Is it possible to disable (or reduce the volume of) of the AirPods connection sound?

Solution 1:

Try skipping the connect sound by playing something on the phone music or youtube video first before connecting your AirPods to the bluetooth. I also find the connect sound a bit too loud in my ears. Hope this helps before Apple introduce the feature to adjust the volume of the connect sound. :)

Solution 2:

No. The system tracks the AirPod volume and the system volume separately so you can keep the phone loud and the AirPods low after they pair, but the connect sound that happens when the AirPods detect they are in your ear canal are set in firmware and not user adjustable.

Unless you can place one in your hand and trigger the connection/proximity sensor this would need a setting to be added to the firmware or software.