She feels the vibrations and understands what is said to her.
We find that this dissipation, although undoubtedly going on, proceeds with extreme slowness, so that the vibrations pass their energy on to the ether as rapidly as they acquire it, and the " normal state " is never established.
The condenser method of making oscillations is analogous to the production of air vibrations by twanging a harp string at short intervals.
This, therefore, is the number of vibrations corresponding to the note A3.
Vibrations increase in rapidity as a note rises and decrease as it falls.