[Posted by Chuck Almdale]

This looks like a potentially very useful phone app if you have high-frequency hearing loss and have – or are willing to buy – an Apple phone. It reduces the frequency of the bird’s song – dividing by two, three or four – but doesn’t seem to slow it down, so a 3-second bird song still takes 3 seconds, but the pitch is lower. They’ll probably develop an app for a non-Apple phone as well.

There’s a video on the site with a half-dozen birds singing before and after the app reduces the frequency. Go to the site and watch the video and you’ll know everything I know about it. If anyone gets one of these apps (binaural headphones recommended) and wants to write a review, I’ll be happy to post it here.

Link to Hear Birds Again.