It is difficult to draw a line between public and private sounds because no sound can be one or the other all the time. The nature of sound is that it permeates its surrounding area and often cannot be stopped from incorporating people or things. Therefore, a sound may be private in one moment (ex: the sound of your own breathing) but then as long as one person draws near enough to hear it the sound becomes public. Walkmans, iPods, and smartphones allow people to choose the music they listen to and tune out the world around them. This seems to be the most common idea of private music. Hosokawa discusses three kinds of public music. He focuses specifically on urban life. One type is the music that seems to drown into the overall sounds of a city environment. The second is the street musicians who have the power to unite a group of people that are caught in the space reached by the music. The third kind is someone who is choosing the music based on what he or she wants to hear but is still playing it out loud so that others can hear as well.
Since reading the different theorist for this unit, I have found myself paying more attention to the keynote sounds in my environment. I have tried to identify the sounds around me that have become so routine, I have forgotten they were there. I also have found myself analyzing the difference in how I view the world with my headphones in vs. with my headphones out. I find that with my headphones in I am focused on various other things and not only tuning out the acoustic environment around me but also the visual/physical environment around me.