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Modulation

l.

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Modulation

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  1. l Analysis of speech segments. A) Variation of sound pressure level over time for a representative utterance from the TIMIT corpus (the sentence in this example is "She had your dark suit in greasy wash water all year"). B) Blowup of a 0.1 second segment extracted from the utterance (in this example the vowel sound in "dark"). C) The spectrum of the extracted segment in (B), generated by application of a fast Fourier transform.

  2. Signal T PWM Modulation

  3. Carrier “sidebands” representing baseband signal Baseband signal spectrum

  4. LM393N Full Schematics for Modulator

  5. LM393N Partial Schematics

  6. LM393N Partial Schematics

  7. flat emitter Iphoto IR signal

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