Laser Microphone: Difference between revisions
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** Has schematics specifically for 60hz hum | ** Has schematics specifically for 60hz hum | ||
** Might also be an amplifier | ** Might also be an amplifier | ||
==Audio Amplifier== | |||
* http://www.techlib.com/electronics/audioamps.html#LM386 | |||
** Has several different schematics for amplifiers. | |||
Revision as of 22:21, 11 June 2010
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.