LIN323H1 Lecture Notes - Piccolo, Sound, Standing Wave
Document Summary
Topic 2 fant"s model of the vocal tract. Source-filter-radiation model: source: vocal chords, filter: vocal tract, radiation: lips and nostrils. Standing waves: it occurs when two progressive waves (the incident wave and the reflected wave) of the same frequency and amplitude travel through the same medium in opposite direction. They appear to be still rather than moving, although both waves are moving in opposite directions. Standing waves are the resultant wave (the sum), which is stationary. All tubes (vocal tract or trumpet) can have standing waves. Only found in an unconstricted tube that is open at one end and closed at the other. Wavelength: the distance between the same point on two successive cycles of a tone (from the beginning of one wave to the beginning of the next) Fundamental resonance (formant frequencies: f = (2k-1)v/4l. V = speed of sound (34,000cm/sec almost constant) L = 17cm (length of vocal tract of a male adult)
