i am doing a research report and i can not come up with any sources for my subject (i need to come to class tomorrow with 8 sources written down). i have to find sources to help me answer 8 questions all relating to "how do headphones work?"
here are the questions
1. How does the audio travel?
2. How does the plug work?
3. How is bass controlled?
4. What determines the sound quality?
5. How is volume determined?
6. How is the sound then put out by the speakers?
7. What is the difference in headphone jack sizes?
8. What materials are used to make a set of headphones?
Please let me know if any of these questions are dumb and please please please give me some answers if you know them. also post possible search variations i could use to find some sources. i already have http://www.explainthatstuff.com/headphones.html and my teacher says anything wiki is not going to be accepted. PEOPLE I COULD EMAIL INTERVIEW COUNT AS SOURCES so i have rick alden of skullcandy written down. Maybe i'll put down Dr. Dre. please help me i will give out karma if your post is helpful.
and post what question it is in relation to