4. Amanda Palmer has released a new song dedicated to Puerto Rico: “Small Hands, Small Heart.” All digital sales on Bandcamp this month will go directly to the Hurricane Maria Community Recovery Fund, which supports local grassroots organizations that work directly with low-income communities of color. Read more here, or go straight to Bandcamp to hear and purchase.
Let’s say that we ran two of these sine waves simultaneously. We’d find that the total amplitude would be the sum of the two identical sine waves. So far, so good. But what if we were to “flip” the waveform, so that what was a peak is now a trough, and vice versa? What we get is… silence.