1. Bell and Blake’s ear phonautograph 32
2. Leon Scott’s phonautograph 36
3. Drawing of sound refraction from S. Morland,
Tuba Stentoro-Phonica 43
4. Edison’s tinfoil phonograph 47
5. Berliner’s gramophone 47
6. Early gramophone record 48
7. Early Reis telephone 78
8. The human telephone, 1897 82
9. “You Need a Headset”—1925 advertisement for
Brandes headphones 88
10. “How Far Can I Hear with the mr-6?”—DeForest advertisement
from the early 1920s 89
11. Diagram of Laennec’s stethoscope 104
12. Monaural stethoscopes 105
13. Cammann’s stethoscope 112
14. Binaural stethoscopes 113
15a-b. Telegraphy—ancient and modern 139
16. Diagram of printing telegraph 145
17. Train telegraph operator, 1890 159
18. Hearing tubes in Edison catalog, ca. 1902 162
19. Advertisement for the Berliner gramophone 164
20. Students at the Marconi Wireless School 165
21. Cartoon of frustrated housewife, 1923 166
List of Figures
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