100 Days Of ML Code — Day 082

## Recap From Day 081

Day 081, we looked at the third part of loudness and pitch. You can catch up using the link below.
**100 Days Of ML Code — Day 081**
*Recap From Day 080*medium.com

Today, we will continue from where we left off in day 081

## Harmonic Series

Toward the end of day 081, we saw an image that contains two frequencies two sine waves, one at 440 Hertz, and the second one at 880 Hertz. I concluded by asking what happens if we actually listen to them?

Play the two audio above to hear what they sound like. When you played those together, the 440 Hertz sine wave and the 880 Hertz sine wave, how many different pitches did you hear? Okay, that’s enough to get an idea. But if you go ahead and play the 440 Hertz one, you hear that very clearly or play just the 880 Hertz one, you hear that very clearly. But when you play them together you’ll hear something very different.

We find some melding of those because they have this special relationship to one another and this is something that’s even more evident if we go to real-world sounds.

If you play the video above, the sound you’d hear is a trombone sound but we’re not actually hearing the original trombone sounds here. We’re hearing a bunch of sine waves. This is actually a harmonic series. A **harmonic series** is the sequence of sounds pure tones, represented by sinusoidal waves in which the frequency of each sound is an integer multiple of the fundamental, the lowest frequency.

The point is that it’s not just the difference between the linear and logarithmic relationship in terms of frequency pitch but its also a difference between making out individual frequencies and hearing them melding into some bigger composite results

That’s all for day 082. I hope you found this informative. Thank you for taking time out of your schedule and allowing me to be your guide on this journey. And until next time, be legendary.