Meniscus Microphones a New Form of Sound Transmitter
The book Meniscus Microphones a New Form of Sound Transmitter was written by author E B H Wade Here you can read free online of Meniscus Microphones a New Form of Sound Transmitter book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Meniscus Microphones a New Form of Sound Transmitter a good or bad book?
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It is obvious that if 'the levelling table is tilted by means of the screw S so as to make P rise the orifice will pierce right through the meniscus and there will be no channel from J to C. The milliammeter will read zero. If we tilt far enough in the opposite direction the nozzle is completely immersed and there is easy communication. The milliammeter will be found to read 5 M/A. If a watch W is placed on the base of the instrument, no sound will be heard in the receiver in either of these tw...o cases, but if we now turn S till the nozzle just grazes the meniscus and the mil- liammeter reads from 2 to 3-5 M/A the watch will be heard very clearly. The adjustment is by no means a fine one. 48141)6 . . . - 2 4. The reason why we hear the watch only at grazing incidence appears to be as follows. The sound vibrations force the plunger P in and out of the liquid in J, just as, in the human ear, it is transferred from the stapes to the fluid of the labyrinth, the rubber R paying the part of the annular ligament.
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