The inventor of the wireless in-ear monitors that have become a staple on concert stages has a message for Brian Johnson. "Please don't stop performing," Stephen Ambrose of Asius Technologies says in the above video. "Help is on the way."

Johnson has been forced offstage after doctors said he risked total hearing loss. Axl Rose is taking over as his replacement in AC/DC for the remaining dates of their tour. That prompted Ambrose to reach out with news about a new-and-improved version of the in-ear monitor.

Ambrose notes he now realizes that his original invention "can cause permanent hearing loss – even when used at what may be considered to be reasonable listening levels." That's why he stopped manufacturing the devices in the '90s, "until I could make my invention safer."

He made those improvements in cooperation with the National Health Foundation and 64 Audio, which produced the new video. Together, Ambrose says they've created a device that better protects the ear but also allows sounds to be heard more clearly at lower volumes – and that, ultimately, is what could possibly help save Johnson's onstage singing career.

Ambrose admits that he's also "a big fan of Axl Rose's voice," having introduced Guns N' Roses to in-ear monitors in 1990. "But let's be clear," he adds. "I'm with Roger Daltrey on this: I really can't imagine anyone but [Johnson] singing 'Back in Black' – or any other part of the show, for that matter."

He adds that one version of his new invention, which is called the Ambrose Diaphonic Ear Lens, has even helped restore hearing for some users. 64 Audio's video includes footage of people trying out the device. Ambrose says he hopes Johnson will look into this new technology, which could help him "return to the stage, and that, frankly, is something everyone really wants."

Johnson has since said he intends to continue his music career, focusing instead on studio work. Meanwhile, AC/DC are set to begin the European leg of their Rock or Bust tour with Axl Rose on May 7.

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