AirPods and AirPods Pro - Apple Support
Eg: says:
"Change the double-tap function for each AirPod (AirPods 1 or 2)
You can set each AirPod to do one of these when you double-tap it:
- Use Siri*
- Play and pause your audio content
- Skip forward
- Go back to the previous track
You can: Choose what you want each AirPod to do when you double-tap it.
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Re: feedback
You might want to send feedback to Apple, and to let them know, if nothing above has helped.
✽ AirPods Feedback: Web-form: Feedback - AirPods - Apple
All the best :-)