A quieter room can make an unchanged operating sound more noticeable. Compare the character and pattern of the noise, not just how intrusive it feels when other household sounds stop.
What the observation tells you
That possibility does not excuse a genuinely new knock, scrape or repeated start attempt. Keep the appliance's cooling performance and any recent loading in the account. A phone recording taken from similar positions is more comparable than one made against the cabinet.
A useful next step
Check obvious safe contacts such as bottles touching. If the sound has changed or cooling is unreliable, request assessment and describe the difference from its previous normal behaviour.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.