Electronic Resource
[s.l.]
:
Nature Publishing Group
Nature
18 (1878), S. 540-540
ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] THE form of microphone described by Mr. Gerald B. Francis (NATURE, vol. xviii. p. 383) is easily made and very efficient. It not only did for me all its inventor promised, but with a common tumbler inverted over it upon the sounding-board so as to prevent direct impact of sound waves upon the ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/018540d0
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