1. Speakers & Microphones Mark Koh and Mike Renz

2. The Technology Speaker - an electroacoustic transducer that produces sound in response to an electrical audio signal input. Microphone - an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Speakers and Microphones | 4.8.2011

3. Speakers: How They Work Speakers and Microphones | 4.8.2011 Stupid Link?

4. Microphones: How They Work Speakers and Microphones | 4.8.2011

5. The History of the Speaker Invented by Alexander Graham Bell in 1876 in the process of making the first telephone. Speakers and Microphones | 4.8.2011

6. The History of the Microphone First conceptualized by Charles Wheatstone around 1827, but modernized in 1876 by Emile Berliner who invented the first microphone used as a telephone voice transmitter. Speakers and Microphones | 4.8.2011

7. How the Speaker Has Changed Amplified telephone receiver Cylinder compressed air amplifier Moving coil dynamic drivers Speakers and Microphones | 4.8.2011

8. How the Microphone Has Changed Stethoscopes Voice transmitters Carbon microphone Broadcasting microphone Dynamic microphone Speakers and Microphones | 4.8.2011

9. Societal Benefits Made the invention of the telephone possible Large impact on entertainment as a whole Made hearing aids possible Communications Speakers and Microphones | 4.8.2011

10. Thank you! Questions, comments, concerns? Speakers and Microphones | 4.8.2011

11. The Works Bellis, Mary. The History of Microphones. Inventors. About.com, n.d. Web. 8 Apr. 2011.. Daintith, John. Microphone. Dictionary of Physics. New York, NY: Facts on File, 1981. 118. Print. Dynamic Microphones. HowStuffWorks. Discovery Channel, n.d. Web. 6 Apr. 2011.. Harris, Tom. How Speakers Work. hostuffworks. Discovery Channel, n.d. Web. 4 Apr. 2011.. History of Speakers. Articlebase. N.p., 12 Mar. 2009. Web. 6 Apr. 2011.. Kirkland, Kyle. Tape Recorders and Computer Disks. Electricity and Magnetism. New York, NY: Facts on File Inc., 2007. 36. Print. Quantumplative Technologies | 12.7.2010