diff --git a/README.md b/README.md
index be24f68..4a4614e 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,14 @@ and this file, none of this work is creative and thus none of it is subject to
 copyright.
 
 Note that the name of each model is not meaningful.
+
+## Model information
+
+The following table maps expected signal (horizontal) against expected noise
+(vertical). Note that "voice" is distinct from "speech" by the presence of
+non-speech human sounds, such as laughter.
+
+|                   | General               | Voice                 | Speech                |
+| ----------------- | --------------------- | --------------------- | --------------------- |
+| General           | marathon-prescription |                       | orig                  |
+| Recording         | conjoined-burgers     |                       |                       |