explore_noise.md

Background

First composite created a roundtrip with a composite signal and Fourier transform on it. Then masking explored the effect of noise masking a sound in theory. This notebook provides a space for experimenting with combined sound and noise signals in practice.

Task

• Type: Explore/experiment
• Task:
  • Play around with the frequency and amplitude of
    • the periodic signal (and/or composite signal),
    • the noise (in which case, by filtering the frequency range)
  • Note your limits: when do you stop hearing the signal?
• Bonus tasks:
  • Go to the masking functions and see how well they match your experience.
  • Write a function to filter the noise, to clear the noise spectrum around a signal periodicity.
  • Plot Fourier transforms of the white noise and the filtered noise to compare.