LIN323H1 Lecture Notes - Frequency Domain, Time Series, Eyepiece
Document Summary
Advantages of spectra: frequency or spectral domain: the domain where data pertaining to frequency information is apparent. This can be observed in the realm of speech acoustics with an fft, lpc, or the result of application of a controlled bank of filters. A spectrum or a spectrogram: easy to see harmonic structure (f0, easy to see formant structure, easy to see changes in frequency amplitude, time, hard to perform this analysis. Advantages of time based representations: temporal or time based domain: the domain where only time information is apparent such as a waveform. This is the natural output of a microphone and is the nature of the stored information on any media such as mp3, tape, or a cd. Three ways to express temporal information as spectral information: helmholtz resonators, a controlled bank of filters, fourier analysis (fft, linear predictive coding (lpc) A series of different sized brass spheres with a narrow neck on each one.
