© Bob York l Analysis of speech segments. A) Variation of sound pressure level over time for a representative utterance from the TIMIT corpus (the sentence.

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Presentation transcript:

© Bob York 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.

© Bob York Modulation Signal PWM T

© Bob York Baseband signal spectrum Carrier “sidebands” representing baseband signal

© Bob York Full Schematics for Modulator LM393N

© Bob York Partial Schematics LM393N

© Bob York Partial Schematics LM393N

© Bob York IR signal emitter flat I photo