Hi echelonphoto,
welcome to this Apple (user-to-user) Community!
Re: "Airpod pro2 hearing assistance not loud enough: So I have been using the pro2' as hearing aids for a few weeks and they worked quite well, but lately the volume is not what it was"
Wondering if you have seen Apple Support's online article (link below) as you may find it helpful.
Use the Hearing Aid feature on your AirPods Pro 2 or AirPods Pro 3 - Apple Support
Eg: says:
"You can adjust settings like amplification level (how much your AirPods amplify the sound around you), left-right balance, tone, and Conversation Boost on iPhone, iPad or Mac (requires macOS Sequoia 15.1 or later). For quick access to settings, you can use Control Center to adjust settings.
- With your AirPods in your ears and connected to your paired device:
On iPhone or iPad, go to Settings > your AirPods,
then tap Hearing Assistance under Hearing Health.
2.Tap or click Adjustments.
3.To adjust how much your AirPods amplify the sound around you, drag theAmplification slider to the right or left. You can also adjustamplification from Control Center. The volume buttons on your device don't adjust the Hearing Aid amplification level (but do adjust the volume of media playing on your device).
4.To increase or decrease amplification levels by swiping up or down on the Touch controls
of your AirPods, turn on Swipe to Control Amplification. This feature only works when in Transparency mode and no media is playing on your paired device.
5.To adjust the balance between left and right AirPods, drag the Balance slider left or right.
6.To make the sound amplified by your AirPods brighter, drag the Tone slider to the right. For a darker, less bright tone, drag the slider to the left.
7.To decrease the amount of noise in your environment picked up by your AirPods, like fan noise or road noise, drag the Ambient Noise Reduction slider to the right. This can help improve intelligibility in noisier environments.
When you change the settings for your AirPods Pro 2 or AirPods Pro 3, the settings carry over to your other devices. If you have multiple sets of AirPods, you have to set up each set separately.
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Adjust amplification level from Control Center
You can adjust the amplification level of your AirPods in Control Center on iPhone, iPad, Mac, and Apple Watch:
- To adjust on iPhone or iPad, open Control Center, touch and hold the volume control, then adjust the amplification control
.
You can adjust the volume of the two sources separately. For example, you can listen to music on your iPhone while still benefitting from Hearing Aid amplification and blend the volume of the two sources to suit your needs."
There's also a lot more useful info. in the linked article above, that may help get the most out of the hearing health features.
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Re: "Is there some software that is cutting back the volume?"
You may be using the Hearing Protection feature: The article below explains how it works.
See : Use Hearing Protection with your AirPods Pro 2 or AirPods Pro 3 - Apple Support
All the best :-)