Well, we’re happy to report that our ears are working just fine today. How do we know? Because we couldn’t make it through a few seconds of the below ad without scrambling for the “mute” button.

The clever spot, created by Draftfcb Toronto for the Union Hearing Aid Centre, actually appears to be a vision test, displaying letters in ever-shrinking fonts. When viewers reach the end of the commercial, they are informed that if they can read the final tiny line of print, then their “eyesight is fine”, but that (surprise!) they may want to invest in a hearing test at Union, as a “really annoying, really loud high-frequency sound” has been playing throughout the ad; those with good hearing would have likely found the sound too intolerable to make it through to the end.

Like we said — clever. We just wouldn’t recommend playing it at full volume at work…or a dog park.