Exercise

Calculating features from the envelope

Now that you've removed some of the noisier fluctuations in the audio, let's see if this improves your ability to classify.

audio_rectified_smooth from the previous exercise is available in your workspace.

Instructions

100 XP

Calculate the mean, standard deviation, and maximum value for each heartbeat sound.
Column stack these stats in the same order.
Use cross-validation to fit a model on each CV iteration.