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IUB PHYS-P 105 - formant, pitch and filtered speech

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PHYS 105 1nd Edition Lecture 29Outline of Last Lecture I. Articulation of speechOutline of Current Lecture II. Speech intelligibility in noisy environments III. Filtered SpeechIV. Formant PitchCurrent LectureI. Speech intelligibility in noisy environments - Intelligibility of speech in noisy environments depends on the spectrum of the interfering noise - Tone of low frequencies is masks the tones of high frequencies - Typical conversation is about 60 dB for an easily intelligible conversation - Using white noise, the intelligibility of a words drops to 50% if average speech intensity level is equal to the noise intensity levelII. Filtered Speech- Frequency spectrum can be filtered by a ,low pass filter or a high pass filter- Cutoff frequency o The frequency that the output power is the ½ of the normalized output power- It is possible to achieve an acceptable level of articulation with a band-pass filter III. Formant Pitch- Vocal folds control the pitch- Vocal track determines the vowel sounds through its formants and articulates the consonants - Sing vowels are fundamentally the same as the spoken vowelo Singing formants enhance high frequency components These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a


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