Oscillator: Air under pressure from the lungs make the vocal folds vibrate. Without the “resonator cavities”, the vibrations sound like lips vibrating, or a trumpet or trombone mouthpiece being “buzzed” (with a central frequency when singing). The tension in the vocal muscles control the pitch.
Range of Frequencies for the Normal Speaking Human Voice Males: 70-200 Hz Females: 140-400 (men have more dense and longer vocal folds) Singing voices (especially the higher harmonics) extend the range into the kilohertz region.
formants Formants: A range of frequencies that are enhanced. The shape of the envelope determines what vowel you hear!
We can model the vocal cavity as a 17cm long conical tube closed at one end (the vocal fold end). Hence the harmonics expected would be f n =n v/4(.17) = 1, 2, 3 kHz, etc. The Q is very low due to the softness of the cavity tissue, so the resonances are rather broad.
Different shapes create different formant frequencies
Operatic Tenor & Orchestra Acoustic power in formants allow operatic singer to be heard over orchestra.
CT 8.3.2 Musicians refer to tremolo when the loudness fluctuates while the pitch remains unchanged. Is this an example of… A: Frequency modulation. B: Amplitude modulation.
CT 8.3.2b Musicians refer to vibrato when the pitch is wiggled up and down as you sing. Is this an example of… A: Frequency modulation. B: Amplitude modulation. Violinists can make “excursions” From concert A of.2 semitones, 6 times/sec. 6 Hz -> “signal frequency” 440 Hz -> “carrier frequency” 0.2 semitones-> strength of the modulation