Do you hear what I hear is a relatively famous song that is played at Christmas time. But one day during my Senior year in High School one of my teachers put us to the test. He played the different teen buzz sounds, or "mosquito" sounds to see if our class could hear them. Each noise had a certain age that should be able to hear it.
The first tone, the 8000 kHz, everyone should be able to hear no matter how old you are. As expected, all of us in the class could hear the tone. Then he played the 10,000 kHz which everybody under 60 should be able to hear. Once again, everybody in the class could hear the noise. Then he played he 12,000, 14,000, and 15,000 kHz tones, which correlates to everybody under the ages of 50, 49, and 39 respectively. As predicted, the class of 18 year-old's could hear the noise, but many commentated on how faint the last tone had been. Finally my professor played the 16,000 kHz tone which people under the age of 30 should be able to hear. Much to my surprise, I couldn't hear it, and not one of my classmates could either. The entire class was 18 years old or younger, and no one could hear the tone. I was floored by the fact that nobody could hear the noise we are suppose to hear at our age. So while many people think that the new wave of ringtones could be these "mosquito" ringtones, the small sample of my class shows that even those who are suppose to benefit might not be able to.