Contents

1 Introduction

2 Optics: the Gordon metric and its generalizations

3 Non-relativistic acoustics: the Unruh metric

4 Horizons and ergo-surfaces in non-relativistic acoustics

5 Relativistic acoustics

6 Bose–Einstein condensates

7 Surface waves and blocking horizons

8 Optical fibers/optical glass

9 Other models

10 Discussion