TapNoiseTapNoise can play sounds when a charger or USB device connects or disconnects. Treat those as event acknowledgements, not a full health check of the power adapter, cable or storage device.
Enable the feedback you want
Use the charger and USB sound controls in TapNoise’s MacBook settings as described in the guide. These plug-event sounds do not require the motion sensor used for knocks and slaps.
Test one known charger or accessory at a modest volume. If feedback is unwanted in a shared room, disable that category rather than changing all system alert sounds.
Check the actual device state
A connection sound does not prove that a battery is charging normally or that a disk is mounted and ready. Inspect the Mac’s battery status, Finder or the relevant device utility when that result matters.
Likewise, a disconnection sound does not replace safely ejecting a storage device before unplugging it. The sound reports an event; it does not prepare a filesystem for removal.
Distinguish an alarm
Guard Mode’s charger alarm is a separate armed feature intended to draw attention. Routine plug feedback should not be confused with guarding an unattended laptop.
For that distinction, read charger alarm limits. If a dock also changes where you hear audio, HDMI and display routing explains why a plug event can coincide with apparent silence.
Sources: TapNoise charger and USB guide, Guard Mode.