Laser Microphone
From HeatSync Labs Wiki
Revision as of 15:21, 11 June 2010 by 64.38.194.13 (Talk)
Random Thoughts
- notch filter to block 60hz hum
- bandpass filters to block out all but voice range.
- Possibly adjustable in case someone's voice is deeper/higher
- The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz
Notch Filter
- http://www.members.shaw.ca/roma/nine.html
- Has schematics specifically for 60hz hum
- Might also be an amplifier
Audio Amplifier
- http://www.techlib.com/electronics/audioamps.html#LM386
- Has several different schematics for amplifiers.
