Two Sydney brothers who post videos of themselves pranking strangers on social media, have been charged, accused of damaging a man’s hearing in a prank gone wrong.

Luke and Joel Erwin, who post their videos to Instagram and YouTube, were charged with assault over the incident earlier this month, among others.

Watch the video above

The brothers, who have hundreds of thousands of followers, say they never intend harm.

But last Wednesday, when they blew an air horn in Sydney, they alleged damaged a man’s eardrum.

"If the guy's ear's hurt, yeah I do (regret it),” Luke said.

"I guess people might find it offensive but at the end of the day, we're just trying to have a laugh," Joel said.

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"(They) may think it's only mucking around, unfortunately for them the test is on the alleged victim and how they feel as a result of that prank," lawyer Paul McGirr said.

The pair were also charged after one of them allegedly touched a woman with a hand-held feather-duster at Sydney's Darling Harbour, on Monday, while the other filmed it.

On Tuesday night, one of the brothers began walking beside a woman in Sydney's CBD before fake sneezing and spraying water on her face, neck and shirt, police allege.

The other filmed that incident as well.

The pair were charged with assault occasioning actual bodily harm in company and common assault.

They will face court next month.