Do You Hear What I Hear?
I know that over the last few years my hearing has decreased a bit. Either that or the entire planet is mumbling. But I'm married to a drummer, so I always felt as if my hearing was pretty good, comparatively speaking.
Then I found this website. It allows you to test and download ultrasonic ringtones. Adolescents and children hear a lot better than people over thirty, at least a lot of them do. That means they can hear sounds in higher frequencies. Some stores are using ultrasonic sounds to keep teenagers out. And apparently, some teenagers are using ultrasonic ringtones so that they can hear their phones ring but the adults in their lives--teachers, parents--can't.
The website has a series of tones you can test, starting at one that almost everybody can hear, and moving through tones that lots of people can hear, and then on up the scale to stuff the dog can hear.
I can hear 8, 10, and 12 kHz just fine thank you. But when I hit 14.4 kHz, for all I knew the file wasn't working. On repeated tries I've found that sometimes I might hear something, but it might just be that I know other people are hearing it. One of my office mates, Steve, had his teenaged daughter at the office. She could hear all the way up to 18.8 kHz or 19.9 kHz. I find it all very strange. I can't wait to try it on the dog.