I mentioned to a police officer recently that pounding on someone's front door while yelling "Police!" doesn't always succeed in communicating. Some people are hard of hearing. Some get distracted by the noise and therefore can't hear the words (they may have their own noise on their side of the door). Some have a fight/flight/freeze response to any loud noise, regardless of the context, and can't think straight.

I figured he'd be interested in suggestions on how to raise the likelihood the occupants would know it's the police and not some gang bangers. Especially since it could save lives on both sides of an incident, including his.

He wasn't personally interested in yet another thing to carry/deploy/remember when he knocks on doors, and said we can't worry about every "edge case". Whatever I said, he tended to push back.

But after I pressed him some more, he said I could email a suggestion to my state's peace officer standards and training "POST" org. (usa)