I read from diaper to diaphysis.

The diaper pattern isn't as interesting as I hoped it would be.

https://en.wikipedia.org/wiki/Diapering

There were two examples (actually 3) for diaphone.

The first is from a video of Harry Barry (I have to assume that's his real name) describing how a Type F Diaphone fog horn works. I never knew I wanted to see this. I urge you to watch this video. He seems like a fun guy. 

https://youtu.be/TO3vp0Sh-wE

The second example (of 2 diaphones) is from here.  It's a little diaphone "call and response".

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