According to the textbook, human ear can detect the sound range between 20 Hz to 20,000Hz. As if visual acuity is differ from the species, auditory perception is also differed. For instance, bats may hear higher pitched sounds that are not going to be perceived through our ears. However, certain people, especially engaged in a field of musical activities, have shown acute perception of sound. Special ability in pitch or reference tone is referred as absolute pitch (Absolute Pitch, 2005).
The interesting fact is that certain people who are absolute pitch detector, identifies and make inferences of environment sounds into the musical notes. In other words, they have ability of naming the pitch of non-musical tones. For instance, sound of rustling from the heap of leaves is recognized as sound of 'sol' to a person with perfect-pitch. I come up with a question that what makes them to be so specialized? Actually, I myself devoted quiet a lot of years in music by playing several instruments. I'm also able to identify most of the notes only by hearing. So I actually tried absolute pitch test holds from University of California, San Francisco which I got a result of not an absolute pitch person (bit disappointed).
Only several hypotheses are out in the research world. But usually the researchers assume that there might have genes that link this ability (Absolute Pitch, 2005). I was determined as non absolute-pitch person, but I still available to detect certain notes. Likewise, it seems we are able to enhance certain level of hearing by lifelong training.
You can actually check out your ability from the following link:
Give it a shot!