Laser Microphone: Difference between revisions
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* bandpass filters to block out all but voice range. | * bandpass filters to block out all but voice range. | ||
** Possibly adjustable in case someone's voice is deeper/higher | ** 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== | ==Notch Filter== | ||
Revision as of 18:10, 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